Driver IC

BD6088GUL

Rohm

Mulitifunction Backlight LED Driver for Small LCD Panels (Charge Pump Type)

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Description BD6088GUL is “Intelligent LED Driver” that is the most suitable for the cellular phone. It has 6LED driver for LCD Backlight and GPO 4 port. It has ALC function, that is “Low Power Consumption System” realized. It can be developed widely from the model high End to the model Low End. As it has charge pump circuit for DCDC, it is no need to use coils, and it contributes to small space. VCSP50L3(3.50mm×3.50mm 0.5mm space) It adopts the very thin CSP package that is the most suitable for the slim phone.
Functions 1) Total 6LEDs driver for LCD Backlight It have 4LEDs (it can select 4LED or 3LED) for exclusire use of Main and 2LEDs which can chose independent control or a main allotmert by resister setting. “Main Group” can be controlled by Auto Luminous Control (ALC) system. “Main Group” can be controlled by external PWM signal. ON/ off and a setup of electric current are possible at the time of the independent control by the independence. 2) Ambient Light sensor interface Main backlight can be controlled by ambient brightness. Photo Diode, Photo Transistor, Photo IC(Linear/Logarithm) can be connected. Bias source for ambient light sensor, gain and offset adjustment are built in. LED driver current as ambient level can be customized. 3) Charge Pump DC/DC for LED driver It has x1/x1.5/ x2 mode that will be selected automatically. The most suitable voltage up magnification is controlled automatically by LED port voltage. Output voltage fixed mode function loading (3.9V/4.2V/4.5V/4.8V) Soft start functions, Over voltage protection (Auto-return type), Over current protection (Auto-return type) Loading 4) GPO 4 Port Open Drain output and slope control loading 5) Thermal shutdown 6) I 2C BUS FS mode(max 400kHz) *This chip is not designed to protect itself against radioactive rays. *This material may be changed on its way to designing. *This material is not the official specification.
Absolute Maximum Ratings (Ta=25 oC) Parameter Symbol Ratings Unit Maximum voltage VMAX 7 V Power Dissipation Pd 1380 (note mW Operating Temperature Range Topr -30 ～ +85 ℃ Storage Temperature Range Tstg -55 ～ +150 ℃ note) Power dissipation deleting is 11.04mW/ oC, when it’s used in over 25 oC. (It’s deleting is on the board that is ROHM’s standard)
Operating conditions (VBAT ≥VIO, Ta=-35~85 oC) Parameter Symbol Ratings Unit VBAT input voltage VBAT 2.7 ～ 5.5 V VIO pin voltage VIO 1.65 ～ 3.3 V No.11040EAT29

Electrical Characteristics (Unless otherwise specified, Ta=25°C, VBAT=3.6V, VIO=2.6V) Parameter Symbol Limits Unit Condition Min. Typ. Max. 【Circuit Current】 VBAT Circuit current 1 IBAT1 - 0.1 3.0 μA RESETB=0V, VIO= 0V VBAT Circuit current 2 IBAT2 - 0.5 3.0 μA RESETB=0V, VIO=2.6V VBAT Circuit current 3 IBAT3 - 61 65 mA DC/DC x1 mode, Io=60mA VBAT=4.0V VBAT Circuit current 4 IBAT4 - 92 102 mA DC/DC x1.5 mode, Io=60mA VBAT=3.6V VBAT Circuit current 5 IBAT5 - 123 140 mA DC/DC x2 mode, Io=60mA VBAT=2.7V VBAT Circuit current 6 IBAT6 - 0.25 1.0 mA ALC Operating ALCEN=1, AD cycle=0.5s setting Except sensor current 【LED Driver】 LED current Step (Setup) ILEDSTP1 128 Step LED1~6 LED current Step (At slope) ILEDSTP2 256 Step LED1~6 LED Maximum setup current IMAXWLED - 25.6 - mA LED1~6 LED current accuracy IWLED -7% 15 +7% mA I LED=15mA setting, VLED=1.0V LED current Matching ILEDMT - - 4 % Between LED1~6 at VLED=1.0V, ILED=15mA LED OFF Leak current ILKLED - - 1.0 μA VLED=4.5V 【DC/DC(Charge Pump)】 Output Voltage 1 VoCP1 - Vf+0.2 Vf+0.25 V Vf is forward direction of LED Output Voltage 2 VoCP2 3.705 3.9 4.095 V Fixation Voltage Output ModeIo=60mA VBAT≧3.2V 3.99 4.2 4.41 V 4.275 4.5 4.725 V 4.56 4.8 5.04 V Drive ability IOUT - - 150 mA VBAT ≥3.2V, VOUT=3.9V Switching frequency fosc 0.8 1.0 1.2 MHz Over Voltage Protection detect voltage OVP - 6.0 6.5 V Over Current Protection detect Current OCP - 250 375 mA VOUT=0V 【Sensor Interface】 SBIAS Output Voltage VoS 2.85 3.0 3.15 V Io=200µA 2.47 2.6 2.73 V Io=200µA SBIAS Maximum Output current Ioma xS 30 - - mA Vo=2.6V setting SBIAS Discharge resister at OFF ROFFS - 1.0 1.5 k Ω SSENS Input range VISS 0 - VoS× 255/256 V ADC resolution ADRES 8 bit ADC integral calculus non-linearity ADINL -3 - +3 LSB ADC differential calculus non-linearity ADDNL -1 - +1 LSB

Electrical Characteristics (Unless otherwise specified, Ta=25°C, VBAT=3.6V, VIO=2.6V) Parameter Symbol Limits Unit Condition Min. Typ. Max. 【SDA, SCL】 (I 2C Interface) L level input voltage VILI -0.3 - 0.25 × VIO V H level input voltage VIHI 0.75 × VIO - VBAT +0.3 V Hysteresis of Schmitt trigger input VhysI 0.05 × VIO - - V L level output voltage VOLI 0 - 0.3 V SDA Pin, IOL=3 mA Input current linI - - 1 μA Input Voltage = 0.1×VIO～0.9×VIO 【RESETB】 (CMOS Input Pin) L level input voltage VILR -0.3 - 0.25 × VIO V H level input voltage VIHR 0.75 × VIO - VBAT +0.3 V Input current IinR - - 1 μA Input Voltage = 0.1×VIO～0.9×VIO 【WPWMIN】 (NMOS Input Pin) L level input voltage VILA -0.3 - 0.3 V H level input voltage VIHA 1.4 - VBAT +0.3 V Input Current IinA - - 1 μA Input Voltage = 0.1×VBAT～0.9×VBAT PWM input minimum High pulse width PWmin 80 - - μs WPWMIN Pin 【OUTCNT】 (Pull-down resistan ce NMOS Input Pin) L level input voltage VILA -0.3 - 0.3 V H level input voltage VIHA 1.4 - VBAT +0.3 V Input Current IinA - 3.6 10 μA Vin=1.8V 【OUT1～4】 ( NMOS Open Drain Output Pin) L level output voltage VOLG - - 0.3 V IOL=10mA Output Leak current ILKG - - 1.0 μA Vout=3.6V 【GC1, GC2】 (Sensor Gain Control CMOS Output Pin) L level output voltage VOLS - - 0.2 V IOL=1mA H level output voltage VOHS VoS -0.2 - - V IOH=1mA 【KBLT】 (Key Back Light Control CMOS Output Pin) L level output voltage VOLK - - 0.2 V IOL=1mA H level output voltage VOHK VIO -0.2 - - V IOH=1mA Pull-downregistance RPUDK - 1.0 2.0 MΩ Vin=3.3V

Block Diagram / Application Circuit example 1 OUT3 OUT1 OUT2 OUT4 C2P C1P Charge Pump VBATCP I C interface C1N IREF TSD LED1 Main Back Light LEDGND x1 / x1.5 / x2 Charge Pump Mode Control VOUT OVP C2N CPGND LED terminal voltage feedback 1μF 1μF 1μF Digital Control 10µF Level Shift VIO RESETB SCL SDA VBAT WPWMIN LED2 LED3 LED4 LED5 VBAT1 LED6 GPO VREF I/O GND1 KBLT Key Control VBAT Key Pad LED OUTCNT (Open) ALC Slope Control Slope Control Slope Control Slope Control Sensor I/F SBIAS BH1600FVC SGND GC1 1μF GC2 VDD GND IOUT GC2 Photo IC SSENS GC1 LED control ( ) ( ) VBAT ( ) Fig.1 Block Diagram / Application Circuit example 1

Block Diagram / Application Circuit example 2 KBLT OUT3 OUT1 OUT2 OUT4 C2P C1P Charge Pump VBATCP I C interface C1N IREF TSD LED1 4ch Main Back Light LEDGND x1 / x1.5 / x2 Charge Pump Mode Control VOUT OVP C2N CPGND LED terminal voltage feedback 1μF 1μF 1μF Digital Control 10µF Level Shift VIO RESETB SCL SDA VBAT WPWMIN LED2 LED3 LED4 LED5 VBAT1 LED6 GPO VREF I/O GND1 Key Control VBAT Key Pad LED OUTCNT (Open) ALC Slope Control Slope Control Slope Control Slope Control Sensor I/F SBIAS BH1600FVC SGND GC1 1μF GC2 VDD GND IOUT GC2 Photo IC SSENS GC1 LED control ( ) ( ) VBAT 2ch Sub Back Light ( ) Fig.2 Block Diagram / Application Circuit example 2

Pin Arrangement ［Bottom View］ 6 x 6 Ball F T4 SSENS SGND VBAT1 VIO E SBIAS GC1 GC2 SDA OUT2 OUT4 D LED5 LED6 SCL OUT1 OUT3 VOUT C LEDGND LED4 OUTCNT WPWMIN C1P C2P B LED2 LED3 RESETB KBLT C2N VBATCP A INDEX T1 LED1 GND1 C1N CPGND T2 1 2 3 4 5 6

Package VCSP50L3 CSP small package SIZE : 3.50mm×3.50mm(A difference in public： X,Y Both ±0.05mm) Height : 0.55mm max A ball pitch : 0.5 mm 2

Pin Functions No Ball No. Pin Name I/O ESD Diode Functions Equivalent Circuit For Power For Ground

