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  • 200-W Automotive 2-Phase Synchronous Buck Converter Reference Design

    • TIDT318 January   2023

       

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  • 200-W Automotive 2-Phase Synchronous Buck Converter Reference Design
  1.   Description
  2.   Features
  3.   Applications
  4. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
    4. 1.4 Dimensions
    5. 1.5 Test Setup
  5. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Thermal Images
    3. 2.3 Bode Plots
  6. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Load Transients
  7. IMPORTANT NOTICE
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TEST REPORT

200-W Automotive 2-Phase Synchronous Buck Converter Reference Design

Description

This reference design provides power for automotive advanced driver assistance systems (ADAS), infotainment, and cluster applications. Operation is over the full automotive range including battery voltage surges to 32 V and dips to 6 V due to cold cranking. The peak conversion efficiency of 94% to 96% in the 10 VIN to 18 VIN range is shown. The output voltage undershoot and overshoot are 2% for 30-A step and dump. This test report includes operational data over the full input range and includes Bode plots to verify stability with good margins, internal waveforms, and thermal images.

Features

  • High current for advanced driver assistance systems (ADAS), infotainment, and cluster applications
  • Operation over the full automotive battery range including cold cranking and surges
  • Peak conversion efficiency of 94% to 96% in the 10- to 18-VIN range
  • LM25143-Q1 provides two-phase control and gate drive in a single IC
  • Output voltage undershoot and overshoot 2% for 30-A step and dump

Applications

  • Driver monitoring
  • Surround view system ECU
  • Radar ECU
  • ADAS domain controller
  • Drive assist ECU
  • Hybrid instrument cluster
  • Digital cockpit processing unit
GUID-20221228-SS0I-LWNS-NVHM-XSHBKSCXR15G-low.jpgTop Photo
GUID-20221228-SS0I-D7QZ-NXR5-HVQC1BXVLZNR-low.jpgBottom Photo

1 Test Prerequisites

This section provides the testing guide used in the detailed testing of the 3.3-V, 60-A power supply.

 

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