TI TLC5947DAP

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 overtemperature 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

• Static LED Displays
• Message Boards
• Amusement Illumination
• TV Backlighting