1 B6 VBATCP - - GND Battery is connected A

2 F4 VBAT1 - - GND Battery is connected A

3 A1 T1 I VBAT - Test Ground Pin(short to Ground) B

4 A6 T2 I VBAT GND Test Input Pin (short to Ground) S

5 F6 T3 O VBAT GND Test Output Pin(Open) M

6 F1 T4 I VBAT GND Test Input Pin (short to Ground) S

7 F5 VIO - VBAT GND I/O Power supply is connected C

8 B3 RESETB I VBAT GND Reset input (L: reset, H: reset cancel) H

9 E4 SDA I/O VBAT GND I 2C data input / output I

10 D3 SCL I VBAT GND I 2C clock input H

11 A5 CPGND - VBAT - Ground B

12 A3 GND1 - VBAT - Ground B

13 C1 LEDGND - VBAT - Ground B

14 A4 C1N I/O VBAT GND Charge Pump capacitor is connected F

15 C5 C1P I/O - GND Charge Pump capacitor is connected G

16 B5 C2N I/O VBAT GND Charge Pump capacitor is connected F

17 C6 C2P I/O - GND Charge Pump capacitor is connected G

18 D6 VOUT O - GND Charge Pump output pin A

19 A2 LED1 I - GND LED is connected 1 for LCD Back Light E

20 B1 LED2 I - GND LED is connected 2 for LCD Back Light E

21 B2 LED3 I - GND LED is connected 3 for LCD Back Light E

22 C2 LED4 I - GND LED is connected 4 for LCD Back Light E

23 D1 LED5 I - GND LED is connected 5 for LCD Back Light E

24 D2 LED6 I - GND LED is connected 6 for LCD Back Light E

25 E1 SBIAS O VBAT GND Bias output for the Ambient Light Sensor Q

26 F2 SSENS I VBAT GND Ambi ent Light Sensor input N

27 E2 GC1 O VBAT GND Ambient Light Sensor gain control output 1 X

28 E3 GC2 O VBAT GND Ambient Light Sensor gain control output 2 X

29 F3 SGND - VBAT - Ground B

30 D4 OUT1 O - GND General Output Port 1 U

31 E5 OUT2 O - GND General Output Port 1 U

32 D5 OUT3 O - GND General Output Port 1 U

33 E6 OUT4 O - GND General Output Port 1 U

34 C4 WPWMIN I VBAT GND Exter nal PWM input for Back Light * V

35 C3 OUTCNT I VBAT GND OUT1,2,3 ,4 Output Control (L:OFF) * L

36 B4 KBLT O VBAT GND Key Back Light Control Output W

A setup of a register is separately necessary to make it effective.

Equivalent Circuit VBATCA VBATB E U VBAT F VIOVBATH VIOVBAT I VIO VBAT J VBATVBAT L VBAT VBAT Q VoS VBATX VBATVBAT R VBATN VBATVBATS VBAT W VIO VBAT VBATM VIO VBATY G VBAT VBAT V

I2C BUS format The writing/reading operation is based on the I2C slave standard. ・Slave address A7 A6 A5 A4 A3 A2 A1 R/W 1 1 1 0 1 1 0 1/0 ・Bit Transfer SCL transfers 1-bit data during H. SCL cannot change signal of SDA during H at the time of bit transfer. If SDA changes while SCL is H, START conditions or STOP conditions will occur and it will be interpreted as a control signal. SDA SCL SDA a state of stability： Data are effective SDA It can change ・START and STOP condition When SDA and SCL are H, data is not transferred on the I 2C- bus. This condition indicates, if SDA changes from H to L while SCL has been H, it will become START (S) conditions, and an access start, if SDA changes from L to H while SCL has been H, it will become STOP (P) conditions and an access end. SDA SCL S P START condition STOP condition ・Acknowledge It transfers data 8 bits each after the occurrence of START condition. A transmitter opens SDA after transfer 8bits data, and a receiver returns the acknowledge signal by setting SDA to L. 12 89 DATA OUTPUT BY TRANSMITTER DATA OUTPUT BY RECEIVER acknowledge not acknowledge S START condition clock pulse for acknowledgement SCL

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL ・Writing protocol A register address is transferred by the next 1 byte that transferred the slave address and the write-in command. The 3rd byte writes data in the internal register written in by the 2nd byte, and after 4th byte or, the increment of register address is carried out automatically. However, when a register address turns into the last address, it is set to 00h by the next transmission. After the transmission end, the increment of the address is carried out. S A A A P register addressslave address from master to slave from slave to master R/W=0(write) DATA AD7D6D5D4D3D2D1D0 D7 D6 D5 D4 D3 D2D1D0A7 A6 A5 A4 A3 A2 A1 A00 X X X X X X X *1 *1 DATA A=acknowledge(SD A LOW) A=not acknowledge(SDA HIGH) S=START condition P=STOP condition *1: Write Timing register address increment register address increment ・Reading protocol It reads from the next byte after writing a slave address and R/W bit. The register to read considers as the following address accessed at the end, and the data of the address that carried out the increment is read after it. If an address turns into the last address, the next byte will read out 00h. After the transmission end, the increment of the address is carried out.

1 S A P

R/W=1(read) DATA A DATA slave address D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0 register address increment X X X X X X X A=acknowledge(SDA LOW) A=not acknowledge(SDA HIGH) S=START condition P=STOP condition register address increment A ・Multiple reading protocols After specifying an internal address, it reads by repeated START condition and changing the data transfer direction. The data of the address that carried out the increment is read after it. If an address turns into the last address, the next byte will read out 00h. After the transmission end, the increment of the address is carried out. R/W=0(write) R/W=1(read) slave address register address slave address DATA DATA S A A A Sr 1 0 A7 A6A5 A4A3 A2A1A0X X X X X X X X X X X X X X A=acknowledge(SDA LOW) A=not acknowledge(SDA HIGH) S=START condition P=STOP condition from master to slave from slave to master register address increment register address increment P AD7 D6 D5 D4 D3D2D1D0 D7D6D5D4D3D2D1D0 A Sr=repeated START condition As for reading protocol and multiple reading protocols, please do A(not acknowledge) after doing the final reading operation. It stops with read when ending by A(acknowledge), and SDA stops in the state of Low when the readingdata of that time is 0. However, this state returns usually when SCL is moved, data is read, and A(not acknowledge)is done.

Timing diagram SDA SCL t SU;DAT t LOW S Sr P S t BUF t HD;STA t SU;STA t HIGH t HD;STA t HD;DAT t SU;STO
Electrical Characteristics(Unless otherwise specified, Ta=25 oC, VBAT=3.6V, VIO=2.6V) Parameter Symbol Standard-mode Fast-mode Unit 【I2C BUS format】 SCL clock frequency fSCL 0 - 100 0 - 400 kHz LOW period of the SCL clock tLOW 4.7 - - 1.3 - - μs HIGH period of the SCL clock tHIGH 4.0 - - 0.6 - - μs Hold time (repeated) START condition After this period, the first clock is generated tHD;STA 4.0 - - 0.6 - - μs Set-up time for a repeated START condition t SU;STA 4.7 - - 0.6 - - μs Data hold time tHD;DAT 0 - 3.45 0 - 0.9 μs Data set-up time tSU;DAT 250 - - 100 - - ns Set-up time for STOP condition tSU;STO 4.0 - - 0.6 - - μs Bus free time between a STOP and START condition tBUF 4.7 - - 1.3 - - μs

Register List Address W/R Register data Function D7 D6 D5 D4 D3 D2 D1 D0 00h W VOUT(1) VOUT(0) DCDCMD DCDCFON - - - SFTRST Software Reset DC/DC function setting 01h W WPWMEN WPWMPOL - - W6MD W5MD W4MD MLEDMD LED Pin function setting 02h W/R - - - - ALCEN W6EN W5EN MLEDEN Power Control 03h W - IMLED(6) IMLED(5) IMLED(4) IM LED(3) IMLED(2) IMLED(1) IMLED(0) Main group current setting 04h W - IW5(6) IW5(5) IW5(4) IW5(3) IW5(2) IW5(1) IW5(0) LED5 current setting 05h W - IW6(6) IW6(5) IW6(4) IW6(3) IW6(2) IW6(1) IW6(0) LED6 current setting 06h W THL (3) THL (2) THL (1) THL (0) TLH (3) TLH (2) TLH (1) TLH (0) Main Current transition 07h W ADCYC (1) ADCYC (0) GAIN (1) GAIN(0) STYPE VSB MDCIR SBIASON Measurement mode setting 08h W SOFS (3) SOFS (2) SOFS (1) SOFS (0) S GAIN (3) SGAIN (2) SGAIN (1) SGAIN (0) Measurement data adjustment 09h R - - - - AMB (3) AMB (2) AMB (1) AMB (0) Ambient level 0Ah W - IU0 (6) IU0 (5) IU0 (4) IU 0 (3) IU0 (2) IU0 (1) IU0 (0) LED Current at Ambient level 0h 0Bh W - IU1 (6) IU1 (5) IU1 (4) IU 1 (3) IU1 (2) IU1 (1) IU1 (0) LED Current at Ambient level 1h 0Ch W - IU2 (6) IU2 (5) IU2 (4) IU 2 (3) IU2 (2) IU2 (1) IU2 (0) LED Current at Ambient level 2h 0Dh W - IU3 (6) IU3 (5) IU3 (4) IU 3 (3) IU3 (2) IU3 (1) IU3 (0) LED Current at Ambient level 3h 0Eh W - IU4 (6) IU4 (5) IU4 (4) IU 4 (3) IU4 (2) IU4 (1) IU4 (0) LED Current at Ambient level 4h 0Fh W - IU5 (6) IU5 (5) IU5 (4) IU 5 (3) IU5 (2) IU5 (1) IU5 (0) LED Current at Ambient level 5h 10h W - IU6 (6) IU6 (5) IU6 (4) IU 6 (3) IU6 (2) IU6 (1) IU6 (0) LED Current at Ambient level 6h 11h W - IU7 (6) IU7 (5) IU7 (4) IU 7 (3) IU7 (2) IU7 (1) IU7 (0) LED Current at Ambient level 7h 12h W - IU8 (6) IU8 (5) IU8 (4) IU 8 (3) IU8 (2) IU8 (1) IU8 (0) LED Current at Ambient level 8h 13h W - IU9 (6) IU9 (5) IU9 (4) IU 9 (3) IU9 (2) IU9 (1) IU9 (0) LED Current at Ambient level 9h 14h W - IUA (6) IUA (5) IUA (4) IU A (3) IUA (2) IUA (1) IUA (0) LED Current at Ambient level Ah 15h W - IUB (6) IUB (5) IUB (4) IU B (3) IUB (2) IUB (1) IUB (0) LED Current at Ambient level Bh 16h W - IUC (6) IUC (5) IUC (4) I UC (3) IUC (2) IUC (1) IUC (0) LED Current at Ambient level Ch 17h W - IUD (6) IUD (5) IUD (4) I UD (3) IUD (2) IUD (1) IUD (0) LED Current at Ambient level Dh 18h W - IUE (6) IUE (5) IUE (4) IU E (3) IUE (2) IUE (1) IUE (0) LED Current at Ambient level Eh 19h W - IUF (6) IUF (5) IUF (4) IUF (3) IUF (2) IUF (1) IUF (0) LED Current at Ambient level Fh 1Ah W - - CHYS (1) CHYS (0) CTH (3) CTH (2) CTH (1) CTH (0) Key driver 2 Value judging control setup 1Bh W - - - KBMD OUT4MD OUT3MD OUT2MD OU T1MD OUT, KBLT Output Mode setting 1Ch W/R - - - KBEN OUT4EN OUT3EN OUT2EN OUT1EN OUT, KBLT Output Control 1Dh W FPWM - - - KBSLP(1) KBSLP(0) OUTSLP(1) OUTSLP(0) OUT, KBLT Slope setting Input "0” for "-". A free address has the possibility to assign it to the register for the test. Access to the register for the test and the undefined register is prohibited.

