TLC5947RHBRG4 datasheet by Texas Instruments

TLC5947RHBRG4 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, BLANK, and XLAT signals?
  The recommended sequence is: GSCLK low, BLANK high, XLAT low, then GSCLK high. This ensures proper data loading and blanking.
• What is the purpose of the OUTGRP pin?
  The OUTGRP pin is used to group multiple TLC5947 devices together, allowing them to be controlled as a single unit. It's used for dot correction and grayscale data loading.
• How do I handle thermal shutdown and overtemperature protection?
  The TLC5947 has a built-in thermal shutdown feature that disables the output drivers when the junction temperature exceeds 150°C. To handle this, monitor the THERMAL_METAL flag and take corrective action, such as reducing the output current or shutting down the device.
• What is the recommended layout and routing for the TLC5947?
  Keep the GSCLK, BLANK, and XLAT signals short and away from noisy signals. Use a solid ground plane and decouple the power supply with capacitors. Keep the output traces short and matched to minimize electromagnetic interference (EMI).