MBI5252

MBI5252 MACROBLOCK | Alldatasheet

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Features

 3V-5.5V supply voltage  16 constant current output channels  Constant output current range: - 0.5~20mA @ 5V supply voltage - 0.5~10mA @ 3.3V supply voltage  Excellent output current accuracy: Between channels:：<±2.5％(Max.) Between ICs: <±3％(Max.)  Built-in 8K-bit SRAM to support time-multiplexing for 1 ~ 16 scans  14-bit /13-bit color depth PWM contro l to improve visual refresh rate  6bit current gain ，12.5%~200%  LED failure isolation -LED failure induced cross elimination  LED open detection  Integrating ghost elimination circuit  GCLK multiplier technology  Maximum DCLK frequency: 30MHz  Package MSL Level: 3 Product Description MBI5252 is designed for LED video applications using in ternal Pulse Width Modulation (PWM) control with selectable 14-bit / 13-bit color depth. MB I5252 features a 16-bit shift register which converts serial input data into each pixel’s gray scale of the output port. Sixteen regulated current ports are designed to provide uniform and constant current sinks for driving LEDs with a wide range of VF variations. The output current can be preset through an external resistor. The innovative architecture with embedded SRAM is designed to support up to 1:16 time-multiplexing applications. Users only need to send the whole frame data once and to store in the embedded SRAM of the LED driver, instead of sending every time w hen the scan line is changed. It helps to save the data bandwidth and to achieve high grayscale with very low data clock rate. With scan-type Scrambled-PWM (S-PWM) technology, MBI5252 enhances PWM by scrambling the “on” time of each scan line into several “on” periods and sequentially drives each scan line for a short “on” period. The enhancement equivalently increases the visual refresh rate of scan-type LED displays. In addition, the innovative GCLK multiplier technique doubles visual refresh rate. MBI5252 drives the corresponding LEDs to the bright ness specified by image data. With MBI5252, all output channels can be built with 14-bit color depth (16,384 gray scales). When building a 14-bit color depth video, S-PWM technology reduces the flickers and improves the image fidelity. Through compulsory error detection, MBI5252 detects i ndividual LED for open-circuit errors without extra components. MBI5252 equipped an innovative cross eliminat ion function, and it solves the cross phenomenon induced by failure LEDs. Besides, integrated ghost elimination circuit eases the ghost problems. Quad Flat No-leads GFN: QFN24L-4x4-0.5 Shrink SOP GP: SSOP24L-150-0.64

November 2014, V1.00 - 2 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Block Diagram Figure 1 LE IO Regulator R-EXT GND 16-bit Shift Register (FIFO) SDI DCLK SDO Control Unit 14-bit Counter OUT0 1OUT OUT14 OUT15 Comparators Comparators Comparators Comparators GCLK Configuration Register 8K-bit SRAM Buffers Output Buffers 16 16 16-bit error status Pre-charge Circuit Digital to analog converter

November 2014, V1.00 - 3 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 24GND SDI DCLK LE OUT 1 OUT 2 OUT 3 OUT 4 OUT 5 OUT 6 OUT 7 OUT 0 VDD SDO R-EXT OUT8 OUT12 OUT13 OUT14 OUT11 OUT10 OUT9 OUT15 GCLK Pin Configuration Terminal Description Pin Name Function GND Ground terminal for control logic and current sink SDI Serial-data input to the shift register DCLK Clock input terminal used to shift data on rising edge and carries command information when LE is asserted. LE Data strobe terminal and controlling command with DCLK OUT0 ~ OUT15 Constant current output terminals GCLK Gray scale clock terminal Clock input for gray scale. The gray scale display is counted by gray scale clock compared with input data. SDO Serial-data output to the receiver-end SDI of next LED driver R-EXT Input terminal used to connect an external resistor for setting up output current for all output channels VDD 3.3V/5V supply voltage terminal MBI5252 GP 87 91 01 1 1 2 2324 22 21 20 19 OUT4 OUT3 OUT2 OUT1 OUT0 LE OUT10 OUT15 OUT14 OUT13 OUT12 OUT11 MBI5252 GFN

November 2014, V1.00 - 4 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Equivalent Circuits of Inputs and Outputs GCLK, DCLK, SDI terminal VDD IN LE Terminal VDD IN SDO Terminal VDD OUT