Register Map Address 00h < Software Reset , DC/DC function setting > Address R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 00h W VOUT(1) VOUT(0) DCDCMD DCDCFON - - - SFTRST Initial Value 00h 0 0 0 0 - - - 0 Bit [7:6] : VOUT (1:0) VOUT Output Voltage setting “ 0 0 ” : V O U T O u t p u t V o l t a g e 3 . 9 V “ 0 1 ” : V O U T O u t p u t V o l t a g e 4 . 2 V “ 1 0 ” : V O U T O u t p u t V o l t a g e 4 . 5 V “ 1 1 ” : V O U T O u t p u t V o l t a g e 4 . 8 V Bit [5:4] : DCDCMD, DCDCFON DC/DC setting < D C / D C R e t u r n M o d e > < D C / D C O N / O F F C o n t r o l > “00” : LED Pin Return Depend on LED ON/OFF “01” : LEDPin Return Depend on LED ON/OFF “10” : Output Voltage Fixation Depend on LED ON/OFF “ 1 1 ” : O u t p u t V o l t a g e F i x a t i o n C o m p u l s i o n O N Bit [3:1] : (Not used) Bit0 : SFTRST Software Reset “0” : Reset cancel “1” : Reset(All register initializing) Refer to “The explanation of Reset” for detail.

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL Address 01h < LED Pin function setting> Address R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 01h W WPWMEN WPWMPOL - - W6MD W5MD W4MD MLEDMD Initial Value 42h 0 1 - - 0 0 1 0 Bit7 : WPWMEN External PWM Input “WPWMIN” terminal Enable Control (Valid/Invalid) “0” : External PWM input invalid “1” : External PWM input valid Refer to “(11) Current Adjustment” of “The explanation of ALC” for detail. Bit6 : WPWMPOL Polarity setting of External PWM input "WPWMIN" terminal “ 0 ” : E x t e r n a l P W M ’ L ’ d r i v e “ 1 ” : E x t e r n a l P W M ’ H ’ d r i v e Refer to “(11) Current Adjustment” of “The explanation of ALC” for detail. Bit [5:4] : (Not used) Bit3 : W6MD LED6 control setting (individual / Main group) “0” : LED6 individual control “1” : LED6 Main group control Refer to “LED Driver” for detail. Bit2 : W5MD LED5 control setting (individual / Main group) “0” : LED5 individual control “1” : LED5 Use (Main group) Refer to “LED Driver” for detail. Bit1 : W4MD LED4 movement setting (unuse / use) “0” : LED4 unuse “1” : LED4 use (Main group Control) Refer to “LED Driver” for detail. Bit0 : MLEDMD Main group setting (Normal / ALC) “0” : Main group Normal Mode(ALCNon-reflection) “1” : Main group ALC Mode Refer to “(1) Auto Luminous Control ON/OFF” of “The explanation of ALC” for detail. Set up a fixation in every design because it isn't presumed W*PW that it is changed dynamically. And, do the setup of W*PW when each LED is Off.

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL Address 02h < Power Control> Address R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 02h W/R - - - - ALCEN W6EN W5EN MLEDEN Initial Value 00h - - - - 0 0 0 0 Bit [7:4] : (Not used) Bit3 : ALCEN ALC function Control (ON/OFF) “0” : ALC block OFF “1” : ALC block ON (Ambient Measurement) Bit2 : W6EN LED6 Control (ON/OFF) “0” : LED6 OFF “1” : LED6 ON(individual control) Bit1 : W5EN L E D 5 C o n t r o l ( O N / O F F ) “0” : LED5 OFF “1” : LED5 ON(individual control) Bit0 : MLEDEN Main group LED Control (ON/OFF) “0” : Main group OFF “1” : Main group ON

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL Address 03h < Main group LED Current setting(Normal Mode) > Address R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 03h W - IMLED(6) IMLED(5) IMLED(4) IM LED(3) IMLED(2) IMLED(1) IMLED(0) Initial Value 00h - 0 0 0 0 0 0 0 Bit7 : (Not used) Bit [6:0] : IMLED (6:0) Main Group LED Current Setting at non-ALC mode “0000000” : 0.2 mA “1000000” : 13.0 mA “0000001” : 0.4 mA “1000001” : 13.2 mA “0000010” : 0.6 mA “1000010” : 13.4 mA “0000011” : 0.8 mA “1000011” : 13.6 mA “0000100” : 1.0 mA “1000100” : 13.8 mA “0000101” : 1.2 mA “1000101” : 14.0 mA “0000110” : 1.4 mA “1000110” : 14.2 mA “0000111” : 1.6 mA “1000111” : 14.4 mA “0001000” : 1.8 mA “1001000” : 14.6 mA “0001001” : 2.0 mA “1001001” : 14.8 mA “0001010” : 2.2 mA “1001010” : 15.0 mA “0001011” : 2.4 mA “1001011” : 15.2 mA “0001100” : 2.6 mA “1001100” : 15.4 mA “0001101” : 2.8 mA “1001101” : 15.6 mA “0001110” : 3.0 mA “1001110” : 15.8 mA “0001111” : 3.2 mA “1001111” : 16.0 mA “0010000” : 3.4 mA “1010000” : 16.2 mA “0010001” : 3.6 mA “1010001” : 16.4 mA “0010010” : 3.8 mA “1010010” : 16.6 mA “0010011” : 4.0 mA “1010011” : 16.8 mA “0010100” : 4.2 mA “1010100” : 17.0 mA “0010101” : 4.4 mA “1010101” : 17.2 mA “0010110” : 4.6 mA “1010110” : 17.4 mA “0010111” : 4.8 mA “1010111” : 17.6 mA “0011000” : 5.0 mA “1011000” : 17.8 mA “0011001” : 5.2 mA “1011001” : 18.0 mA “0011010” : 5.4 mA “1011010” : 18.2 mA “0011011” : 5.6 mA “1011011” : 18.4 mA “0011100” : 5.8 mA “1011100” : 18.6 mA “0011101” : 6.0 mA “1011101” : 18.8 mA “0011110” : 6.2 mA “1011110” : 19.0 mA “0011111” : 6.4 mA “1011111” : 19.2 mA “0100000” : 6.6 mA “1100000” : 19.4 mA “0100001” : 6.8 mA “1100001” : 19.6 mA “0100010” : 7.0 mA “1100010” : 19.8 mA “0100011” : 7.2 mA “1100011” : 20.0 mA “0100100” : 7.4 mA “1100100” : 20.2 mA “0100101” : 7.6 mA “1100101” : 20.4 mA “0100110” : 7.8 mA “1100110” : 20.6 mA “0100111” : 8.0 mA “1100111” : 20.8 mA “0101000” : 8.2 mA “1101000” : 21.0 mA “0101001” : 8.4 mA “1101001” : 21.2 mA “0101010” : 8.6 mA “1101010” : 21.4 mA “0101011” : 8.8 mA “1101011” : 21.6 mA “0101100” : 9.0 mA “1101100” : 21.8 mA “0101101” : 9.2 mA “1101101” : 22.0 mA “0101110” : 9.4 mA “1101110” : 22.2 mA “0101111” : 9.6 mA “1101111” : 22.4 mA “0110000” : 9.8 mA “1110000” : 22.6 mA “0110001” : 10.0 mA “1110001” : 22.8 mA “0110010” : 10.2 mA “1110010” : 23.0 mA “0110011” : 10.4 mA “1110011” : 23.2 mA “0110100” : 10.6 mA “1110100” : 23.4 mA “0110101” : 10.8 mA “1110101” : 23.6 mA “0110110” : 11.0 mA “1110110” : 23.8 mA “0110111” : 11.2 mA “1110111” : 24.0 mA “0111000” : 11.4 mA “1111000” : 24.2 mA “0111001” : 11.6 mA “1111001” : 24.4 mA “0111010” : 11.8 mA “1111010” : 24.6 mA “0111011” : 12.0 mA “1111011” : 24.8 mA “0111100” : 12.2 mA “1111100” : 25.0 mA “0111101” : 12.4 mA “1111101” : 25.2 mA “0111110” : 12.6 mA “1111110” : 25.4 mA “0111111” : 12.8 mA “1111111” : 25.6 mA

