• Menu
  • Product
  • Email
  • PDF
  • Order now

  • 150-W Dual-Phase Synchronous Buck Converter Reference Design for Automotive Applications

    • TIDT363 December   2023

       

  • CONTENTS
  • SEARCH
  • 150-W Dual-Phase Synchronous Buck Converter Reference Design for Automotive Applications
  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Considerations
    3. 1.3 Dimensions
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
    4. 2.4 EMI
      1. 2.4.1 Conducted Emissions
        1. 2.4.1.1 Noise Floor
        2. 2.4.1.2 Conducted Emissions Measurement
      2. 2.4.2 Radiated Emissions
        1. 2.4.2.1 Frequencies of 150 kHz to 30 MHz
          1. 2.4.2.1.1 Noise Floor
          2. 2.4.2.1.2 Emissions
        2. 2.4.2.2 Frequencies of 30 MHz to 200 MHz
          1. 2.4.2.2.1 Horizontal Polarization
            1. 2.4.2.2.1.1 Noise Floor
            2. 2.4.2.2.1.2 Emissions
          2. 2.4.2.2.2 Vertical Polarizations
            1. 2.4.2.2.2.1 Noise Floor
            2. 2.4.2.2.2.2 Emissions
        3. 2.4.2.3 Frequencies from 200 MHz to 1 GHz
          1. 2.4.2.3.1 Horizontal Polarization
            1. 2.4.2.3.1.1 Noise Floor
            2. 2.4.2.3.1.2 Emissions
          2. 2.4.2.3.2 Vertical Polarization
            1. 2.4.2.3.2.1 Noise Floor
            2. 2.4.2.3.2.2 Emissions
  7. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Load Transients
    3. 3.3 Start-Up
  8. IMPORTANT NOTICE
search No matches found.
  • Full reading width
    • Full reading width
    • Comfortable reading width
    • Expanded reading width
  • Card for each section
  • Card with all content

 

Test Report

150-W Dual-Phase Synchronous Buck Converter Reference Design for Automotive Applications

Description

This CISPR 25 Class 5 rated design showcases a dual-phase buck converter, which can also be used as a dual-output converter. As a dual-phase converter, the circuit can provide a continuous output current of 22 A with 30 A peak in a 12-V to 5-V configuration.

The main goal of this design is to provide good electromagnetic interference (EMI) performance to help the system integrator with EMI mitigation.

Features

  • 150-W peak output power (5-V single output configuration)
  • 110-W continuous output power (5-V single output configuration)
  • Circuit has an input protection
  • Pre-compliance-tested to pass CISPR 25 Class 5

Applications

  • Body electronics and lighting
GUID-20231110-SS0I-D6QB-TCLH-ZG22QGSJZFDG-low.jpgTop Photo
GUID-20231110-SS0I-VQGQ-GLVB-NV24P6JJDLWR-low.jpgAngled Photo
GUID-20231110-SS0I-0SQG-VBND-TMHW4X41G1MK-low.jpgBottom Photo

1 Test Prerequisites

1.1 Voltage and Current Requirements

Table 1-1 Voltage and Current Requirements
Device Input Voltage Output Voltage, Maximum Current
LM5148-Q1 6 V to 16 V, 36-V peak 5 V, 22-A continuous, 30-A peak
LM74912-Q1 6 V to 16 V, 36-V peak 6 V to 16 V, 36-V peak

1.2 Considerations

Unless otherwise noted, the input voltage for testing was set to 12 V. The converter was configured to run in forced frequency pulse modulation (FPWM) operation during all tests.

 
Texas Instruments

© Copyright 1995-2025 Texas Instruments Incorporated. All rights reserved.
Submit documentation feedback | IMPORTANT NOTICE | Trademarks | Privacy policy | Cookie policy | Terms of use | Terms of sale