November 2014, V1.00 - 5 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Maximum Rating Characteristic Symbol Rating Unit Supply Voltage V DD 0~7 V Input Pin Voltage (SDI, DCLK, GCLK, LE) V IN -0.4~V DD+0.4 V Sustaining Voltage at OUT Port V DS -0.5~17 V Output Current I OUT +22 mA GND Terminal Current I GND 360 mA Power Dissipation (On 4 Layer PCB, Ta=25°C)* GP Type PD 1.79 W GFN Type 3.12 Thermal Resistance (On 4 Layer PCB, Ta=25°C)* GP Type Rth(j-a) 69.5 °C/W GFN Type 40.01 Junction Temperature T j,max 150** °C Operating Ambient Temperature T opr -40~+85 °C Storage Temperature T stg -55~+150 °C ESD Rating Human Body Mode (MIL-STD-883G Method 3015.7,) HBM Class 3B (8KV) - Machine Mode (JEDEC EIA/ JESD22-A115,) MM Class C (400V) - *The PCB size is 76.2mm*114.3mm in simulation. Please refer to JEDEC JESD51. ** Operation at the maximum rating for extended periods may reduce the device reliability; therefore, the suggested junction temperature of the device is under 125°C. Note: The performance of thermal dissipation is strongly re lated to the size of thermal pad, thickness and layer numbers of the PCB. The empirical thermal resistance may be different from simulative value. User should plan for expected thermal dissipation performance by selecting pa ckage and arranging layout of the PCB to maximize the capability.

November 2014, V1.00 - 6 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Electrical Characteristics (VDD=5.0V, Ta=25°C) Characteristics Symbol Condi tion Min. Typ. Max. Unit Supply Voltage V DD - 4.5 5.0 5.5 V Sustaining Voltage at OUT Ports V DS OUT0 ~ OUT15 - - 17 V Output Current IOUT Refer to “Test Circuit for Electrical Characteristics” 0.5 - 20 mA IOH SDO - - -1.0 mA IOL SDO - - 1.0 mA Input Voltage “H” level V IH Ta=-40~85ºC 0.7xV DD - V DD V “L” level V IL Ta=-40~85ºC GND - 0.3xV DD V Output Leakage Current I OH V DS=17.0V - - 0.5 μA Output Voltage SDO VOH I OH=-1.0mA V DD-0.4 - - V VOL I OL=+1.0mA - - 0.4 V Current Skew (Channel) dI OUT1 IOUT=1mA VDS=1.0V Rext=14kΩ - ±1.5 ±2.5 % Current Skew (IC) dI OUT2 IOUT=1mA VDS=1.0V Rext=14kΩ - ±1.5 ±3.0 % Output Current vs. Output Voltage Regulation* %/dVDS VDS within 1.0V and 3.0V, Rext=1.4KΩ@10mA - ±0.1 ±0.3 % / V Output Current vs. Supply Voltage Regulation* %/dVDD VDD within 4.5V and 5.5V Rext=1.4KΩ@10mA - ±1.0 ±2.0 % / V LED Open Detection Threshold V OD,TH - - 0.5 - V Pull-down Resistor R IN(down) LE 250 450 800 K Ω Supply Current “Off” (SDI=DCLK =GCLK=0Hz) IDD(off) 1 Rext=Open, OUT0~ OUT15 =Off - 4.5 5.5 mA IDD(off) 3 Rext=14KΩ, OUT0~ OUT15 =Off - 5.0 6.0 IDD(off) 4 Rext=1.4KΩ, OUT0~ OUT15 =Off - 6.5 8.0 “On” (SDI= DCLK=5MHz, GCLK=20MHz) IDD(on) 9 Rext=14KΩ, OUT0~ OUT15 =On - 6.5 8.0 IDD(on) 10 Rext=1.4KΩ, OUT0~ OUT15 =On - 8.5 10 *One channel on.

