ZHCU739 April   2020

 

  1.    说明
  2.    资源
  3.    特性
  4.    应用
  5. 1设计图像
  6. 2System Description
    1. 2.1 Key System Specifications
  7. 3System Overview
    1. 3.1 Block Diagram
    2. 3.2 Design Considerations
    3. 3.3 Highlighted Products
  8. 4Hardware, Testing Requirements, and Test Results
    1. 4.1 Required Hardware
    2. 4.2 Testing and Results
      1. 4.2.1 Test Setup
      2. 4.2.2 Test Results
  9. 5Design Files
    1. 5.1 Schematics
    2. 5.2 Bill of Materials
    3. 5.3 PCB Layout print
    4. 5.4 Altium Project
    5. 5.5 Gerber Files
    6. 5.6 Assembly Drawings
  10. 6Related Documentation
    1. 6.1 商标
    2. 6.2 Third-Party Products Disclaimer

2 System Description

In an automotive rear lamp application, long cables are used to connect the battery to a LED module. The noise generated by RF electromagnetic fields frequently degrades the performance of the electronic device by generating CM currents on cables. The effect of noise on rear lamp system can be simulated well by injecting common mode current to the cables of the equipment. Several automotive standards, such as ISO11452, define methods to evaluate the immunity levels of electronic devices. ISO11452-4 defines procedure and several different levels for conducting immunity testing of wiring harnesses in the frequency range of 1-400MHz.

This reference design incorporates 4 single-channel LED drivers with fault bus. It can pass the ISO11452-4 200mA level substitution method and HKMC ES96200 standard BCI test.