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL Address 04h < LED5 Current setting(Independence control) > Address R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 04h W - IW5(6) IW5(5) IW5(4) IW 5(3) IW5(2) IW5(1) IW5(0) Initial Value 00h - 0 0 0 0 0 0 0 Bit7 : (Not used) Bit [6:0] : IW5 (6:0) L E D 5 Current setting “0000000” : 0.2 mA “1000000” : 13.0 mA “0000001” : 0.4 mA “1000001” : 13.2 mA “0000010” : 0.6 mA “1000010” : 13.4 mA “0000011” : 0.8 mA “1000011” : 13.6 mA “0000100” : 1.0 mA “1000100” : 13.8 mA “0000101” : 1.2 mA “1000101” : 14.0 mA “0000110” : 1.4 mA “1000110” : 14.2 mA “0000111” : 1.6 mA “1000111” : 14.4 mA “0001000” : 1.8 mA “1001000” : 14.6 mA “0001001” : 2.0 mA “1001001” : 14.8 mA “0001010” : 2.2 mA “1001010” : 15.0 mA “0001011” : 2.4 mA “1001011” : 15.2 mA “0001100” : 2.6 mA “1001100” : 15.4 mA “0001101” : 2.8 mA “1001101” : 15.6 mA “0001110” : 3.0 mA “1001110” : 15.8 mA “0001111” : 3.2 mA “1001111” : 16.0 mA “0010000” : 3.4 mA “1010000” : 16.2 mA “0010001” : 3.6 mA “1010001” : 16.4 mA “0010010” : 3.8 mA “1010010” : 16.6 mA “0010011” : 4.0 mA “1010011” : 16.8 mA “0010100” : 4.2 mA “1010100” : 17.0 mA “0010101” : 4.4 mA “1010101” : 17.2 mA “0010110” : 4.6 mA “1010110” : 17.4 mA “0010111” : 4.8 mA “1010111” : 17.6 mA “0011000” : 5.0 mA “1011000” : 17.8 mA “0011001” : 5.2 mA “1011001” : 18.0 mA “0011010” : 5.4 mA “1011010” : 18.2 mA “0011011” : 5.6 mA “1011011” : 18.4 mA “0011100” : 5.8 mA “1011100” : 18.6 mA “0011101” : 6.0 mA “1011101” : 18.8 mA “0011110” : 6.2 mA “1011110” : 19.0 mA “0011111” : 6.4 mA “1011111” : 19.2 mA “0100000” : 6.6 mA “1100000” : 19.4 mA “0100001” : 6.8 mA “1100001” : 19.6 mA “0100010” : 7.0 mA “1100010” : 19.8 mA “0100011” : 7.2 mA “1100011” : 20.0 mA “0100100” : 7.4 mA “1100100” : 20.2 mA “0100101” : 7.6 mA “1100101” : 20.4 mA “0100110” : 7.8 mA “1100110” : 20.6 mA “0100111” : 8.0 mA “1100111” : 20.8 mA “0101000” : 8.2 mA “1101000” : 21.0 mA “0101001” : 8.4 mA “1101001” : 21.2 mA “0101010” : 8.6 mA “1101010” : 21.4 mA “0101011” : 8.8 mA “1101011” : 21.6 mA “0101100” : 9.0 mA “1101100” : 21.8 mA “0101101” : 9.2 mA “1101101” : 22.0 mA “0101110” : 9.4 mA “1101110” : 22.2 mA “0101111” : 9.6 mA “1101111” : 22.4 mA “0110000” : 9.8 mA “1110000” : 22.6 mA “0110001” : 10.0 mA “1110001” : 22.8 mA “0110010” : 10.2 mA “1110010” : 23.0 mA “0110011” : 10.4 mA “1110011” : 23.2 mA “0110100” : 10.6 mA “1110100” : 23.4 mA “0110101” : 10.8 mA “1110101” : 23.6 mA “0110110” : 11.0 mA “1110110” : 23.8 mA “0110111” : 11.2 mA “1110111” : 24.0 mA “0111000” : 11.4 mA “1111000” : 24.2 mA “0111001” : 11.6 mA “1111001” : 24.4 mA “0111010” : 11.8 mA “1111010” : 24.6 mA “0111011” : 12.0 mA “1111011” : 24.8 mA “0111100” : 12.2 mA “1111100” : 25.0 mA “0111101” : 12.4 mA “1111101” : 25.2 mA “0111110” : 12.6 mA “1111110” : 25.4 mA “0111111” : 12.8 mA “1111111” : 25.6 mA

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL Address 05h < LED6 Current setting(Independence control) > Address R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 05h W - IW6(6) IW6(5) IW6(4) IW 6(3) IW6(2) IW6(1) IW6(0) Initial Value 00h - 0 0 0 0 0 0 0 Bit7 : (Not used) Bit [6:0] : IW6 (6:0) L E D 6 Current setting “0000000” : 0.2 mA “1000000” : 13.0 mA “0000001” : 0.4 mA “1000001” : 13.2 mA “0000010” : 0.6 mA “1000010” : 13.4 mA “0000011” : 0.8 mA “1000011” : 13.6 mA “0000100” : 1.0 mA “1000100” : 13.8 mA “0000101” : 1.2 mA “1000101” : 14.0 mA “0000110” : 1.4 mA “1000110” : 14.2 mA “0000111” : 1.6 mA “1000111” : 14.4 mA “0001000” : 1.8 mA “1001000” : 14.6 mA “0001001” : 2.0 mA “1001001” : 14.8 mA “0001010” : 2.2 mA “1001010” : 15.0 mA “0001011” : 2.4 mA “1001011” : 15.2 mA “0001100” : 2.6 mA “1001100” : 15.4 mA “0001101” : 2.8 mA “1001101” : 15.6 mA “0001110” : 3.0 mA “1001110” : 15.8 mA “0001111” : 3.2 mA “1001111” : 16.0 mA “0010000” : 3.4 mA “1010000” : 16.2 mA “0010001” : 3.6 mA “1010001” : 16.4 mA “0010010” : 3.8 mA “1010010” : 16.6 mA “0010011” : 4.0 mA “1010011” : 16.8 mA “0010100” : 4.2 mA “1010100” : 17.0 mA “0010101” : 4.4 mA “1010101” : 17.2 mA “0010110” : 4.6 mA “1010110” : 17.4 mA “0010111” : 4.8 mA “1010111” : 17.6 mA “0011000” : 5.0 mA “1011000” : 17.8 mA “0011001” : 5.2 mA “1011001” : 18.0 mA “0011010” : 5.4 mA “1011010” : 18.2 mA “0011011” : 5.6 mA “1011011” : 18.4 mA “0011100” : 5.8 mA “1011100” : 18.6 mA “0011101” : 6.0 mA “1011101” : 18.8 mA “0011110” : 6.2 mA “1011110” : 19.0 mA “0011111” : 6.4 mA “1011111” : 19.2 mA “0100000” : 6.6 mA “1100000” : 19.4 mA “0100001” : 6.8 mA “1100001” : 19.6 mA “0100010” : 7.0 mA “1100010” : 19.8 mA “0100011” : 7.2 mA “1100011” : 20.0 mA “0100100” : 7.4 mA “1100100” : 20.2 mA “0100101” : 7.6 mA “1100101” : 20.4 mA “0100110” : 7.8 mA “1100110” : 20.6 mA “0100111” : 8.0 mA “1100111” : 20.8 mA “0101000” : 8.2 mA “1101000” : 21.0 mA “0101001” : 8.4 mA “1101001” : 21.2 mA “0101010” : 8.6 mA “1101010” : 21.4 mA “0101011” : 8.8 mA “1101011” : 21.6 mA “0101100” : 9.0 mA “1101100” : 21.8 mA “0101101” : 9.2 mA “1101101” : 22.0 mA “0101110” : 9.4 mA “1101110” : 22.2 mA “0101111” : 9.6 mA “1101111” : 22.4 mA “0110000” : 9.8 mA “1110000” : 22.6 mA “0110001” : 10.0 mA “1110001” : 22.8 mA “0110010” : 10.2 mA “1110010” : 23.0 mA “0110011” : 10.4 mA “1110011” : 23.2 mA “0110100” : 10.6 mA “1110100” : 23.4 mA “0110101” : 10.8 mA “1110101” : 23.6 mA “0110110” : 11.0 mA “1110110” : 23.8 mA “0110111” : 11.2 mA “1110111” : 24.0 mA “0111000” : 11.4 mA “1111000” : 24.2 mA “0111001” : 11.6 mA “1111001” : 24.4 mA “0111010” : 11.8 mA “1111010” : 24.6 mA “0111011” : 12.0 mA “1111011” : 24.8 mA “0111100” : 12.2 mA “1111100” : 25.0 mA “0111101” : 12.4 mA “1111101” : 25.2 mA “0111110” : 12.6 mA “1111110” : 25.4 mA “0111111” : 12.8 mA “1111111” : 25.6 mA

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL Address 06h < Main Current slope time setting > Address R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 06h W THL(3) THL(2) THL(1) THL(0) TLH(3) TLH(2) TLH(1) TLH(0) Initial Value C7h 1 1 0 0 0 1 1 1 Bit [7:4] : THL (3:0) Main LED current Down transition per 0.2mA step “0000” : 0.256 ms “0001” : 0.512 ms “0010” : 1.024 ms “0011” : 2.048 ms “0100” : 4.096 ms “0101” : 8.192 ms “0110” : 16.38 ms “0111” : 32.77 ms “1000” : 65.54 ms “1001” : 131.1 ms “1010” : 196.6 ms “1011” : 262.1 ms “1100” : 327.7 ms (Initial value) “1101” : 393.2 ms “1110” : 458.8 ms “1111” : 524.3 ms Setting time is counted based on the switching frequency of Charge Pump. The above value becomes the value of the Typ (1MHz) time. Refer to “(9) Slope Process” of “The explanation of ALC” for detail. Bit [3:0] : TLH (3:0) Main LED current Up transition per 0.2mA step “0000” : 0.256 ms “0001” : 0.512 ms “0010” : 1.024 ms “0011” : 2.048 ms “0100” : 4.096 ms “0101” : 8.192 ms “0110” : 16.38 ms “0111” : 32.77 ms (Initial value) “1000” : 65.54 ms “1001” : 131.1 ms “1010” : 196.6 ms “1011” : 262.1 ms “1100” : 327.7 ms “1101” : 393.2 ms “1110” : 458.8 ms “1111” : 524.3 ms Setting time is counted based on the switching frequency of Charge Pump. The above value becomes the value of the Typ (1MHz) time. Refer to “(9) Slope Process” of “The explanation of ALC” for detail.

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL Address 07h < ALC mode setting > Address R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 07h W ADCYC(1) ADCYC(0) GAIN(1) GAIN(0) STYPE VSB MDCIR SBIASON Initial Value 81h 1 0 0 0 0 0 0 1 Bit [7:6] : ADCYC(1:0) ADC Measurement Cycle “00” : 0.52 s “01” : 1.05 s “10” : 1.57 s (Initial value) “11” : 2.10 s Refer to “(4) A/D conversion” of “The explanation of ALC” for detail. Bit [5:4] : GAIN(1:0) Sensor Gain Switching Function Cont rol (This is effective only at STYPE=“0”.) “00” : Auto Change (Initial value) “01” : High “10” : Low “11” : Fixed Refer to “(3) Gain control” of “The explanation of ALC” for detail. Bit3 : STYPE Ambient Light Sensor Type Select (Linear/Logarithm) “0” : For Linear sensor (Initial value) “1” : For Log sensor Refer to “(7) Ambient level detection” of “The explanation of ALC” for detail. Bit2 : VSB SBIAS Output Voltage Control “0” : SBIAS output voltage 3.0V (Initial value) “1” : SBIAS output voltage 2.6V Refer to “(2) I/V conversion” of “The explanation of ALC” for detail. Bit1 : MDCIR LED Current Reset Select by Mode Change “0” : LED current non-reset when mode change (Initial value) “1” : LED current reset when mode change Refer to “(10) LED current reset when mode change” of “The explanation of ALC” for detail. Bit0 : SBIASON “0” : Measurement cycle synchronous “1” : Usually ON (at ALCEN=1) (Initial value) Refer to “(4) A/D conversion” of “The explanation of ALC” for detail.

