TLC5902

双通道高速 MOSFET 驱动器

The 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.

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80 mA × 16 Bits and 120 mA × 8 Bits

Drive Capability and Output Counts

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5 mA to 80 mA/10 mA to 120 mA Constant Current Output Range

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Constant Currency Accuracy of ±4% Maximum Error Between Bits

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Constant Current Output Terminals

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0.4 V Output Current 0 to 40 mA

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0.7 V Output Current 40 to 80 mA

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256 Gray Scale Display With Pulse Width Control 256 Steps

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Brightness Adjustment

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Output Current Adjustment for 32 Steps Adjustment for Brightness Deviation Between LEDs

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8 Steps Brightness Control by 8 Times Speed Gray Scale Control Clock Brightness Adjustment for Panel

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Protection

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WDT Function

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TSD Function

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Clock Synchronized 8-Bit Parallel Input

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Anode Common LED Type Applied

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CMOS Input Signal Level Schmitt-Triggered Input for All Input Terminals

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4.5 V to 5.5 V Power Supply Voltage

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15 V Maximum Output Voltage

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15 MHz Maximum Data Transfer Rate

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4 MHz Maximum Gray Scale Clock Frequency

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-20°C to 85°C Operating Free-Air Temperature Range

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100-Pin HTQFP Package

PD = 4.7 W, TA = 25°C