November 2014, V1.00 - 7 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Electrical Characteristics (VDD=3.3V, Ta=25°C) Characteristics Symbol Condi tion Min. Typ. Max. Unit Supply Voltage V DD - 3.0 3.3 3.6 V Sustaining Voltage at OUT Ports V DS OUT0 ~ OUT15 - - 17 V Output Current IOUT Refer to “Test Circuit for Electrical Characteristics” 0.5 - 10 mA IOH SDO - - -1.0 mA IOL SDO - - 1.0 mA Input Voltage “H” level V IH Ta=-40~85ºC 0.7xV DD - V DD V “L” level V IL Ta=-40~85ºC GND - 0.3xV DD V Output Leakage Current I OH V DS=17.0V - - 0.5 μA Output Voltage SDO VOH I OH=-1.0mA V DD-0.4 - - V VOL I OL=+1.0mA - - 0.4 V Current Skew (Channel) dI OUT1 IOUT=1mA VDS=1.0V Rext=14kΩ - ±1.5 ±2.5 % Current Skew (IC) dI OUT2 IOUT=1mA VDS=1.0V Rext=14kΩ - ±1.5 ±3.0 % Output Current vs. Output Voltage Regulation* %/dVDS VDS within 1.0V and 3.0V, Rext=1.4KΩ@10mA - ±0.1 ±0.3 % / V Output Current vs. Supply Voltage Regulation* %/dVDD VDD within 3.0V and 3.6V Rext=1.4KΩ@10mA - ±1.0 ±2.0 % / V LED Open Detection Threshold V OD,TH - - 0.3 - V Pull-down Resistor R IN(down) LE 250 450 800 K Ω Supply Current “Off” (SDI=DCLK =GCLK=0Hz) IDD(off) 1 Rext=Open, OUT0~ OUT15=Off - 4.5 5 mA IDD(off) 2 Rext=14KΩ, OUT0~ OUT15=Off - 4.5 5.5 IDD(off) 3 Rext=1.4KΩ, OUT0~ OUT15=Off - 6.0 7.0 “On” (SDI= DCLK=5MHz, GCLK=20MHz) IDD(on) 2 Rext=14KΩ, OUT0~ OUT15=On - 6.0 7.0 IDD(on) 3 Rext=1.4KΩ, OUT0~ OUT15=On - 7.5 9.0 *One channel on. Test Circuit for Electrical Characteristics Figure 2

November 2014, V1.00 - 8 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Switching Characteristics (VDD=5.0V, Ta=25°C) Characteristics Symbol Condi tion Min. Typ. Max. Unit Setup Time SDI - DCLK↑ tSU0 VDD=5.0V VIH=VDD VIL=GND Rext=1.4KΩ VDS=1V RL=300Ω CL=10pF C1=100nF C2=10μF CSDO=10pF VLED=4.0V 5 - - ns LE↑ – DCLK ↑ tSU1 8 - - ns LE↓(Vsync) – GCLK tSU2 1200 ns LE↓ – DCLK ↑ tSU3 50 ns Hold Time DCLK↑ - SDI tH0 6 - - ns DCLK↑ - LE tH1 8 - - ns GCLK – LE↑(Vsync) tH2 300 ns Propagation Delay Time DCLK – SDO tPD0 - 22 25 ns GCLK – OUT2n* tPD1 - 35 - ns LE – SDO tPD2* - 30 40 ns Staggered Delay of Output tDL1 - 5 - ns Pulse Width LE tw(LE) 15 ns Command to Command Tcc 50 - - ns Data Clock Frequency FDCLK - - 30 MHz Gray Scale Clock Frequency* FGCLK - - 33 MHz GCLK frequency ( when GCLK multiplier is enabled ) FGCLK 16.6 MHz Min Clock(GCLK/DCLK) Pulse Width** tW(CLK) 12 - - ns Ratio of (GCLK freq)/(DCLK freq) R(GCLK/DCLK) 20 - - % Compulsory Error Detection Operation time*** tERR-C 700 - - ns Output Rise Time of Output Ports tOR - 15 25 ns Output Fall Time of Output Ports tOF - 15 25 ns Dead Time t dth 300 ns Dead Time ( Low state) t dtl 1200 - - ns *Output waveforms have good uniformity among channels. Refer to the Timing Waveform, where n=0, 1, 2, 3, 4, 5, 6, 7. *In timing of “configuration read”, the next DCLK rising edge should be tPD2 after LE’s falling edge. **The Gray Scale Clock period must be 50% duty cycle when the function of GCLK multiplier is enabled. *Users have to leave more time than the maximum error detection time for the error detection. 1 n 2OUT 