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL Address 08h < ADC Data adjustment > Address R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 08h W SOFS(3) SOFS(2) SOFS(1) SOFS(0) SGAIN(3) SGAIN(2) SG AIN(1) SGAIN(0) Initial Value 00h 0 0 0 0 0 0 0 0 Bit [7:4] : SOFS (3:0) A D C Data O f f s e t adjustment “1000” : -8 LSB “1001” : -7 LSB “1010” : -6 LSB “1011” : -5 LSB “1100” : -4 LSB “1101” : -3 LSB “1110” : -2 LSB “1111” : -1 LSB “0000” : no adjustment “0001” : +1 LSB “0010” : +2 LSB “0011” : +3 LSB “0100” : +4 LSB “0101” : +5 LSB “0110” : +6 LSB “0111” : +7 LSB Offset adjust is performed to ADC data. Refer to “(5) ADC data Gain/offset adjustment” of “The explanation of ALC” for detail. Bit [3:0] : SGAIN (3:0) ADC Data Inclination adjustment “1000” : reserved “1001” : reserved “1010” : -37.50% “1011” : -31.25% “1100” : -25.00% “1101” : -18.75% “1110” : -12.50% “1111” : -6.25% “0000” : no adjustment “0001” : +6.25% “0010” : +12.50% “0011” : +18.75% “0100” : +25.00% “0101” : +31.25% “0110” : +37.50% “0111” : reserved Gain adjust is performed to ADC data. The data after adjustment are round off by 8-bit data. Refer to “(5) ADC data Gain/offset adjustment” of “The explanation of ALC” for detail.

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL Address 09h < Ambient level (Read Only) > Address R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 09h R - - - - AMB(3) AMB(2) AMB(1) AMB(0) Initial Bit [7:4] : (Not used) Bit [3:0] : AMB (3:0) Ambient Level “0000” : 0h “0001” : 1h “0010” : 2h “0011” : 3h “0100” : 4h “0101” : 5h “0110” : 6h “0111” : 7h “1000” : 8h “1001” : 9h “1010” : Ah “1011” : Bh “1100” : Ch “1101” : Dh “1110” : Eh “1111” : Fh It begins to read Ambient data through I2C, and possible. To the first AD measurement completion, it is AMB(3:0)=0000. Refer to “(7) Ambient level detection” of “The explanation of ALC” for detail.

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL Address 0Ah~19h < Ambient LED Current setting > Address R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 0Ah~19h W IU*(7) IU*(6) IU*(5) IU*( 4) IU*(3) IU*(2) IU*(1) IU*(0) Initial Value - Refer to after page for initial table. “*” means 0~F. Bit7 : (Not used) Bit [6:0] : IU* (6:0) Main Current at Ambient Level for 0h~Fh “0000000” : 0.2 mA “1000000” : 13.0 mA “0000001” : 0.4 mA “1000001” : 13.2 mA “0000010” : 0.6 mA “1000010” : 13.4 mA “0000011” : 0.8 mA “1000011” : 13.6 mA “0000100” : 1.0 mA “1000100” : 13.8 mA “0000101” : 1.2 mA “1000101” : 14.0 mA “0000110” : 1.4 mA “1000110” : 14.2 mA “0000111” : 1.6 mA “1000111” : 14.4 mA “0001000” : 1.8 mA “1001000” : 14.6 mA “0001001” : 2.0 mA “1001001” : 14.8 mA “0001010” : 2.2 mA “1001010” : 15.0 mA “0001011” : 2.4 mA “1001011” : 15.2 mA “0001100” : 2.6 mA “1001100” : 15.4 mA “0001101” : 2.8 mA “1001101” : 15.6 mA “0001110” : 3.0 mA “1001110” : 15.8 mA “0001111” : 3.2 mA “1001111” : 16.0 mA “0010000” : 3.4 mA “1010000” : 16.2 mA “0010001” : 3.6 mA “1010001” : 16.4 mA “0010010” : 3.8 mA “1010010” : 16.6 mA “0010011” : 4.0 mA “1010011” : 16.8 mA “0010100” : 4.2 mA “1010100” : 17.0 mA “0010101” : 4.4 mA “1010101” : 17.2 mA “0010110” : 4.6 mA “1010110” : 17.4 mA “0010111” : 4.8 mA “1010111” : 17.6 mA “0011000” : 5.0 mA “1011000” : 17.8 mA “0011001” : 5.2 mA “1011001” : 18.0 mA “0011010” : 5.4 mA “1011010” : 18.2 mA “0011011” : 5.6 mA “1011011” : 18.4 mA “0011100” : 5.8 mA “1011100” : 18.6 mA “0011101” : 6.0 mA “1011101” : 18.8 mA “0011110” : 6.2 mA “1011110” : 19.0 mA “0011111” : 6.4 mA “1011111” : 19.2 mA “0100000” : 6.6 mA “1100000” : 19.4 mA “0100001” : 6.8 mA “1100001” : 19.6 mA “0100010” : 7.0 mA “1100010” : 19.8 mA “0100011” : 7.2 mA “1100011” : 20.0 mA “0100100” : 7.4 mA “1100100” : 20.2 mA “0100101” : 7.6 mA “1100101” : 20.4 mA “0100110” : 7.8 mA “1100110” : 20.6 mA “0100111” : 8.0 mA “1100111” : 20.8 mA “0101000” : 8.2 mA “1101000” : 21.0 mA “0101001” : 8.4 mA “1101001” : 21.2 mA “0101010” : 8.6 mA “1101010” : 21.4 mA “0101011” : 8.8 mA “1101011” : 21.6 mA “0101100” : 9.0 mA “1101100” : 21.8 mA “0101101” : 9.2 mA “1101101” : 22.0 mA “0101110” : 9.4 mA “1101110” : 22.2 mA “0101111” : 9.6 mA “1101111” : 22.4 mA “0110000” : 9.8 mA “1110000” : 22.6 mA “0110001” : 10.0 mA “1110001” : 22.8 mA “0110010” : 10.2 mA “1110010” : 23.0 mA “0110011” : 10.4 mA “1110011” : 23.2 mA “0110100” : 10.6 mA “1110100” : 23.4 mA “0110101” : 10.8 mA “1110101” : 23.6 mA “0110110” : 11.0 mA “1110110” : 23.8 mA “0110111” : 11.2 mA “1110111” : 24.0 mA “0111000” : 11.4 mA “1111000” : 24.2 mA “0111001” : 11.6 mA “1111001” : 24.4 mA “0111010” : 11.8 mA “1111010” : 24.6 mA “0111011” : 12.0 mA “1111011” : 24.8 mA “0111100” : 12.2 mA “1111100” : 25.0 mA “0111101” : 12.4 mA “1111101” : 25.2 mA “0111110” : 12.6 mA “1111110” : 25.4 mA “0111111” : 12.8 mA “1111111” : 25.6 mA

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL Address 1Ah < Key Driver 2 value decision control setting > Address R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 1Ah W - - CHYS(1) CHYS(0) CTH(3) CTH(2) CTH(1) CTH(0) Initial Value 2Ah - - 1 0 1 0 1 0 Bit [7:6] : (Not used) Bit [5:4] : CHYS(1:0) Key DriverON Brightness hysteresis “00” : Ambient 1h Width “01” : Ambient 2h Width “10” : Ambient 3h Width (initial) “11” : Ambient 4h Width Refer to “(12) Key back light value decision” of “The explanation of ALC” for detail. Bit [3:0] : CTH (3:0) Key DriverOFF Brightness threshold “0000” : Ambient level 0h OFF “0001” : Ambient level 1h OFF “0010” : Ambient level 2h OFF “0011” : Ambient level 3h OFF “0100” : Ambient level 4h OFF “0101” : Ambient level 5h OFF “0110” : Ambient level 6h OFF “0111” : Ambient level 7h OFF “1000” : Ambient level 8h OFF “1001” : Ambient level 9h OFF “1010” : Ambient level Ah OFF (initial) “1011” : Ambient level Bh OFF “1100” : Ambient level Ch OFF “1101” : Ambient level Dh OFF “1110” : Ambient level Eh OFF “1111” : Ambient level Fh OFF Refer to “(12) Key back light value decision” of “The explanation of ALC” for detail.

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL Address 1Bh < OUT KEY Output Mode setting > Address R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 1Bh W - - - KBMD OUT4MD OUT3MD OUT2MD OUT1MD Initial Value 00h - - - 0 0 0 0 0 Bit [7:5] : (Not used) Bit4 : KBMD Key back light mode choice (ALC/ Individual) “0” : KBLT ALC Control “1” : KBLT Individual Control Refer to “(13) Key back light PWM control” of “The explanation of “ ALC” for detail. Bit3 : OUT4MD OUTCNT External Control setting “0” : OUTCNT invalid, OUT4 output depends on output control by OUT4EN. “1” : OUT4 output depends on output control by OUT4EN with OUTCNT=H. With OUTCNT=L, OUT4=Hi-z (compulsory off). Refer to “The explanation of OUTPWM control” for detail. Bit2 : OUT3MD OUTCNT External Control setting “0” : OUTCNT invalid, OUT3 output depends on output control by OUT3EN. “1” : OUT3 output depends on output control by OUT3EN with OUTCNT=H. With OUTCNT=L, OUT3=Hi-z (compulsory off). Refer to “The explanation of OUTPWM control” for detail. Bit1 : OUT2MD OUTCNT External Control setting “0” : OUTCNT invalid, OUT2 output depends on output control by OUT2EN. “1” : OUT2 output depends on output control by OUT2EN with OUTCNT=H. With OUTCNT=L, OUT2=Hi-z (compulsory off). Refer to “The explanation of OUTPWM control” for detail. Bit0 : OUT1MD OUTCNT External Control setting “0” : OUTCNT invalid, OUT1 output depends on output control by OUT1EN. “1” : OUT1 output depends on output control by OUT1EN with OUTCNT=H. With OUTCNT=L, OUT1=Hi-z (compulsory off). Refer to “The explanation of OUTPWM control” for detail.

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL Address 1Ch < OUT KEY Output level setting > Address R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 1Ch W/R - - - KBEN OUT4EN OUT3EN OUT2EN OUT1EN Initial Value 00h - - - 0 0 0 0 0 Bit [7:5] : (Not used) Bit4 : KBEN KBLT output level setting (non-ALC mode) “0” : KBLT L 出力 “1” : KBLT H 出力 Refer to “(13) Key back light PWM control” of “The explanation of ALC” for detail. Bit3 : OUT4EN OUT4 Output level setting “0” : OUT4 Hi-Z Output “1” : OUT4 L Output Refer to “The explanation of OUTPWM control” for detail. Bit2 : OUT3EN OUT3 Output level setting “0” : OUT3 Hi-Z Output “1” : OUT3 L Output Refer to “The explanation of OUTPWM control” for detail. Bit1 : OUT2EN OUT2 Output level setting “0” : OUT2 Hi-Z Output “1” : OUT2 L Output Refer to “The explanation of OUTPWM control” for detail.. Bit0 : OUT1EN OUT1Output level setting “0” : OUT1 Hi-Z Output “1” : OUT1 L Output Refer to “The explanation of OUTPWM control” for detail.

