TLC59401PWP datasheet by Texas Instruments

TLC59401PWP 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 reset and enable pins during power-up?
  The reset pin (RST) should be pulled low for at least 100 ns, then released, and then the enable pin (EN) should be pulled high. This ensures proper initialization of the device.
• What is the recommended value for the external resistor (RREF) connected to the IREF pin?
  The recommended value for RREF is 2.2 kΩ, but it can be adjusted based on the specific application's current requirements. A smaller RREF value increases the output current, while a larger value decreases it.
• How do I handle the thermal shutdown feature?
  The TLC59401PWP has a built-in thermal shutdown feature that disables the device when it overheats. To handle this, monitor the TSD (thermal shutdown) pin, which goes low when the device overheats. When TSD is low, stop sending data and wait for the device to cool down before re-enabling it.
• What is the purpose of the GSCLK (grayscale clock) pin?
  The GSCLK pin is used to update the grayscale data in the device. It should be pulsed high for at least 10 ns to latch the new grayscale data.