AP2061

AP2061 AKM | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 24

Technical content

CONFIDENTIAL [AP2061] Rev.0.1 G 1 G 2012/10 GENERAL DESCRIPTION The AP2061 is a white LED driver IC for camera flash applications in portable equipments. The device integrates a current mode synchronous boost DC/DC converter and maximum 2A current sources. The internal boost DC/DC converter integrates a switching FET and synchronous rectifier, and supports a small size multilayer inductor with 4MHz switching frequency. The internal current sources allow for grounded cathode connections for easier heat dissipation and simple LED arrangement. AP2061 includes eight protections that are LED thermal detection, inductor current limitation, input voltage detection, over voltage protection, under voltage lock out, device thermal protection, LED open/short protection and output-ground short protection to avoid significant system problems. Flash current, torch current, inductor limit current and flash on-time is programmable through I 2C interface. The device uses a small size package (CSP: 1.6mm x 1.6mm, 0.4mm pitch, 16pins) to utilize less board space. FEATURE /box3 Power Supply Voltage: 2.7V~5.5V /box3 LED Current: max 2.0A, total (max 1A/ch) /box3 High)Side current source /box3 Switching Frequency: 4.0 MHz /box3 Automatically select working mode (DC/DC /bleftright/bleftright/bleftright/bleftrightBypass) /box3 Synchronized with RF power)Amplifier pulse /box3 I 2C Function: ) Flash LED current setting ) Torch LED current setting ) Flashing on)time setting ) Current limit value setting ) LED thermal detection voltage setting ) Battery detection voltage setting ) Error read support /box3 Protection Function: ) LED thermal detection ) Inductor current limit ) Battery voltage detection ) Over voltage protection (OVP) ) Under voltage lock out (UVLO) ) Thermal shutdown ) LED open/short ) Output)ground short /box3 Ta: )30 ~ 85 °C /box3 Package: 16 pins CSP (1.6 x 1.6mm, 0.4mm pitch) 2.0A High)side LED Driver for Camera Flash with I 2C AP2061 = Preliminary = ASAHI KASEI MICRO DEVICES

Figure 1. AP2061 Block Diagram

CONFIDENTIAL [AP2061] Rev.0.1 G 3 G 2012/10 ■Pin Layout A B C Top View D NTC SDA SCL VIN TORCH TXON STROBE VSS LED2 VOUT SW PGND LED1 VOUT SW PGND PIN ／／ ／／FUNCTION No. Pin Name I/O Function C3, D3 VOUT O Voltage Output pin C2,D2 SW I Connect to coil pin A1 VIN G Connect to battery pin C1,D1 PGND G Power ground pin B1 VSS G Analog ground pin D4 LED1 O Connect to Flash/Torch LED pin1 (This pin shall be open when unused) C4 LED2 O Connect to Flash/Torch LED pin2 (This pin shall be open when unused) A4 NTC I/O LED temperature detection pin (connect to NTC thermistor) (This pin shall be connected to ground when unused) B3 TXON I Synchronization input pin for RF transmission signal (This pin shall be connected to ground when unused) PullGdown resistor= 300kohm @typ A2 SCL I I2C clock input pin A3 SDA I/O I 2C data input pin B2 STROBE I Flashing control input pin (This pin shall be connected to ground when unused) PullGdown resistor= 300kohm @typ B4 TORCH I Torching control input pin (This pin shall be connected to ground when unused) PullGdown resistor= 300kohm @typ

CONFIDENTIAL [AP2061] Rev.0.1 G 4 G 2012/10 ABSOLUTE MAXIMUM RATING (PGND=VSS=0V; (Note 1)) Parameter Symbol min max Units VIN, SW, VOUT, LED1, LED2, NTC pins V IN1 −0.3 6.5 V TXON, STROBE, SCL,SDA, TORCH pins V IN2 −0.3 VIN+0.3 (Note 2) V Junction Temperature T JMAX G 125 °C Storage Temperature T STG −55 150 °C Maximum Power Dissipation (Note 3) P D TBD W Note 1. All voltages are with respect to ground. PGND and VSS pins shall be connected to same ground. Note 2. The maximum value is low value either (VIN+0.3)V or 6.5V. Note 3. In the case that PCD (size: TBD x TBDmm, TBDmm, TBD layer), wiring density is 100% or more. The value is internal power loss of AP2061 and does not include external parts power dissipation. Note: Operation at or beyond these limits may result in permanent damage to the device. Normal operation is guaranteed at these extremes. RECOMMENDED OPERATING CONDITIONS (PGND=VSS=0V; (Note 1)) Parameter Symbol min typ max Units Input Voltage (VIN) V batt1 2.7 3.7 5.5 V Operation Temperature T A G30 25 85 °C Note: When 4.7V < VIN < 5.5V, AP2061 can work normally in the case that protection function is not working, but the analog characteristics cannot be guaranteed.

