SLVAFG5 November   2022 TPS929240-Q1

 

  1.   Abstract
  2.   Trademarks
  3. 1Introduction
    1. 1.1 Device Overview
    2. 1.2 BCI Test Method
  4. 2PCB Design Recommendation
    1. 2.1 Schematic Design
    2. 2.2 Layout Design
  5. 3BCI Test
    1. 3.1 Test Set-up
    2. 3.2 Test Results
  6. 4Summary
  7. 5References

1.1 Device Overview

The TPS929240-Q1 is a 24-channel, 40-V high-side automotive LED driver with FlexWire interface to address increasing requirements for pixel control of each LED string. Each of the device channels features various diagnostics including LED open-circuit, short-to-ground, single LED short-circuit detection and can support both analog dimming and PWM dimming. The internal user-programmable EEPROM allows automatic switching to FAIL-SAFE states in the case of communication loss to meet system level safety requirements. Figure 1-1 shows a typical application diagram.

Compared with traditional single ended interface, by using a CAN physical layer the UART-based FlexWire interface of the TPS929240-Q1 is much easier to accomplish long distance off-board communication without impacting EMC and BCI.

Figure 1-1 TPS929240-Q1 Typical Application Diagram