TLC5947DAPG4 datasheet by Texas Instruments

TLC5947DAPG4 Frequently Asked Questions (FAQs)

• What is the maximum frequency of the clock input?
  The maximum frequency of the clock input is 30 MHz, but it's recommended to keep it below 20 MHz for reliable operation.
• How do I handle the thermal shutdown feature?
  The TLC5947DAPG4 has a built-in thermal shutdown feature that turns off the device when it overheats. To handle this, you can monitor the TSD (Thermal Shutdown) pin, which goes low when the device is in thermal shutdown. You can also implement a thermal management system to reduce the device's temperature.
• What is the recommended layout for the device's power supply pins?
  It's recommended to use a solid ground plane and to place the power supply pins (VCC and GND) as close as possible to the device. Also, use a decoupling capacitor (e.g., 100 nF) between VCC and GND to reduce noise and improve stability.
• How do I program the grayscale data?
  The TLC5947DAPG4 uses a 12-bit grayscale data format. You can program the grayscale data using the GSCLK (Grayscale Clock) and GSIN (Grayscale Data Input) pins. The device latches the grayscale data on the rising edge of GSCLK, so make sure to send the data in the correct format and timing.
• What is the purpose of the OUTGRP (Output Group) pin?
  The OUTGRP pin is used to group multiple TLC5947DAPG4 devices together to control a larger number of LEDs. By connecting the OUTGRP pins of multiple devices, you can create a single output group that can be controlled by a single grayscale clock signal.