System LED Drivers for Mobile Phones 7x17(Max.) Dot Matrix LED Display Driver No.10041EAT01 BD26502GUL Description BD26502GUL is Matrix LED Driver that is the most suitable for the cellular phone. It can control 7x17(119 dot) LED Matrix by internal 7-channel PMOS SWs and 17-channel LED drivers. It can control the luminance and firefly lighting of the LED matrix by the setting of the internal register. It supports SPI and I2C interface. VCSP50L4 (4.1mm 0.55mm height max), small and thin type chip size package. It adopts the very thin CSP package that is the most suitable for the slim phone. Features 1) LED Matrix driver (7x17) It has 7-channel PMOS SWs and 17-channel current drivers with 1/7 timing driven sequentially. Put ON/OFF(for every dot). The current drivers can drive 0-20.00mA current with 16 step(for every dot). 64 steps of the luminance control by PWM (common setting for all dots) Continuous (TDMA off ) lighting function for LED14-LED17 Easy register setting by A/B 2-side map for each dot. 2) Automatic Slope function Cycle time, Slope time can be set for each dot. 3) 8-direction automatic scroll function. 4) Interface 2 SPI and I C BUS FS mode(max 400kHz)Compatibility 2 2 For I C mode, I C Device address is selectable (74h or 75h) 5) Thermal shutdown 6) Small and thin CSP package 2 62pin VCSP50L4(4.1mm 0.55mm height max) *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. o Absolute Maximum Ratings (Ta=25 C) Parameter Symbol Ratings Unit Maximum voltage (note2) VMAX 7 V Maximum voltage (note1) VIOMAX 4.5 V Power Dissipation (note3) Pd 1550 mW Operating Temperature Range Topr -40 ~ +85 Storage Temperature Range Tstg -55 ~ +150 note1) VIO,RESETB,CE,SDA,SCL,IFMODE,SYNC,CLKIN,CLKOUT,TEST1,TEST2,TEST3,TESTO, DO terminal note2) Except the above o o note3) Power dissipation deleting is 12.4mW/ C , when its used in over 25 C. (ROHMs standard board has been mounted.) The power dissipation of the IC has to be less than the one of the package. o Operating Conditions (VBAT VIO, VINSW VBAT, Ta=-40~85 C) Parameter Symbol Limits Unit VBAT input voltage VBAT 2.7 ~ 5.5 V VINSW input voltage VINSW 2.7 ~ 5.5 V VIO pin voltage VIO 1.65 ~ 3.3 V www.rohm.com 2010.02 - Rev.A 1/39 2010 ROHM Co., Ltd. All rights reserved. Technical Note BD26502GUL Electrical Characteristics (Unless otherwise specified, Ta=25C, VBAT=3.6V, VINSW=3.6V, VIO=1.8V) Limit Parameter Symbol Unit Condition Min. Typ. Max. Circuit Current VBAT Circuit current 1 IBAT1 - 0 3.0 A RESETB=0V, VIO=0V VBAT Circuit current 2 IBAT2 - 0.8 5.0 A RESETB=0V, VIO=1.8V When LED1-17 are active VBAT Circuit current 3 IBAT3 - 2.0 3.5 mA with default settings. UVLO UVLO Threshold VUVLO - 2.1 2.5 V VBAT falling UVLO Hysteresis VHYUVLO 50 - - mV LED Driver (LED1-17) Maximum output current ILEDMax - 20.00 - mALED1-17 ,ISET100k Output current ILED -7.0% 10.67 +7.0% mA I=10.67mA setting, VLED=1V ILEDMT= LED current Matching ILEDMT - - 5 % (ILEDMax-ILEDMin)/(ILEDMax+ILEDMin) I=10.67mA setting, VLED=1V Driver pin voltage range VLED 0.2 - VBAT- 1.4 V LED OFF Leak current ILKLED - - 1.0 A PMOS switch Leak current at OFF ILEAKP - - 1.0 A Resistor at ON RonP - 1.0 - Isw=170mA, VINSW=4.5V OSC OSC frequency fosc 0.96 1.2 1.44 MHz CE, SYNC, CLKIN, IFMODE L level input voltage VIL1 -0.3 - 0.25 x VIO V H level input voltage VIH1 0.75 x VIO - VIO +0.3 V L level input current IIL1 - 0 1 A H level input current IIH1 - 0 1 A SDA, SCL L level input voltage VIL2 -0.3 - 0.25 x VIO V H level input voltage VIH2 0.75 x VIO - VIO +0.3 V Input hysteresis Vhys 0.05 x VIO - - V L level output voltage VOL2 0 - 0.3 V At 3mA sink current (for SDA pin) Input current Iin1 -3 - 3 A Input voltage = from (0.1 x VIO) to (0.9 x VIO) RESETB L level input voltage VIL3 -0.3 - 0.25 x VIO V H level input voltage VIH3 0.75 x VIO - VIO +0.3 V Input current Iin2 - 0 1 A Input voltage = from (0.1 x VIO) to (0.9 x VIO) CLKOUT L level output voltage VOL1 - - 0.4 V IOL=2mA H level output voltage VOH1 0.75 x VIO - - V IOH=-2mA www.rohm.com 2010.02 - Rev.A 2/39 2010 ROHM Co., Ltd. All rights reserved.