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.
● 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% (Typical)
● Device-to-Device = ±2% (Typical)
● CMOS Logic Level I/O
● 30-MHz Data Transfer Rate (Standalone)
● 15-MHz Data Transfer Rate (Cascaded Devices,
●SCLK Duty = 50%)
● Shift Out Data Changes With Falling Edge to
●Avoid Data Shift Errors
● Auto Display Repeat
● 4-MHz Internal Oscillator
● Thermal Shutdown (TSD):
● Automatic Shutdown at OverTemperature Conditions
● Restart Under Normal Temperature
● Noise Reduction:
● 4-Channel Grouped Delay to Prevent Inrush Current
● Operating Temperature: 40°C to 85°C
