ChongMing Group (HK) Int'l Co., Ltd
CHONGMING GROUP (HK) INT'L CO., LTD.
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FEATURES
• 24 Channels, Constant Current Sink Output
•30-mA Capability (Constant Current Sink)
• 12-Bit (4096 Steps) PWM Grayscale Control
• LED Power-Supply Voltage up to 30 V
• VCC = 3.0 V to 5.5 V
•Constant Current Accuracy:
– Channel-to-Channel = ±2% (typ)
– Device-to-Device = ±2% (typ)
•CMOS Logic Level I/O
DESCRIPTION
The TLC5947 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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