ZHCU741 July   2020

 

  1.   说明
  2.   资源
  3.   特性
  4.   应用
  5.   5
  6. 1System Description
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 PCB Assembly
      2. 2.2.2 Top Side of PCB Assembly
    3. 2.3 Highlighted Products
      1. 2.3.1 TPS92682-Q1
      2. 2.3.2 TPS92682-Q1
      3. 2.3.3 TPS92520-Q1
      4. 2.3.4 MSP432
      5. 2.3.5 System Design Theory
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
      1. 3.1.1 CISPR 25 Class 5 Test Setup
      2. 3.1.2 LED Load Board Top
      3. 3.1.3 LED Load Board Bottom
    2. 3.2 Test Setup
    3. 3.3 Test Results
      1. 3.3.1  Boost Turn on Delay
      2. 3.3.2  Highbeam/Lowbeam Turn on Delay
      3. 3.3.3  Highbeam/Lowbeam Switch Node and Ripple Current
      4. 3.3.4  Turn Indicator Turn on Delay
      5. 3.3.5  Turn Indictor Turn Off Delay
      6. 3.3.6  Turn Indicator 1.5 Hz Operation
      7. 3.3.7  Turn Indicator Output Voltage and Current
      8. 3.3.8  Daytime Running Light Turn-on Delay
      9. 3.3.9  Daytime Running Light Switch Node and Output Current
      10. 3.3.10 Highbeam/Lowbeam LED Short
      11. 3.3.11 Highbeam/Lowbeam Fault Indicator
      12. 3.3.12 Turn Indicator Fault Output
      13. 3.3.13 TPS92682-Q1 Boost and SEPIC Interleaving
      14. 3.3.14 TIDA-050040 Full Load Efficiency
      15. 3.3.15 Efficiency Highbeam/Lowbeam
      16. 3.3.16 Efficiency Turn Indicator and Daytime Running Light
      17. 3.3.17 Efficiency Highbeam/Lowbeam and Turn Indicator
      18. 3.3.18 CISPR 25 Class 5 EMI Scan
      19. 3.3.19 Top Side Thermal Image DRL at 15W
      20. 3.3.20 Bottom side thermal image DRL at 15W
      21. 3.3.21 Top Side Thermal Image Highbeam/Lowbeam at 30W, Turn Indicator at 7.5W average
      22. 3.3.22 Bottom Side Thermal Image Highbeam/Lowbeam at 30W, Turn Indicator at 7.5W average
  9. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 BOM
    2. 4.2 Documentation Support
    3. 4.3 Support Resources
    4. 4.4 Trademarks

说明

此参考设计展示了适用于前照灯应用、完全自运行的三通道 TPS92682-Q1 和 TPS92520-Q1 LED 驱动器。此设计用于替换与汽车车身控制模块兼容的低成本卤素前照灯模块。三个 LED 通道可驱动远光灯/近光灯、转向灯、日间行车灯和位置标志灯。此设计将一个 TPS92682-Q1 双通道控制器用作恒压升压转换器和恒流 SEPIC 转换器。它还将一个通过升压转换器供电的 TPS92520-Q1 用于两个同步整流的恒流降压转换器。该电路板使用接地片设计，可包含功率级，从而符合 EMI 标准（包括 CISPR 25 5 类传导标准）。