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL Address 1Dh < OUT KEY Output Mode setting > Address R/W Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 1Dh W FPWM - - - KBSLP (1) KBSLP (0) OUTSLP(1) OUTSLP(0) Initial Value 00h 0 - - - 0 0 0 0 Bit7 : FPWM Key Driver, OUT1～4 PWM cycle setting “0” : 2.048 ms “1” : 4.096 ms Refer to “(13) Key back light PWM control” of “The explanation of ALC” and “The explanation of OUTPWM control” for detail. Bit [6:4] : ( 未使用) Bit [3:2] : KBSLP(1:0) The slope time of around 1step for Key Driver PWM FPWM=0 FPWM=1 “00” : 0.00 ms 0.00 ms “01” : 16.38 ms 32.77 ms “10” : 32.77 ms 65.54 ms “11” : 65.54 ms 131.08 ms Refer to “(13) Key back light PWM control” of “The explanation of ALC” for detail. Bit [1:0] : OUTSLP(1:0) The slope time of around 1step for OUT1 ～4 PWM FPWM=0 FPWM=1 “00” : 0.00 ms 0.00 ms “01” : 16.38 ms 32.77 ms “10” : 32.77 ms 65.54 ms “11” : 65.54 ms 131.08 ms Refer to “The explanation of OUTPWM control” for detail.

Reset There are two kinds of reset, software reset and hardware reset (1) Software reset ・All the registers are initialized by SFTRST="1". ・SFTRST is an automatically returned to "0". (Auto Return 0). (2) Hardware reset ・It shifts to hardware reset by changing RESETB pin “H” → “L”. ・The condition of all the registers under hardware reset pin is returned to the initial value, and it stops accepting all address. ・It’s possible to release from a state of hardware reset by changing RESETB pin “L” → “H”. ・RESETB pin has delay circuit. It doesn’t recognize as hardware reset in “L” period under 5μs. (3) Reset Sequence ・When hardware reset was done during software reset, software reset is canceled when hardware reset is canceled. (Because the initial value of software reset is “0”)
VIODET The decline of the VIO voltage is detected, and faulty operation inside the LSI is prevented by giving resetting to Levelsift block Image Block Diagram VIO VBAT RESETB VIODET Digital pin LEVEL SHIFT I/O R DEToutput Inside reset VIO VBAT RESETB DET output Inside reset 2.6V (typ)1.0V Reset by VIODET When the VIO voltage becomes more than typ1.0V(Vth of NMOS in the IC), VIODET is removed. On the contrary, when VIO is as follows 1.0V, it takes reset.(The VBAT voltage being a prescribed movement range)
thermal shutdown A thermal shutdown function is effective in the following block. DC/DC (Charge Pump) LED Driver SBIAS The thermal shutdown function is detection temperature that it works is about 195 Detection temperature has a hysteresis, and detection release temperature is about 175 oC. (Design reference value)

DC/DC Explanation for operate Start DC/DC circuit operates when any LED turns ON. (DCDCFON=0) When the start of theDC/DC circuit is done, it has the soft start function to prevent a rush current. Force of VBAT and VIO is to go as follows. DCDCMD=1 must be set in the fixed voltage mode and DCDCMD=DCDCFON=1 must be set when DCDC output takes place regardless of LEDs. EN (*) VIO VOUT RESETB VBAT TVIOON=min 0.1ms TRSTB=min 0.1ms TSOFT LEDcurrent TRST=min 0ms TVIOOFF=min 0.1ms (*) An EN signal means the following in the upper figure. (= LED The LED lighting control of a setup of connection VOUT) But, as for Ta > TTSD (typ : 195° C), a protection function functions, and an EN signal doesn't become effective. TSOFT changes by the capacitor connected to VOUT and inside OSC. TSOFT is Typ 200μs (when the output capacitor of VOUT =1.0μF). Over Voltage protection / Over Current protection DC/DC circuit output (VOUT) is equipped with the over-voltage protection and the over current protection function. A VOUT over-voltage detection voltage is about 6.0V(typ). (VOUT at the time of rise in a voltage) A detection voltage has a hysteresis, and a detection release voltage is about 5.1V(typ). And, when VOUT output short to ground, input current of the battery terminal is limited by an over current protection function.

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL Mode transition The transition of boosts multiple transits automatically by VBAT Voltage and the VOUT Pin Voltage. The mode transition of the charge pump works as follows. ＜x1.0→x1.5→x2.0 Mode transition＞ The transition of the mode is done when VOUT was compared with VBAT and the next condition was satisfied. x1.0 →x1.5 Mode transition VBAT ≤ VOUT + (Ron10×Iout) (LED Pin feedback ：VOUT = Vf+0.2(Typ)) x1.5 →x2.0 Mode transition VBAT×1.5 ≤ VOUT +(Ron15×Iout) (LED Pin feedback ：VOUT = Vf+0.2(Typ)) Ron10: x1 Charge pump on resistance 1.2 Ω(Typ) Ron15: x1.5 Charge pump on resistance 7.1 Ω(Typ) ＜x2.0→x1.5→x1.0 Mode transition＞ The transition of the mode is done when the ratio of VOUT and VBAT is detected and it exceeds a fixed voltage ratio. x1.5 →x1.0 Mode transition VBAT / VOUT =1.16(Design value) x2.0 →x1.5 Mode transition VBAT / VOUT =1.12(Design value) STANDBY SOFT ALL off and Ta<TTSD CP x1.0 mode After detecting VOUT>1.5V(typ), 128us(typ) wait X1.0 CP x1.0 mode mode up=”H” mode down=”H” X1.5 CP x1.5 mode mode up=”H” mode down=”H” X2.0 CP x2.0 mode condition○1

LED Driver The LED driver of 6ch is constructed as the ground plan. Equivalence control is possible with LED1 - 4(LED4 can choose use/un-use with a register W4MD.). LED5, LED6 is controllable individually. As for LED5, LED6, grouping setting to the main control is possible, and main control becomes effective for the main group in the allotment. LED5 and LED6 are setups of grouping to the main control. When LED5 and LED6 are used by the individual control, a slope time setup (register THL and TLH) doesn't become effective.
General-purpose Output Ports General-purpose Output Ports 4ch is constructed as the ground plan. W5MD W6MD IMLED[6:0] MLEDEN MLEDMD IW5[6:0] W5EN IW6[6:0] W6EN LED1 LED2 LED3 LED4 LED5 LED6 WPWMIN W4MD OUT* VGPO When OUT* is used with Pull Up. OUT* VLED When OUT* is used with LED. Vf GPO Slope Control GPO Slope Control

The explanation of ALC (Auto Luminous Control) LCD backlight current adjustment is possible in the basis of the data detected by external ambient light sensor. ・Extensive selection of the ambient light sensors (Photo Diode, Photo Transistor, Photo IC(linear/logarithm)) is possible by building adjustment feature of Sensor bias, gain adjustment and offset adjustment. ・Ambient data is changed into ambient level by digital data processing, and it can be read through I2C I/F. ・Register setting can customize a conversion to LED current. (Initial value is pre-set.) ・ Natural dimming of LED driver is possible with the adjustment of the current transition speed. ・ON/ off of the key back light can be controlled automatically by the brightness. ADC Average Logarithmic Conv. Ambient Level Current Conversion Slope process SBIAS Gain Control Usually ON / intermittent Sensor Offset Correction Conversion Slope Timer Gain Control ON/OFF Ambient Level LCD Backlight SSENS SBIAS GC1 GC2 LIN/LOG LED* Sensor Sensor Gain Correction Data Correction : Effective also in ALC functional the case of not using it WPWMIN Mode Select PWM enabling DC current setup Threshold 2 value decision Hysteresis VBAT KBLT Key Backlight Slope Timer PWM process PWM Cycle PWM Polarity switching Mode Select Main Group setup (1) Auto Luminous Control ON/OFF ・ALC block can be independent setting ON/OFF. ・It can use only to measure the Ambient level. Register : ALCEN Register : MLEDEN Register : MLEDMD ・Refer to under about the associate ALC mode and Main LED current. ALCEN MLEDEN MLEDMD Sensor I/F LED control Mode Main LED current 0 0 x OFF ( AMB(3:0)=0h ) OFF OFF - 0 1 0 ON Non ALC mode IMLED(6:0) 1 0 x ON OFF ALC mode 1 1 0 ON IMLED(6:0) 1 1 1 ALC mode (*2) (*1) At this mode, because Sensor I/F is OFF, AMB(3:0)=0h. S o , M a i n L E D c u r r e n t i s s e l e c t e d I U 0 ( 6 : 0 ) . (*2) At this mode, Main LED current is selected IU0(6:0)~IUF(6:0) It becomes current value corresponding to each brightness.

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL (2) I/V conversion ・The bias voltage and external resistance for the I-V conversion (Rs) are adjusted with adaptation of sensor characteristic ・The bias voltage is selectable by register setup. Register : VSB “0” : SBIAS output voltage 3.0V “1” : SBIAS output voltage 2.6V Rs : Sense resistance (A sensor output current is changed into the voltage value.) SBIAS : Bias power supply terminal for the sensor (3.0V / 2.6V by register setting) SSENS : Sense voltage input terminal SSENS Voltage = Iout x Rs Ambient Sensor Current (Iout) Ambient SSENS Voltage (=Iout x Rs) Rs is large Rs is small SBIAS A/D Sensor IC SBIAS SSENS SGND VCC GND IOUT BD6088GUL Rs Iout VSSENS SSENS voltage

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL (3) Gain control ・Sensor gain switching function is built in to extend the dynamic range. ・It is controlled by register setup. ・When automatic gain control is off, the gain status can be set upin the manual. Register : GAIN(1:0) ・GC1 and GC2 are outputted corresponding to each gain status. Example 1 (Use BH1600FVC) Example 2 Example 3 Applicationexample Resister values are relative Operating mode Auto Manual Auto Manual Fixed High Low High Low GAIN(1:0) setting 00 01 10 00 01 10 11 Gain status High Low High Low High Low High Low - GC1 output L L L L GC2 output L L L L L : This means that it becomes High with A/D measurement cycle synchronously. (*1) : Set up the relative ratio of the resistance in the difference in the brightness change of the High Gain mode and the Lo w Gain mode carefully. SSENS SBIAS GC1 GC2 SGND 9.5 (*1) SSENS SBIAS GC1 GC2 SGND IOUT GC1 GC2GND VCC BH1600 SSENS SBIAS GC1 GC2 SGND Ambient SSENS Voltage Low Gain mode High Gain mode Ambient SSENS Voltage Auto Gain mode

