SDAA082 August   2025 TLC69601-Q1 , TLC69604-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Long CCSI Daisy Chain Challenges
    1. 2.1 CCSI CLK_O Duty Cycle Increase Issues
    2. 2.2 CCSI Frequency Design Consideration
  6. 3TLC69699-Q1 Connectivity IC Design
    1. 3.1 CCSI Control on the CLK_O Duty Cycle and Data Rate
    2. 3.2 Optimized Fault Readback Scheme with FAULT Signal
    3. 3.3 TXFIFO Configuration
  7. 4Summary
  8. 5References

3 TLC69699-Q1 Connectivity IC Design

The TLC69699-Q1 is an SPI-compatible connectivity IC between an SPI and a Continuous Clock Serial Interface (CCSI). This is designed to solve the CCSI compatibility challenge with some SPI-interface TCON as shown in Figure 3-1. Adding additional TLC69699-Q1 between the host controller and the original LED driver daisy chain can help solve the CLK_O duty cycle increase limit in three ways:

  1. Reducing the high-level duty cycle of CLKI and then forward to the first LED driver;
  2. Saving time for polling the LOD, LSD, TSD and status every frame with fault interrupt feature;
  3. Reducing the CCSI output frequency in internal TXFIFO.
TLC69699-Q1 Typical Application Figure 3-1 TLC69699-Q1 Typical Application