CONFIDENTIAL [AP2061] Rev.0.1 G 5 G 2012/10 ANALOG CHARACTERISTICS (PGND=VSS=0V (Note 1), VIN=2.7~4.7V,TA=G30~85 °C, Recommend Parts, unless otherwise specified) Parameter Symbol min typ max Units Conditions PowerGdown Current I SB 1.0 5.0 µA LED1, LED2 bits = “0” SCL, SDA pins= VIN VIN= 3.7V Quiescent Current (from VIN pin) IQ 1 1.5 mA LED1=LED2=30mA setting VOUT= 4.5V LED Current Accuracy1 I ACCU1 G5 5 % ILED1 =ILED2 = 1000mA (flash mode, VDD=3.7V, T A=25 °C) LED Current Accuracy2 I ACCU2 G8 8 % I LED1 =ILED2 = 1000mA LED Current Accuracy3 I ACCU3 G12 12 % I LED1 =ILED2 = 200mA Current Source Dropped Voltage 1 (VOUTG(LED1 or 2) pin voltage) VDROP1 TBD 0.35 TBD V VLED1 ,V LED2 >=2.8V ILED1 =ILED2 = 0.03~0.8A CB bit= “0” Current Source Dropped Voltage 2 (VOUTG(LED1 or 2) pin voltage) VDROP2 TBD 0.43 TBD V VLED1 ,V LED2 >=2.8V ILED1 =ILED2 = 1A CB bit= “1” Over Voltage Protection Hysteresis OVP TBD 5.1

0.21 TBD V

Under Voltage Lock Out (UVLO) Hysteresis VUVLO 2.4 2.5 0.1 2.6 V Boost Frequency F BOOST 3.7 4.0 4.3 MHz Timeout Time Accuracy T OUTA G10 10 % Inductor Current Limit Accuracy I LIMITA G15 15 % Time (Flash to Torch) T FtoT 5 µs TXON pin= “L” to “H” I LED1 =ILED2 =1000mA to 30mA NTC pin Detection Accuracy V DETA G8 8 % NTC pin current V Current TBD 35 TBD µA VIN Detection Accuracy V DETA G5 5 % VIN Detection Hysteresis V DETH 0.1 V Thermal Protection Temperature Hysteresis Treg Tregh 150 170 190 degree DC CHARACTERISTICS (Ta= G30 ∼ 85 °C; VIN=2.7 ∼ 5.5V), SCL, SDA, TXON, STROBE, TORCH pins. Parameter Symbol min typ max Units HighGLevel Input Voltage VIH 1.2 G VIN V LowGLevel Input Voltage VIL G G 0.4 V LowGLevel Output Voltage (Iout= 3mA) (SDA pin) VOL G G 0.4 V Input Leakage Current 1 (SCL, SDA pins) I IN1 G2 G 2 µA PullGdown Resistance TXON, STROBE, TORCH pins RIN 100 300 700 kΩ

Note 4. Data must be held long enough to bridge the 300ns transition time of SCL. Figure 2. I2C Bus Mode Timing