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL (4) A/D conversion ・The detection of ambient data is done periodically for the low power. ・SBIAS and ADC are turned off except for the ambient measurement. ・The sensor current may be shut in this function, it can possible to decrease the current consumption. ・SBIAS pin and SSENS pin are pull-down in internal when there are OFF. ・SBIAS circuit has the two modes. (Usually ON mode or intermittent mode) Register : ADCYC(1:0) Register : SBIASON (5) ADC data Gain / offset adjustment ・To correct the characteristic dispersion of the sensor, Gain and offset adjustment to ADC output data is possible. ・They are controlled by register setup. Register : SGAIN(3:0) Register : SOFS(3:0) < Gain Adjustment > < Offset Adjustment > ADC Cycle SBIAS Output ADC Movement ALCEN AMB(3:0) TAD= 16.4ms(typ) AMB(3:0) ADCYC(1:0) Twait= 64ms(typ) When SBIASON=1 GC1, GC2 GC1, GC2=00 Toprt= 80.4ms(typ) AD start signal TADone= 1.024ms(typ) 16 times measurement (Wait time) (A/D conversion time) (Operate time) 16 times Ambient SSENS Voltage Ambient SSENS Voltage Gain adjustment SGAIN(3:0) Ambient SSENS Voltage Ambient SSENS Voltage Ambient SSENS Voltage Ambient SSENS Voltage Offset adjustment SOFS(3:0)

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL (6) Average filter ・Average filter is built in to rid noise or flicker. ・Average is 16 times (7) Ambient level detection ・Averaged A/D value is converted to Ambient level corresponding to Gain control and sensor type. ・Ambient level is judged to rank of 16 steps by ambient data. ・The type of ambient light sensor can be chosen by register. (Linear type sensor / Logarithm type sensor) Register : STYPE “0” : For Linear sensor “1” : For Log sensor ・Ambient level is output through I2C. Register : AMB(3:0) STYPE 0 1 GAIN(1:0) 00 10 01 11 xx GAIN Low High Low High - - Ambient Level SSENS Voltage VoS×0/256 VoS×0/256 VoS×0/256 VoS×0/256 VoS×17/256 1h VoS×1/256 VoS×1/256 VoS×1/256 VoS×18/256 VoS×26/256 2h VoS×2/256 VoS×2/256 VoS×2/256 VoS×27/256 VoS×36/256 3h VoS×3/256 VoS×4/256 VoS×3/256 VoS×4/256 VoS×3/256 VoS×4/256 VoS×37/256 VoS×47/256 4h VoS×5/256 VoS×7/256 VoS×5/256 VoS×7/256 VoS×5/256 VoS×6/256 VoS×48/256 VoS×59/256 5h VoS×0/256 VoS×8/256 VoS×12/256 VoS×0/256 VoS×8/256 VoS×12/256 VoS×7/256 VoS×9/256 VoS×60/256 VoS×71/256 6h VoS×1/256 VoS×13/256 VoS×21/256 VoS×1/256 VoS×13/256 VoS×21/256 VoS×10/256 VoS×13/256 VoS×72/256 VoS×83/256 7h VoS×2/256 VoS×3/256 VoS×22/256 VoS×37/256 VoS×2/256 VoS×3/256 VoS×22/256 VoS×37/256 VoS×14/256 VoS×19/256 VoS×84/256 VoS×95/256 8h VoS×4/256 VoS×6/256 VoS×38/256 VoS×65/256 VoS×4/256 VoS×6/256 VoS×38/256 VoS×65/256 VoS×20/256 VoS×27/256 VoS×96/256 VoS×107/256 9h VoS×7/256 VoS×11/256 VoS×66/256 VoS×113/256 VoS×7/256 VoS×11/256 VoS×66/256 VoS×113/256 VoS×28/256 VoS×38/256 VoS×108/256 VoS×119/256 Ah VoS×12/256 VoS×20/256 VoS×114/256 VoS×199/256 VoS×12/256 VoS×20/256 VoS×114/256 VoS×199/256 VoS×39/256 VoS×53/256 VoS×120/256 VoS×131/256 Bh VoS×21/256 VoS×36/256 VoS×200/256 VoS×255/256 VoS×21/256 VoS×36/256 VoS×200/256 VoS×255/256 VoS×54/256 VoS×74/256 VoS×132/256 VoS×143/256 Ch VoS×37/256 VoS×64/256 VoS×37/256 VoS×64/256 VoS×75/256 VoS×104/256 VoS×144/256 VoS×155/256 Dh VoS×65/256 VoS×114/256 VoS×65/256 VoS×114/256 VoS×105/256 VoS×144/256 VoS×156/256 VoS×168/256 Eh VoS×115/256 VoS×199/256 VoS×115/256 VoS×199/256 VoS×145/256 VoS×199/256 VoS×169/256 VoS×181/256 Fh VoS×200/256 VoS×255/256 VoS×200/256 VoS×255/256 VoS×200/256 VoS×255/256 VoS×182/256 VoS×255/256 ・This is in case of not adjustments of the gain/offset control. ・In the Auto Gain control mode, sensor gain changes in gray-colored ambient level. ・“ ⁄ ” : This means that this zone is not outputted in this mode.

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL (8) LED current assignment ・LED current can be assigned as each of 16 steps of the ambient level. ・Setting of a user can do by overwriting, though it prepares for the table setup in advance. Register : IU*(6:0) Conversion Table (initial value) Ambient Level Setting data Current value Ambient Level Setting data Current value 0h 11h 3.6mA 8h 48h 14.6mA 1h 13h 4.0mA 9h 56h 17.4mA 2h 15h 4.4mA Ah 5Fh 19.2mA 3h 18h 5.0mA Bh 63h 20.0mA 4h 1Eh 6.2mA Ch 63h 20.0mA 5h 25h 7.6mA Dh 63h 20.0mA 6h 2Fh 9.6mA Eh 63h 20.0mA 7h 3Bh 12.0mA Fh 63h 20.0mA (9) Slope process ・Slope process is given to LED current to dim naturally. ・LED current changes in the 256Step gradation in sloping. ・Up(dark→bright),Down(bright→dark) LED current transition speed are set individually. Register : THL(3:0) Register : TLH(3:0) ・Main LED current changes as follows at the time as the slope. TLH (THL) is setup of time of the current step 2/256. Ambient Level Main LED current Conversion table can be changed Zoom time Main LED current TLH(3:0) 25.6mA 256 TLH THL=0.1mA time Main LED current Current Data which is set LED Current Up/Down transition Speed is set individually TLH(3:0) THL (3:0)

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL (10) LED current reset when mode change ・When mode is changed (ALC↔Non ALC), it can select the way to sloping. Register : MDCIR “0” : LED current non-reset when mode change “1” : LED current reset when mode change (11) Current adjustment ・When the register setting permits it, PWM drive by the external terminal (WPWMIN) is possible. B it Name : WPWMEN ・It is suitable for the intensity correction by external control, because PWM based on Main LED current of register setup or ALC control. WPWMEN (Register) WPWMIN(External Pin) Main group LED current WPWMPOL=H (Register) WPWMPOL=L (Register)

0 L H Normal operation

1 L H Forced OFF

" N o r m a l o p e r a t i o n " d e p e n d s o n t h e s e t u p o f e a c h r e g i s t e r . time Main LED current MDCIR= “0” 0mA NonALC mode NonALC mode ALC mode IMLED(6:0) IMLED(6:0) IU*(6:0) EN( *) DC/ DC Out put WP WMI N i n p u t WP WME N LED Cur r ent Internal S oft-Start Tim e E N (*) : it m eans “M LE D E N ” or “W *E N ”. It is possible to m ake it a W PW M IN input and W PW M E N =1 in front of EN (*). A PW M dri ve becomes ef fecti ve af ter the ti m e of an LED current standup. W hen ri si ng during PW M operati on, as for the standup ti m e of a DC/DC output, onl y the rate of PW M Duty becom es l ate. Appearance m ay be i nfluenced when extrem el y l ate frequency and extrem el y l ow Duty are i nputted. Pl ease secure 80 μs or more of H secti ons at the ti m e of PW M pul se Force. time Main LED current NonALC mode MDCIR= “1” 0mA NonALC mode ALC mode IMLED(6:0) IMLED(6:0) IU*(6:0)

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL (12) Key back light 2-value decision ・Capable of comparing luminosity factor data with judgment threshold value with a hysteresis to determine binary judgment for illumination intensity. ・Available for key backlight ON/OFF control based on illumination intensity. ・Sets a threshold value and a hystresis via the registers. Bit Name : CTH(3:0) Bit Name : CHYS(1:0) The threshold value and hystresis must meet the following condition: CTH setting  CHYS setting Example: The backlight turns on with an illumination intensity of 7 and turns off with an illumination intensity of 5. CTH[3:0]=7h CHYS[1:0]=1h (13) Key back light PWM control ・Outputs ON or OFF for binary judgment via the KBLT terminal after PWM processing. ・Allows a slope time to be set in the register via PWM. 32 levels of duties prepared as MAX Duty are sequentially stepped at KBSLP time intervals. Bit name: KBSLP(1:0) ・A PWM cycle can choose 2 value. Bit name: FPWM ・It can be changed to the single control by the following setup of a register. The KBSLP(1:0), FPWM setting is effective. KBMD KBEN KBLT output 0 - Depend on ALC setting 1 0 0 1 1 ・32 levels Duty ratio (H level section) becomes the following set point. Step Duty(%) Step Duty(%) 0 0.00 16 25.00 1 1.56 17 28.13 2 3.13 18 31.25 3 4.69 19 34.38 4 6.25 20 37.50 5 7.81 21 40.63 6 9.38 22 45.31 7 10.94 23 50.00 8 12.50 24 56.25 9 14.06 25 62.50 10 15.63 26 68.75 11 17.19 27 75.00 12 18.75 28 81.25 13 20.31 29 87.50 14 21.88 30 93.75 15 23.44 31 100.00 Ambient Level Key Back Light ON/OFFControl ON OFF Detect threshold level, Hysteresis setup is possible 100 0 5 10 15 20 25 30 The num ber of st ep' s D u ty ra tio (% )

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL t= time per 1step×32 Step Duty=1.56%(At the time of step 1) FPWM KBLT 0 1 Expansion OUTSLP(1:0) Duty=93.75%(At the time of step 30) KBEN OFF KBEN ｔ Expansion KBLT DUT Y

