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TLC5902 PDF预览

TLC5902

更新时间: 2024-02-22 07:08:40
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德州仪器 - TI 驱动器
页数 文件大小 规格书
22页 307K
描述
LED DRIVER

TLC5902 数据手册

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TLC5902  
LED DRIVER  
SLLS382 – DECEMBER 1999  
80 mA × 16 Bits and 120 mA × 8 Bits  
Protection  
Drive Capability and Output Counts  
– WDT Function  
– TSD Function  
5 mA to 80 mA/10 mA to 120 mA Constant  
Current Output Range  
Clock Synchronized 8-Bit Parallel Input  
Anode Common LED Type Applied  
Constant Currency Accuracy of ±4%  
(Maximum Error Between Bits)  
CMOS Input Signal Level  
(Schmitt-Triggered Input for All Input  
Terminals)  
Constant Current Output Terminals  
– 0.4 V (Output Current 0 to 40 mA)  
– 0.7 V (Output Current 40 to 80 mA)  
4.5 V to 5.5 V Power Supply Voltage  
15 V Maximum Output Voltage  
256 Gray Scale Display With Pulse Width  
Control 256 Steps  
15 MHz Maximum Data Transfer Rate  
Brightness Adjustment  
4 MHz Maximum Gray Scale Clock  
Frequency  
– Output Current Adjustment for 32 Steps  
(Adjustment for Brightness Deviation  
Between LEDs)  
– 8 Steps Brightness Control by 8 Times  
Speed Gray Scale Control Clock  
(Brightness Adjustment for Panel)  
–20°C to 85°C Operating Free-Air  
Temperature Range  
100-Pin HTQFP Package  
(PD = 4.7 W, T = 25°C)  
A
description  
The TLC5902 is a constant current driver that incorporates shift register, data latch, and constant current  
circuitry with a current value adjustable and 256 gray-scale display that uses pulse width control. The output  
current can be selected as maximum 80 mA with 16 bits or 120 mA with 8 bits. The current value of the constant  
current output is set by one external resister. After this device is mounted on a printed-circuit board (PCB), the  
brightness deviation between LEDs (ICs) can be adjusted using an external data input, and the brightness  
control for the panel can be adjusted using the brightness adjustment circuitry. Moreover, the device  
incorporates watchdog timer (WDT) circuitry, which turns the constant current output off when the scan signal  
is stopped during dynamic scanning operation, and thermal shutdown (TSD) circuitry, which turns constant  
current output off when the junction temperature exceeds the limit.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
Copyright 1999, Texas Instruments Incorporated  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  

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