CONFIDENTIAL [AP2061] Rev.0.1 G 7 G 2012/10 OPERATION OVERVIEW ■ Boost DC/DC Converter The AP2061 is a synchronically boost DC/DC converter with 4MHz switching frequency. The AP2061 can drive LEDs which connect to LED1 and LED2 pins with internal regulated current sources. The regulated current sources (highGside current sources) use PMOS FETs, allowing the LEDs to be directly connected to ground and providing better LED heat dissipation and simpler LED arrangement. The AP2061 can automatically regulate output voltage with different LED Forward Voltages (Vf). The AP2061 integrates a TXON input which can be used to change the LED current from flash mode to torch mode in order to reduce the battery current during RF transmission or high current events. ■ Protection Function To protect against system trouble or device damage, the AP2061 protection functions are as shown below. (PGND=VSS=0V; (Note 1), VIN=3.7V, Ta=25 °C, Recommend Parts, unless otherwise specified) Protection Working condition Device status Return c ondition 1) LED thermal protection (refer to next page) NTC pin voltage < setting voltage (DET[2:0]) All circuits powerGdown Address= “06H”, NTC= “1” Set LED1= LED2= “0” again 2) Over current protection (OCP) Inductor peak current > setting current (LIMIT[1:0]) NMOS change to off when inductor current reach to limited current Return automatically (1 cycle detected) 3) battery voltage detection protection In the case of flashing VIN pin voltage < setting voltage (VIN[1:0]) VINDET bit= “0”: Change to torch mode VINDET bit= “1”: Boost circuit and current source circuit powerGdown Next flash signal, Return automatically VIN pin voltage >setting voltage+0.1V 4) Over Voltage Protection (OVP) VOUT pin voltage > 5.1V Boost circuit powerGdown Return automatically VOUT pin voltage < 5.1V–0.215V 5) Under Voltage Lock Out (UVLO) VIN pin voltage < 2.5V All circuits powerGdown Address= “06H”, UVLO= “1” Set LED1= LED2= “0” again 6) Thermal ShutGDown (TSD) Device temperature > 170 degree TSDSEL bit= “0”: All circuits powerGdown Address= “06H”, TSD= “1” TSDSEL bit= “1”: Boost circuit and current source circuit powerGdown TSDSEL bit= “0”: Set LED1= LED2= “0” again TSDSEL bit= “1”: Return automatically Device temperature >170 degree (VOUTGLED1< 0.1V or VOUTGLED2<0.1V) and OVP is detected All circuit powerGdown Address= “06H”, LO= “1” 7) LED1,LED2 pin in the state of open or short to GND During 20us, LED1 pin < 1.0V or LED2 < 1.0V All circuit powerGdown Address= “06H”, LS= “1” 8) VOUT short to GND VOUT pin voltage< 1.0V or in the case of startGup, during 1ms, VOUT voltage < VING0.1V during 1ms (COUT<=10uF) All circuit powerGdown Address= “06H”, VOS= “1” Set LED1= LED2= “0” again Note) When set LED1=LED2= “0” again, the register will be reset.

CONFIDENTIAL [AP2061] Rev.0.1 G 8 G 2012/10 ■ LED Temperature Detection Function AP2061 can detect LED temperature with NTC thermistor (Negative Temperature Coefficient Thermistor) which connect to NTC pin. The current which flow at NTC thermistor is 35uA. Protection Working condition Device status Return condition LED1~2 temperature protection (Note 5) NTC pin voltage < setting voltage(DET[2:0]) All circuits powerGdown Address= “06H”, NTC= “1” Set LED1= LED2= “0” again Note 5. The parasitic capacitor of NTC pin should be lower 50pF. Example ） NTC thermistor： NCP15WM154(150k @25 °C、B constant=4582, 1005 size, Murata) NCP15WM224(220k @25 °C、B constant=4582, 1005 size, Murata) Formula ： R=Ro*exp(B*(1/TG1/To)) (R ：The value in the case of ambit temperature T(k)； Ro ：The value in the case of ambit temperature To(k)) Detection voltage(V) @typ Detection temperature(°C) (in the case of using 150kohm) 74 71 69 66 64 62 61 Detection temperature(°C) (in the case of using 220kohm) 84 82 79 76 74 72 70 Resistor (kohm) Temperature(°C) In the case of using 150kohm In the case of using 220kohm