OUT PWM Control ・PWM A fixed signal is output from OUT1 ~ 4 terminal. ・Allows a slope time to be set in the register via PWM. 32 levels of duties prepared as MAX Duty are sequentially stepped at OUTSLP time intervals. Bit name: OUTSLP(1:0) ・A PWM cycle can choose 2 value. Bit name: FPWM ・Forced OFF is made with an OUTCNT terminal. Bit name: OUT*MD OUT*MD OUT*EN OUTCNT OUT* 出力 0 0 - After the PWM slope, Hi-z (Duty 0%) 1 - After the PWM slope, L (Duty 100%) 0 0 Hi-z (LED is compulsory lights off)

1 Hi-z(Duty0%) *1

1 0 Hi-z (LED is compulsory lights off

1 L (Duty100%) *

*1 But, Duty in the middle of the PWM slope is output at the time as the PWM slope by OUT*EN. OUT*EN PWM Slope circuit OUTCNT OUT*MD OUT*

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL ①Setup of a slope (Except for OUTSLP [1:0] =00h) OUT*MD OUT*EN OUTCNT OUT*DUTY Slope by OUTCNT is nothing. (It is done ON/OFF promptly.) Duty(100%) Duty(0%) Lights off (Hi-z) Lights on(L) OUT* terminal PWM operate OUT*DUTY show the H section of the output step NMOS gate. (Duty 0%~100 %) ②Slope setup nothing (OUTSLP[1:0]=00h) OUT*MD OUT*EN OUTCNT OUT*DUTY Light off (Hi-z) Light on(L) OUT* terminal Duty(100%) Duty(0%) OUT*DUTY shows the H section of the output step NMOS gate. (Duty 0%~100%)

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL ・32 levels Duty ratio (H level section) becomes the following set point. Step Duty(%) Step Duty(%) 0 0.00 16 25.00 1 1.56 17 28.13 2 3.13 18 31.25 3 4.69 19 34.38 4 6.25 20 37.50 5 7.81 21 40.63 6 9.38 22 45.31 7 10.94 23 50.00 8 12.50 24 56.25 9 14.06 25 62.50 10 15.63 26 68.75 11 17.19 27 75.00 12 18.75 28 81.25 13 20.31 29 87.50 14 21.88 30 93.75 15 23.44 31 100.00 t= tim e per 1step×32 Step Duty=1.56%(At the time of step 1) FPWM OUT* 0 1 Expansion OUTSLP(1:0) Duty=93.75%(At the time of step 32) OUT*EN OFF OUT*EN ｔ Expansion OUT*DUTY 100 0 5 10 15 20 25 30 The num ber of st ep' s D u ty ra tio (% )

I/O When the RESETB pin is Low, the input buffers (SDA and SCL) are disabling for the Low consumption power. Level shifter Logic When RESETB=L, output is fixed at “H.” EN SCL (SDA) RESETB Special care should be taken because a current path may be formed via a terminal protection diode, depending on an I/O power-on sequence or an input level.
About the pin management of the function that isn't used and test pins Setting it as follows is recommended with the test pin and the pin which isn't used. Set up pin referring to the “Equivalent circuit diagram” so that there may not be a problem under the actual use. T1 Short to GND because pin for test GND T2, T4 Short to GND because pin for test input T3 OPEN because pin for test output Non-used LED Pin Short to GND (Must) But, the setup of a register concerned with LED that isn’t used is prohibited. WPWMIN, OUTCNT Short to ground (A Pull-Down resistance built-in terminal is contained, too.) OUT1～4 It opens for an output KBLT Although Pull-Down is built in, it opens for an output.

Operation Settings (Flow Example) 1. Backlight: Auto luminous Mode When It cannot wait for the first illumination measurement, backlight lighting is possible with ALCEN. But the extremely short case of slope rise time, a shoulder may be done like ① for an LED electric current. (To the first illumination measurement for AMB(3:0)=00h) 2. Backlight: Fade-in/Fade-out ADC Cycle SBIAS Output ADC Movement ALCEN AMB(3:0) TAD= 16.4ms(typ) AMB(3:0) ADCYC(1:0) Twait= 64ms(typ) W hen SBIASON=1 GC1, GC2 GC1, GC2=00 TAMB= 80.4ms(typ) VOUT LED current TSOFT Apply supply voltage. Cancel reset. Luminous control: Various settings Backlight: Various settings ALCEN=1 ALC block operation takes place for Illumination Intensity measurement. The backlight settings can be made at any timing so long as it precedes MLEDEN=1. MLEDMD=1 is mandatory. MLEDEN=1 The backlight turns on. MLEDEN=0 must be set first when the backlight is off. Wait for 80.4 ms or more Time required for initial Illumination Intensity acquisition. Apply supply voltage. Cancel reset. Backlight: Various settings Backlight setting. Slow time setting. MLEDEN=1 The backlight turns on. (Rise at designated slope time) (Rise at designated slope time) Set the minimum current. MLEDEN=0 The backlight turns off.

www.rohm.com 2011.04 - Rev. A © 2011 ROHM Co., Ltd. All rights reserved. BD6088GUL 3. Backlight: Un-auto luminous Mode MLEDEN VOUT LED current TSOFT The rise time depends on TLH(3:0) setting Apply supply voltage. Cancel reset. Backlight: Various settings MLEDEN=1 The backlight turns on. The backlight settings can be made at any timing so long as it precedes MLEDEN=1. MLEDMD=0 is mandatory. MLEDEN=0 must be set first when the backlight is off.

PCB pattern of the Power dissipation measuring board 1st layer(component) 2nd layer 3rd layer 4th layer 5th layer 6th layer 7th layer 8th layer(solder)

Notes for use (1) Absolute Maximum Ratings An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down devices, thus making impossible to identify breaki ng mode such as a short circuit or an open circuit. If any special mode exceeding the absolute maximum ratings is assumed, consideration should be given to take physical safety measures including the use of fuses, etc. (2) Power supply and ground line Design PCB pattern to provide low impedance for the wiring between the power supply and the ground lines. Pay attention to the interference by common impedance of layout pattern when there are plural power supplies and ground lines. Especially, when there are ground pattern for small signal and ground pattern for large current included the external circuits, please separate each ground pattern. Furthermore, for all power supply pins to ICs, mount a capacitor between the power supply and the ground pin. At the same time, in order to use a capacitor, thoroughly check to be sure the characteristics of the capacitor to be used present no problem including the occurrence of capacity dropout at a low temperature, thus determining the constant. (3) Ground voltage Make setting of the potential of the ground pin so that it will be maintained at the minimum in any operating state. Furthermore, check to be sure no pins are at a potential lower than the ground voltage including an actual electric transient. (4) Short circuit between pins and erroneous mounting In order to mount ICs on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting can break down the ICs. Furthermore, if a short circuit occurs due to foreign matters entering between pins or between the pin and the power supply or the ground pin, the ICs can break down. (5) Operation in strong electromagnetic field Be noted that using ICs in the strong electromagnetic field can malfunction them. (6) Input pins In terms of the construction of IC, parasitic elements are inevitably formed in relation to potential. The operation of the parasitic element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of the input pin. Therefore, pay thorough attention not to handle the input pins, such as to apply to the input pins a voltage lower than the ground respectively, so that any parasitic element will operate. Furthermore, do not apply a voltage to the input pins when no power supply voltage is applied to the IC. In addition, even if the power supply voltage is applied, apply to the input pins a voltage lower than the power supply voltage or within the guaranteed value of electrical characteristics. (7) External capacitor In order to use a ceramic capacitor as the external capacitor, determine the constant with consideration given to a degradation in the nominal capacitance due to DC bias and changes in the capacitance due to temperature, etc. (8) Thermal shutdown circuit (TSD) This LSI builds in a thermal shutdown (TSD) circuit. When junction temperatures become detection temperature or higher, the thermal shutdown circuit operates and turns a switch OFF. The thermal shutdown circuit, which is aimed at isolating the LSI from thermal runaway as much as possible, is not aimed at the protection or guarantee of the LSI. Therefore, do not continuously use the LSI with this circuit operating or use the LSI assuming its operation. (9) Thermal design Perform thermal design in which there are adequate margins by taking into account the permissible dissipation (Pd) in actual states of use. (10) LDO Use each output of LDO by the independence. Don’t use under the condition that each output is short-circuited because it has the possibility that an operation becomes unstable. (11) About the pin for the test, the un-use pin Prevent a problem from being in the pin for the test and the un-use pin under the state of actual use. Please refer to a function manual and an application notebook. And, as for the pin that doesn't specially have an explanation, ask our company person in charge. (12) About the rush current For ICs with more than one power supply, it is possible that rush current may flow instantaneously due to the internal powering sequence and delays. Therefore, give special consideration to power coupling capacitance, power wiring, width of ground wiring, and routing of wiring. (13) About the function description or application note or more. The function description and the application notebook are the design materials to design a set. So, the contents of the materials aren't always guaranteed. Please design application by having fully examination and evaluation include the external elements.

Power dissipation (On the ROHM’s standard board) Information of the ROHM’s standard board Material : glass-epoxy Size : 50mm×58mm×1.75mm( 8th layer) Wiring pattern figure Refer to after page. 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 0 25 50 75 100 125 150 Ta（℃） Power Dissipation Pd （W) 1380mW

Ordering part number B D 6 0 8 8 GU L - E 2 Part No. Part No. 6088 Package GUL : VCSP50L3 Packaging and forming specification E2: Embossed tape and reel (Unit : mm) VCSP50L3(BD6088GUL) S 0.06 S A B B A0.05 123456 A B C D F E (φ0.15)INDEX POST 0.55MAX 0.1±0.05 0.50±0.05 1PIN MARK 3.50±0.05 3.50±0.05 0.50±0.05 P=0.50×5 P=0.50×5 36-φ0.25±0.05 ∗ Order quantity needs to be multiple of the minimum quantity. <Tape and Reel information> Embossed carrier tapeTape Quantity Direction of feed The direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 2500pcs Direction of feed Reel 1pin

R1120Awww.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. Notice ROHM Customer Support System http://www.rohm.com/contact/ Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us. Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Produc ts. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM and other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. The Products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, commu- nication devices, electronic appliances and amusement devices). The Products specified in this document are not designed to be radiation tolerant. While ROHM always makes efforts to enhance the quality and reliability of its Products, a Product may fail or malfunction for a variety of reasons. Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual. T h e P r o d u c t s a r e n o t d e s i g n e d o r m a n u f a c t u r e d t o b e u s e d w i t h a n y e q u i p m e n t , d e v i c e o r system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel- controller or other safety device). ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes. If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing. If you intend to export or ship overseas any Product or technology specified herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law.

Selected Specification

Rohm BD6088GUL overview.

Summary

Mulitifunction Backlight LED Driver for Small LCD Panels (Charge Pump Type)

Description

Mulitifunction Backlight LED Driver for Small LCD Panels (Charge Pump Type)

Source title BD6088GUL_11 Datasheet(PDF) - Rohm

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