November 2014, V1.00 - 9 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Switching Characteristics (VDD=3.3V, Ta=25°C) Characteristics Symbol Condition Min. Typ. Max. Unit Setup Time SDI - DCLK↑ tSU0 VDD=3.3V VIH=VDD VIL=GND Rext=1.4KΩ VDS=1V RL=300Ω CL=10pF C1=100nF C2=10μF CSDO=10pF VLED=4.0V 7 - - ns LE – DCLK↑ tSU1 10 - - ns LE↓(Vsync) – GCLK tSU2 1200 - - ns LE↓ – DCLK ↑ tSU3 52 ns Hold Time DCLK↑ - SDI tH0 8 - - ns DCLK↑ - LE tH1 10 - - ns GCLK – LE↓(Vsync) tH2 300 - - ns Propagation Delay Time DCLK – SDO tPD0 - 25 30 ns GCLK –OUT2nതതതതതതതതതത* tPD1 - 45 - ns LE – SDO tPD2* 40 50 ns Staggered Delay of Output tDL1 - 8 - ns Pulse Width LE tw(LE) 16 ns Command to Command tcc 52 - - ns Data Clock Frequency FDCLK - - 25 MHz Gray Scale Clock Frequency FGCLK - - 20 MHz GCLK frequency ( when GCLK multiplier is enabled ) FGCLK 10 MHz Min Clock(GCLK/DCLK) Pulse Width tW(CLK) 13 ns Ratio of (GCLK freq)/(DCLK freq) R(GCLK/DCLK) 20 - % Compulsory Error Detection Operation time*** tERR-C 700 - - ns Output Rise Time of Output Ports tOR 25 35 ns Output Fall Time of Output Ports tOF 25 35 ns Dead Time tdth 300 - - ns Dead Time ( Low state) tdtl 1200 - - ns *Output waveforms have good uniformity among channels. Refer to the Timing Waveform, where n=0, 1, 2, 3, 4, 5, 6, 7. *In timing of “configuration read”, the next DCLK rising edge should be tPD2 after LE’s falling edge. **The Gray Scale Clock period must be 50% duty cycle when the function of GCLK multiplier is enabled. *Users have to leave more time than the maximum error detection time for the error detection. 1 n 2OUT 

November 2014, V1.00 - 10 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Test Circuit for Switching Characteristics Figure 3 GCLK DCLK LE VDD GND SDO Generator Function IOUT Rext VLED VIH = VDD SDI OUT15 C 2 VDD R L C L VDS VIL = 0V R- EXT I DD OUT 0 R L C L CSDO VIH ,V IL

November 2014, V1.00 - 11 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Timing Waveform GCLK tH2 tSU2 LE vsync cmd

November 2014, V1.00 - 12 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 GCLK Dead Time

November 2014, V1.00 - 13 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Control Command *Those commands can only be activated after Pre-Active command; otherwise, they will be invalid. Note: When the power is on, Vsync command will be valid only after 16 times of “Data Latch” commands that have been sent in advance. The following figures show the waveforms of commands which require or don’t require “Pre-Active” ahead. Command Name Signals Combination Description LE Number of DCLK Rising Edge when LE is asserted Action of Command Stop Compulsory Error detection High 1 Stop compulsory LED open detection. Data Latch High 1 Serial data are transferred to the input data buffers. VSYNC High 2 Vertical Synchronal signal. Displaying frame will be updated to output channel. Write Configuration 1* High 4 Serial data are written to the configuration register.1 Read Configuration 1 High 5 Serial data are read from t he configuration register.1 Start Compulsory Error detection High 7 Start compulsory LED open detection Write Configuration 2* High 8 Serial data are written to the configuration register.2 Read Configuration 2 High 9 Serial data are read from t he configuration register.2 Software Reset High 10 Reset the behavior of MBI5252 except the value of configuration registers. Pre-Active High 14 Pre-Active command needs to be sent before “Write Configuration” command. Commands which don't require Pre-Active ahead DCLK LE Commands which require Pre-Active ahead DCLK LE Commands which don't require Pre- Active ahead. Vsync cmd is one of the examples. ( LE is high for 2DCLKs rising edge ) Pre-Active ( LE is high for 14 DCLKs rising edge LE should be low for any rising edge of DCLK For example, Write Configuration cmd ( LED is high for 4 DCLKs rising edge