• LEVEL control: Flashing: A) The time of STROBE pin= “H” or the time of FLASH bit= “1” < setting timer Driving LED while STROBE= “H” or FLASH bit= “1”. B) The time of STROBE pin= “H” or the time of FLASH bit= “1” > setting timer Maximum driving time is limited by setting time. Torching: Driving LED while TORCH pin= “H” or TORCH bit= “1”.
• EDGE control: Flashing: Driving LED with the edge of STROBE pin= “L” to “H” or the edge of FLASH bit= “0” to“1”. Maximum driving time is limited by setting time. Torching: Driving LED while TORCH pin= “H” or TORCH bit= “1”. 1) Flashing sequence （LEVEL control）

Figure 3. Flashing Sequence (LEVEL control) (2) After LED1, LED2 bits is set, VOUT pin voltage change to VIN*95% within 5ms, and inrush current< 500mA. (3) After register setting finished, Please set STROBE pin= “H” or FLASH bit= “1”. AP2061 can drive LED with STROBE pin or FLASH bit, did not depend on VOUT voltage. After LED1, LED2 bits is set, please wait 5ms, then set STROBE pin= “H” or FLASH bit= “1”. (4) After STROBE pin= “L” to “H” or FLASH bit= “0” to “1”, internal timer will start. After timer finished, LED current is change to 0mA. LED current is change to 0mA immediately. (7) The timer will be reset wit STROBE pin= “H” to “L” or FLASH bit= “1” to “0”.

Figure 4. Flashing Sequence (EDGE control) (2) After LED1, LED2 bits is set, VOUT pin voltage change to VIN*95% within 5ms, and inrush current< 500mA. (3) After register setting finished, Please set STROBE pin= “H” or FLASH bit= “1”. AP2061 can drive LED with STROBE pin or FLASH bit, did not depend on VOUT voltage. After LED1, LED2 bits is set, please wait 5ms, then set STROBE pin= “H” or FLASH bit= “1”. (4) After STROBE pin= “L” to “H” or FLASH bit= “0” to “1”, internal timer will start. (6) After timer finished, LED current will change to 0mA, even STROBE pin= “H” or FLASH bit= “1”. (7) When timer finished, it will be reset automatically.

Figure 5. Torching Sequence (2) After LED1, LED2 bits is set, VOUT pin voltage change to VIN*95% within 5ms, and inrush current< 500mA. (3) After register setting finished, Please set TORCH pin= “H” or TORCH bit= “1”. AP2061 can drive LED with TORCH pin or TORCH bit, did not depend on VOUT voltage. After LED1, LED2 bits is set, please wait 5ms, then set TORCH pin= “H” or TORCH bit= “1”. setting current within 300 µs. (5) After TORCH pin= “1” to “0” or TORCH bit= “1” to “0”, LED current will change to 0mA.

Figure 6. Torching to Flashing sequence (LEVEL control) (2) After LED1, LED2 bits is set, VOUT pin voltage change to VIN*95% within 5ms, and inrush current< 500mA. (3) After register setting finished, waiting Please set TROCH pin= “H” or TORCH bit= “1”. After LED1, LED2 bits is set, please wait 5ms, then set TORCH pin= “H” or TORCH bit= “1”. (4) After TROCH pin= “L” to “H” or TORCH bit= “0” to “1”, LED current will reach to setting current within 300 µs. (5) After STROBE pin= “L” to “H” or FLASH bit= “0” to “1”, internal timer will start. (6) After STROBE pin= “L” to “H” or FLASH bit= “0” to “1”, LED current will reach to setting current within 500 µs. After timer finished, LED current is change to 0mA. LED current is change to 0mA immediately. (8) The timer will be reset wit STROBE pin= “H” to “L” or FLASH bit= “1” to “0”.

Figure 7. T orching to Flashing sequence (EDGE control) (2) After LED1, LED2 bits is set, VOUT pin voltage change to VIN*95% within 5ms, and inrush current< 500mA. (3) After register setting finished, Please set TORCH pin= “H” or TORCH bit= “1”. After LED1, LED2 bits is set, please wait 5ms, then set TORCH pin= “H” or TORCH bit= “1”. (4) After TROCH pin= “L” to “H” or TORCH bit= “0” to “1”, LED current will reach to setting current within 300 µs. (5) After STROBE pin= “L” to “H” or FLASH bit= “0” to “1”, internal timer will start. (6) After STROBE pin= “L” to “H” or FLASH bit= “0” to “1”, LED current will reach setting current within 500 µs. (7) After timer finished, LED current will change to 0mA, even STROBE pin= “H” or FLASH bit= “1”. (8) When timer finished, it will be reset automatically.

