TLC59461PWP datasheet by Texas Instruments

TLC59461PWP 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 properly sequence the GSCLK, SCLK, and XLAT signals?
  The recommended sequence is: GSCLK low, SCLK low, XLAT high, then GSCLK high, SCLK high, and finally XLAT low. This ensures proper data loading and latch operation.
• What is the purpose of the VPRG pin, and how do I use it?
  The VPRG pin is used to set the internal voltage reference for the grayscale PWM generator. Connect it to a voltage source between 1.2V and 3.3V to set the reference voltage, or leave it open for a default internal reference of 1.2V.
• How do I handle the thermal shutdown feature?
  The TLC59461PWP has a built-in thermal shutdown feature that disables the device when it overheats. To handle this, monitor the TSD pin, which goes low when the device is in thermal shutdown. When this occurs, stop sending data and wait for the device to cool down before resuming operation.
• What is the recommended layout and routing for the TLC59461PWP?
  Keep the GSCLK, SCLK, and XLAT signals short and away from noisy signals. Use a solid ground plane and decouple the power supply with a 0.1uF capacitor. Also, keep the OUTx pins away from the power supply and ground pins to minimize noise coupling.