November 2014, V1.00 - 14 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Waveform of Commands The following figures show the waveforms of each command. Data Latch Data Latch command is used to latch the 16-bit shift register from SDI to internal SRAM buffer. When this command is received, the last 16 bits data before the falling edge of LE will be latched into SRAM, as shown in the above waveform, and MSB bit needs to be sent first. Vertical Sync (VSYNC) “VSYNC” command is used to update frame data on output channels ( OUT0~ OUT15). There are some timing limitations between signal “LE” and “GCLK”; and please refer to the section of “Vsync Command Operation” for details. Write Configuration “Write configuration” command is used to program the configuration register of MBI5252. The “Pre-Active” command must be sent in advance. When this command is received, the last 16 bits data before the falling edge of LE will be latched into configuration register, as shown in the above waveform, and MSB bit needs to be sent first. Cycle 0 1 2 3 1 4 0 1 2 1 21 31 41 51 6 DCLK LE SDI fe 3210 Write ConfigurationPre-Active Command 01 2 3 DCLK LE SDI VSYNC Cycle Cycle 0 1 2 12 13 14 15 16 DCLK LE SDO f e 3210

November 2014, V1.00 - 15 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Read Configuration “Read configuration” command is used to read the configuration register of MBI5252. When this command is received, the 16-bit data of configuration register will be shifted out from SDO pin, as shown in the above waveform, and MSB bit will be shifted out first. Software Reset “Software reset” command makes MBI5252 go back to the initial state except configuration register value. After this command is received, the output channels will be turned off and will display again with last gray-scale value after new “Vsync” command is received. Cycle 012345 6 2 1 DCLK LE SDO fe 10 tsu3 Read Configuration Cycle 0123 1 0 DCLK LE Software Reset

November 2014, V1.00 - 16 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Definition of Configuration Register 1 M S B L S B F E D C B A 9 8 7 6 5 4 3 2 1 0 e.g. Default Value F E D C B A 9 8 7 6 5 4 3 2 1 0 0 0 0 0 0 0 1 1 0 0 101011 Default setting of configuration register is 16’h032B Bit Attribute Definition Value Function F Read/Write Lower ghost elimination 0 (Default) 0:Disable 1:Enabled E~C Reserved Reserved 000 (Default) Reserved B-8 Read/Write Number of scan lines 0000 0001 0010 0011 (Default) 1111 0000: 1 line 0001: 2 lines 0010: 3 lines 0011: 4 lines …….. 1110: 15 lines 1111: 16 lines

7 Read/Write Gray scale mode

0 (Default) The 16384 GCLKs (14-bit) PWM cycle is divided into 32 sections, and each section has 512 GCLKs. The 8192 GCLKs(13-bit) PWM cycle is divided into 16 sections, and each section has 512 GCLKs.,

6 Read/Write GCLK multiplier

0 (Default) GCLK multiplier disable

1 GCLK multiplier enable

5~0 Read/Write Current gain adjustment 000000~111111 6’b101011 (Default) Allow 64-step programmable current gain from 12.5 % to 200%

November 2014, V1.00 - 17 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Definition of Configuration Register 2 M S B L S B F E D C B A 9 8 7 6 5 4 3 2 1 0 e.g. Default Value F E D C B A 9 8 7 6 5 4 3 2 1 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 Default setting of configuration register is 16’h032B Bit Attribute Definition Value Function F~B Reserved Reserved Reserved Reserved A Read/Write Double refresh rate 0(Default) 0: Disable 1: Enable 9~4 Reserved Reserved Reserved Reserved 3~1 Read/Write dim line compensation 000 (Default) 000: 0 ns, 100: 20ns 001: 5 ns, 101: 25ns 010: 10 ns, 110: 30ns 011: 15 ns, 111: 35ns

