SNVSCY9A January   2025  – July 2025 TLC69638-Q1

PRODMIX  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  5. 4Device Comparison
  6. 5Device and Documentation Support
    1. 5.1 Receiving Notification of Documentation Updates
    2. 5.2 Support Resources
    3. 5.3 Trademarks
    4. 5.4 Electrostatic Discharge Caution
    5. 5.5 Glossary
  7. 6Revision History
  8. 7Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

3 Description

The TLC69638-Q1 is an LED driver with 48 constant current sink channels, which can provide up to 16-bit individual pixel-level LED PWM control. The additional 7-bit dot correction (DC) is also implemented to each channel to control peak current. Each device shares data stream by serial peripheral interface (SPI), which supports up to 511 devices connection. The interface is software compatible with LED drivers in the same group which can be applied to different application scenarios based on LED current and total LED number.

To optimize overall systematic power efficiency, the device is equipped with adaptive headroom voltage control (AHVC) scheme to optimize headroom voltage across each channel and device. Only the OUT47 pin from the last device of daisy chain is required to be programmed as FB pin to optimize LED supply voltage from DC/DC.

The TLC69638-Q1 is equipped diagnostics for LED, current sink, communication, and device.

Package Information
PART NUMBER PACKAGE(1) PACKAGE SIZE(2)
TLC69638-Q1 RTQ (VQFN, 56)
wettable flank		 8mm × 8mm
DCA (HTSSOP, 56) 14mm × 8.1mm
DFD (HTSSOP, 56)
(1) For more information, see Section 7.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
TLC69638-Q1 Simplified Schematic Simplified Schematic