TLC5943PWPR datasheet by Texas Instruments

TLC5943PWPR Frequently Asked Questions (FAQs)

• What is the maximum frequency of the clock input?
  The maximum frequency of the clock input is 50 MHz, but it's recommended to keep it below 20 MHz for reliable operation.
• How do I ensure that the LED current is accurate and stable?
  To ensure accurate and stable LED current, make sure to use a high-quality external resistor (RREF) and keep the voltage supply (VCC) stable. Also, ensure that the device is operated within the recommended temperature range.
• What is the purpose of the OUTGRP pin?
  The OUTGRP pin is used to group multiple TLC5943 devices together to control a large number of LEDs. It allows the devices to be connected in a daisy-chain configuration, enabling the control of up to 48 LEDs.
• How do I handle the thermal shutdown protection feature?
  The TLC5943 has a built-in thermal shutdown protection feature that shuts down the device if it overheats. To handle this, ensure good thermal design and heat dissipation, and consider using a thermal monitoring circuit to detect and respond to overheating conditions.
• What is the recommended layout and routing for the TLC5943?
  For optimal performance, keep the power supply lines (VCC and GND) separate from the signal lines, and use a solid ground plane to reduce noise and electromagnetic interference (EMI). Also, keep the clock and data lines short and away from noisy signals.