Note) The writing of Addr >= “07H” is prohibited. INST[7:0]: The instruction for error protection. IF INST[7:0] = 0110110 is not written, the access for other register is not effective. At first, please set INST[7:0] = 0110110. LED1, LED2: The power ON/OFF for AP2061 and the ON/OFF control for LEDs that connect to LED2, LED1. Table 1. AP2061&LED status setting

TIME0, TIME1, TIME2, TIME3: The onGtime setting for LEDs that connect to LED1, LED2 in flash mode. Table 2. LED onGtime setting in the case of flash mode Note) In the case of LED current = 1A/ch, if the flashing time more than 90ms, thermal protection is possible working.

LEDF0, LEDF1, LEDF2: The current setting for LEDs that connect to LED1, LED2. Table 3. LED current setting in the case of flash mode LEDT0, LEDT1, LEDT2: The current setting for LEDs that connect to LED1, LED2. Table 4. LED current setting in the case of torch mode

Table 5. inductor current limit setting Table 6. NTC pin voltage detection Table 7. Input voltage detection

Table 8. LED Control Status (LED1=LED2 bits= “01” or “10” or “11”) LS: Show LED1 pin short to GND or LED2 pin short to GND. VOS: Show VOUT1 pin short to GND or VOUT2 short to GND. UVLO: Show UVLO is detected or not. LO: show LED is open or not. NTC: NTC protection is working or not. TSD: Thermal shut down is detected or not.

GND, if these pins are not used. Table 9. Recommend external parts example G PGND and VSS shall be connected to the same ground plane. G Inductor shall be placed as close as possible to the chip. G Capacitors shall be placed as close as possible to the chip. G Low ESR (Equivalent Series Resistance) capacitors are recommended.

CONFIDENTIAL [AP2061] Rev. 0.1 G 23 G 2012/10 PACKAGE Unit: mm MARKING 2061 YWWA Market No.（Product No.） Pin #1 indication YWWA : Date code (4 digit) A: manage number WW: producing week Y: producing year (Ex: 2012G> “2”)

CONFIDENTIAL [AP2061] Rev. 0.1 G 24 G 2012/10 IMPORTANT NOTICE /circle6 These products and their specifications are subject to change without notice. When you consider any use or application of these products, please make inquiries to the sales office of Asahi Kasei Microdevices Corporation (AKM) or authorized distributors as to the current status of the products. /circle6 Descriptions of external circuits, application circ uits, software and other related information contai ned in this document are provided only to illustrate the operation and application examples of the semiconductor products. You are fully responsible for the incorporation of thes e external circuits, application circuits, software and other related information in the design of your equipment. AKM assumes no responsibility for any losses incurred by you or third parties arising from the use of the information her ein. AKM assumes no liability for infringement of a ny patent, intellectual property, or other rights in the application or use of such information contained herein. /circle6 Any export of these products, or devices or systems containing them, may require an export license or other official approval under the law and regulations of the country of export pertaining to customs and tariffs, currency exchange, or strategic materials. /circle6 AKM products are neither intended nor authorized fo r use as critical components Note1) in any safety, life support, or other hazard related device or system Note2) , and AKM assumes no responsibility for such use, e xcept for the use approved with the express written consent by Representative Director of AKM. As used here: Note1) A critical component is one whose failure to function or perform may reasonably be expected to result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system containing it, and which must therefore meet very high standards of performance and reliability. Note2) A hazard related device or system is one designed or intended for life support or maintenance of safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to function or perform may reasonably be expected to result in loss of life or in significant injury or damage to person or property. /circle6 It is the responsibility of the buyer or distributor of AKM products, who distributes, disposes of, or otherwise places the product with a third party, to notify such third party in advance of the above content and conditions, and the buyer or distributor agrees to assume any and all responsibility and liability for and hold AKM harmless from any and all claims arising from the use of said product in the absence of such notification.