TLC5947

24通道，12位PWM LED驱动器 24-Channel, 12-Bit PWM LED Driver with

The is a 24-channel, constant-current sink LED driver. Each channel is individually adjustable with 4096 pulse-width modulated PWM steps. PWM control is repeated automatically with the programmed grayscale GS data. GS data are written via a serial interface port. The current value of all 24 channels is set by a single external resistor.

The TLC5947 has a thermal shutdown TSD function that turns off all output drivers during an over-temperature condition. All of the output drivers automatically restart when the temperature returns to normal conditions.

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24 Channels, Constant-Current Sink Output

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30-mA Capability Constant-Current Sink

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12-Bit 4096 Steps PWM Grayscale Control

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LED Power-Supply Voltage Up to 30 V

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VCC = 3.0 V to 5.5 V

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Constant-Current Accuracy:

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Channel-to-Channel = ±2% Typical

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Device-to-Device = ±2% Typical

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CMOS Logic Level I/O

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30-MHz Data Transfer Rate Standalone

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15-MHz Data Transfer Rate Cascaded Devices,

SCLK Duty = 50%

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Shift Out Data Changes With Falling Edge to

Avoid Data Shift Errors

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Auto Display Repeat

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4-MHz Internal Oscillator

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Thermal Shutdown TSD:

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Automatic Shutdown at OverTemperature Conditions

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Restart Under Normal Temperature

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Noise Reduction:

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4-Channel Grouped Delay to Prevent Inrush Current

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Operating Temperature: –40°C to 85°C