0 Reserved Reserved Reserved Reserved

November 2014, V1.00 - 18 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Number of Scan Line MBI5252 supports 1 to 16 scan lines. Please set the configur ation register1 bit [B:8] according to the application. The default value ‘0011’ is 4 scan lines. Gray Scale Mode and Scan-type S-PWM MBI5252 provides a selectable 14-bit or 13-bit gray scale by setting the conf iguration register1 bit [7]. The default value is set to ’0’ for 14-bit color depth. In 14-bit gray scale mode, users should still send 16-bit data with 2-bit ‘0’ in LSB bits. For example, {14’h1234, 2’h0}. MBI5252 has a smart S-PWM technology for scan type. With S-PWM, the total PWM cycles can be broken into MSB (Most Significant Bits) and LSB (Least Significant Bits) of gray scale cycles. The MSB information can be broken down into many refresh cycles to achieve overall same high bit resolution. GCLK multiplier MBI5252 provides a GCLK multiplier function by setting the configuration register1 bit [6]. The default value is set to ’0’ for GCLK multiplier disable. GCLK multiplier disabled (configuration register1 bit [6] = 0) GCLK multiplier enabled (configuration register1 bit [6] = 1) Scan line 0 257 x 16 GCLKs Once of 14-bit PWM Counting Bit [7]=”0”: 257 x 16 x 32 =131,584 GCLKs : Output ports are turned “on”. Scan line 1 Scan line 15 Scramble 0 Scramble 1 Scramble 31 ... ... ... Display sequence of 32 scrambles Scan line 0 513 x 16 GCLKs Once of 14-bit PWM Counting Bit [7]=”0”: 513 x 16 x 31 =262,656 GCLKs : Output ports are turned “on”. Scan line 1 Scan line 15 Scramble 0 Scramble 1 Scramble 31 ... ... ... Display sequence of 32 scrambles

November 2014, V1.00 - 19 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Operation Principal Scan type application structure The above figure shows the suggested application structure of scan type scheme with 16 scan lines. The gray-scale data are sent by pin “SDI and SDO” with the commands formed by pin “LE” and “DCLK”. The output ports from 16 channels ( OUT0~ OUT15 ) will output the PWM result for each scan line at different time, so there must be one “Switch” to multiplex for each scan line. The swit ching sequence and method and the command usage will be described in the application note. Scan line 0 OUT15 (ch15) MBI5252 VLED Scan line 1 Scan line 15 OUT14 (ch14) OUT0 (ch0) OUT15 (ch15) MBI5252 OUT14 (ch14) OUT0 (ch0)… SDI SDI SDO DCLK GCLK LE Switch

November 2014, V1.00 - 20 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Constant Current In LED display application, MBI5252 provides nearly no variati on in current from channel to channel and from IC to IC. This can be achieved by: 1) The maximuml current variation between channels is less than 2.5%, and that between ICs is less than ±3% 2) In addition, the current characterist ic of output stage is flat and user c an refer to the figure below. The output current can be kept constant regardless of the variations of LED forward voltages (V F). This guarantees LED to be performed on the same brightness as user’s specification. 0 0.5 1 1.5 2 2.5 3 VDS(V) MBI5252 VDS vs. IOUT ( VDD=5.0V ) 1mA 5mA 10mA 20mA IOUT (mA) 0 0.5 1 1.5 2 2.5 3 VDS(V) MBI5252 VDS vs. IOUT ( VDD=3.3V ) 1mA 5mA 10mA IOUT (mA)

November 2014, V1.00 - 21 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Setting Output Current The output current (IOUT) is set by an external resistor, Rext. The default relationship between IOUT and Rext is shown in the following figure. Also, the output current can be calculated from the equation: VR-EXT=0.61Volt x G; IOUT= (VR-EXT/Rext) x24.0 Whereas Rext is the resistance of the external resistor connected to R-EXT terminal and VR-EXT is its voltage. G is the digital current gain, which is set by the bit5 – bit0 of the configuration register. The default value of G is 1. The formula and setting for G are described in next section. 0 2000 4000 6000 8000 10000 12000 14000 IOUT(mA) REXT(Ω) IOUT vs. REXT

November 2014, V1.00 - 22 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Current Gain Adjustment ranging from 6’b000000 to 6’b111111, these bits allow user to set the output current gain up to 64 levels. These bits can be further defined inside configuration register as follows: F E D C B A 9 8 7 6 5 4 3 2 1 0 - - - - - - - - - - HC DA4 DA3 DA2 DA1 DA0 1. Bit 5 is HC bit. The setting is in low current band when HC=0, and in high current band when HC=1. 2. Bit 4 to bit 0 are DA4 ~ DA0. The relationship between these bits and current gain G is: HC=1, D=(65xG-33)/3 HC=0, D=(256xG-32)/3 and D in the above decimal numeration can be converted to its equivalent in binary form by the following equation: D= DA4x2 4+DA3x23+DA2x22+DA1x21+DA0x20 In other words, these bits can be looked as a floating number with 1-bit exponent HC and 5-bit mantissa DA4~DA0. For example, the D in binary form would be: D=16=1x2 4+0x23+0x22+0x21+0x20 The 6 bits (bit 5~bit 0) of the configuration register are set to 6’b110000. 0,0000 0,1000 1,0000 1,1111 1,1000 0.125 0.488 0.406 0.312 0.218 Gain (DA4~DA0) Note: HC=0，Gain range=( 0.488 ~ 0.125 ) 32 steps 0,0000 0,1000 1,0000 1,1111 1,1000 0.508 1.938 1.615 1.246 0.877 0,1011 Default value： 1 Gain (DA4~DA0) Note: HC=1，Gain range=( 1.938 ~ 0.508 ) 32 steps

November 2014, V1.00 - 23 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Package Power Dissipation (PD) The maximum allowable package power dissipation is determined as PD(max)=(Tj–Ta)/Rth(j-a). When 16 output channels are turned on simultaneously, the actual package power dissipation is PD(act)=(IDDxVDD)+(IOUTxDutyxVDSx16). Therefore, to keep PD (act)≤PD (max), the allowable maximum output current as a function of duty cycle is: I OUT={[(Tj–Ta)/Rth(j-a)]–(IDDxVDD)}/VDS /Duty/16, where Tj=150°C. Please see the follow table for PD and Rth(j-a) for different packages: Device Type R th(j-a) (°C/W) P D (W) GP 69.50 1.79 GFN 40.01 3.12 The maximum power dissipation, PD(max)=(Tj–Ta)/Rth(j-a), decreases as the ambient temperature increases. 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 01 0 20 30 40 50 60 70 80 Power Dissipation (W) Ambient Temperature (°C) MBI5252 Maximum Power Dissipation at Various Ambient Temperature GP Type: Rth=69.50°C/W GFN Type: Rth=40.01°C/W Safe Operation Area

November 2014, V1.00 - 24 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 LED Supply Voltage (VLED) MBI5252 is designed to operate with VDS ranging from 0.4V to 1.0V (depending on IOUT=0.5~20mA) considering the package power dissipating limits. VDS may be higher enough to make PD (act) >PD (max) when VLED=5V and VDS=VLED–VF, in which VLED is the load supply voltage. In this case, it is recommended to use the lowest possible supply voltage or to set an external voltage reducer, VDROP. A voltage reducer lets VDS=(VLED–VF)–VDROP. Resistors or Zener diode can be used in the applications as shown in the following figures. Switching Noise Reduction LED drivers are frequently used in switch-mode applications which always behave with switching noise due to the parasitic inductance on PCB. To eliminate switching noi se, refer to “Application Note for 8-bit and 16-bit LED Drivers- Overshoot”. MBI5252 MBI5252 VF VF VDS VDS VDrop VDrop Supply Voltage Supply Voltage (VLED) Figure 5 (VLED)

November 2014, V1.00 - 25 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Soldering Process of “Pb-free & Green” Package Plating* Macroblock has defined "Pb-Free & Green" to mean semicond uctor products that are compatible with the current RoHS requirements and selected 100% pure tin (Sn) to pr ovide forward and backward compatibility with both the current industry-standard SnPb-based soldering processes and higher-temperature Pb-free processes. Pure tin is widely accepted by customers and suppliers of electronic devices in Europe, Asia and the US as the lead-free surface finish of choice to replace tin-lead. Also, it adopts tin/lead (SnPb) solder pa ste, and please refer to the JEDEC J-STD-020C for the temperature of solder bath. However, in the whole Pb-free soldering processes and materials, 100% pure tin (Sn) will all require from 245 oC to 260oC for proper soldering on boards, referring to JEDEC J-STD-020C as shown below. For managing MSL3 Package, it should refer to JEDEC J-STD-020C about floor life management & refer to JEDEC J-STD-033C about re-bake condition while IC’s floor life exceeds MSL3 limitation. Package Thickness Volume mm3 <350 Volume mm3 350-2000 Volume mm3 ≧2000 <1.6mm 260 +0 °C 260 +0 °C 260 +0 °C 1.6mm – 2.5mm 260 +0 °C 250 +0 °C 245 +0 °C ≧2.5mm 250 +0 °C 245 +0 °C 245 +0 °C *For details, please refer to Macroblock’s “Policy on Pb-free & Green Package”. 0 50 100 150 200 250 300 100 150 200 250 300 Temperature (℃) Time (sec) 217℃ 240℃ 255℃ Average ramp-up rate= 3.3℃/s Average ramp-up rate= 0.7℃/s 100s max 30s max Ramp-down 6℃/s (max) Peak Temperature 245℃~260℃< 10s ----Maximum peak temperature Recommended reflow profile 260℃+0℃ -5℃ 245℃±5℃ Acc.J-STD-020C Average ramp-up rate = 0.4℃/s JEDEC J-STD-020C

November 2014, V1.00 - 26 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Package Outline 注：轮廓图标的单位是mm。 MBI5252 GP Outline Drawing MBI5224GP 外观轮廓图示 b 0.008 — 0.012 0.203 — 0.305 c 0.007 — 0.010 0.178 — 0.254 e 0.635 BASIC L1 1.0414 BASIC Θ。 0— 80— 8

0.041 BASIC

Dimensions shown in inchs Dimensions shown in millimeters SYMBOLS

0.025 BASIC

November 2014, V1.00 - 27 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Note 1: The unit of the outline drawing is millimeter (mm). Note 2: The thermal pad size may exist a tolerance due to the manufacturing process, please use the maximum dimensions risk, the circuit traces shall not pass through the maximum area of thermal pad. MBI5252 GFN Outline Drawing MIN. NOM. MAX. A 0.70 0.75 0.80 A1 － 0.01 0.05 b 0.18 0.25 0.30 c 0.18 0.20 0.25 D 3.90 4.00 4.10 e Ne Nd E 3.90 4.00 4.10 L 0.35 0.40 0.45 h 0.30 0.35 0.40 2.50REF MILLIMETERSYMBOL 2.50REF 0.50BSC 2.50BSC 2.50BSC

November 2014, V1.00 - 28 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Product Top Mark Information Product Revision History Datasheet Version Devise Version Code V1.00 A Product Ordering Information Product Ordering Number* RoHS Compliant Package Type Weight (g) MBI5252GP-A SSOP24L-150-0.64 0.11 MBI5252GFN-A QFN24L-4*4-0.5 0.0379 *Please place your order with the “product ordering number” information on your purchase order (PO). Process Code Part number  ID number Manufacture Code Device Version Code The second row of printing The first row of printing Product No. Package Code MBIXXXX ○ ○○ Digits MBIXXXX ○ or

November 2014, V1.00 - 29 - 16-Channel PWM Constant Current LED Driver for 1:16 Time-multiplexing Applications MBI5252 Disclaimer Macroblock reserves the right to make changes, corrections, modifications, and improvements to their products and documents or discontinue any product or service. Customers are advised to consult their sales representative for the latest product information before ordering. All products are sold subject to t he terms and conditions supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. Macroblock’s products are not designed to be used as components in device intended to support or sustain life or in military applications. Use of Macroblock’s products in co mponents intended for surgical implant into the body, or other applications in which failure of Macroblock’s products could create a situation where personal death or injury may occur, is not authorized withou t the express written approval of t he Managing Director of Macroblock. Macroblock will not be held liable for an y damages or claims resulting from the use of its products in medical and military applications. Related technologies applied to the product are protec ted by patents. All text, images, logos and information contained on this document is the intellectual property of Macroblock. Unauthorized re production, duplication, extraction, use or disclosure of the above mentioned intellectual property will be deemed as infringement.

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16-Channel PWM Constant Current LED Driver for 1:16 Time-Multiplexing Applications November 2014, V1.00

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