PMP31202

Four-phase buck converter 700-W reference design

PMP31202

Design files

Overview

This reference design is a 700-W buck converter using the LM5143A-Q1 device. Due to low dead times, ultra-strong drivers and the ability to adjust the rising and falling edges individually, the resulting efficiency is 98%. Because of reduced loss, the board area measures 150 mm × 125 mm, with a low profile of 12 mm or 15 mm, depending on the inductor selected. Ample headroom for increased output power is available by using forced cooling or a heat sink mounted to a chassis. Using additional cooling options, the output current can be increased to 60-A continuous and higher. The interleaved operation results in low root mean square (RMS) stress at the input capacitor and reduced ripple at the input and the output. A generic two stage EMI input filter is provided.

Features
  • Power supply delivers up to 700-W continuous and up to 1-kW peak output power.
  • The interleaved four-phase buck topology provides ripple rejection.
  • Suggestions for improving the mechanics for the thermal interface is provided.
  • This reference design is built and has been tested in a lab
Output voltage options PMP31202.1
Vin (Min) (V) 20
Vin (Max) (V) 28
Vout (Nom) (V) 13.8
Iout (Max) (A) 50
Output Power (W) 690
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Multiphase^Buck- Synchronous
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

PDF | HTML
TIDT315.PDF (1468 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDMB68.PDF (360 K)

Detailed schematic diagram for design layout and components

TIDMB69.PDF (239 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDMB70.PDF (358 K)

Detailed overview of design layout for component placement

TIDMB72.ZIP (1404 K)

Files used for 3D models or 2D drawings of IC components

TIDCGC4.ZIP (239 K)

Design file that contains information on physical board layer of design PCB

TIDMB71.PDF (1921 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

AC/DC & DC/DC controllers (external FET)

LM251433.5-V to 42-V, dual-output, stackable, synchronous buck DC/DC controller with ultra-low IQ

Data sheet: PDF | HTML
AC/DC & DC/DC controllers (external FET)

LM25143-Q1Automotive, 3.5-V to 42-V low-Iq, dual output, stackable synchronous buck DC-DC controller

Data sheet: PDF | HTML

Start development

Software

Calculation tool

LM5143DESIGN-CALC LM5143-Q1 Controller Quickstart Design Tool

This stand-alone tool facilitates and assists with the design of a DC/DC buck regulator based on the LM5143-Q1 synchronous buck DC/DC controller with low IQ. The user can expeditiously arrive at an optimized design to meet the application requirements.

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
LM25143 3.5-V to 42-V, dual-output, stackable, synchronous buck DC/DC controller with ultra-low IQ LM25143-Q1 Automotive, 3.5-V to 42-V low-Iq, dual output, stackable synchronous buck DC-DC controller LM5143 3.5-V to 65-V, dual-output, stackable, synchronous buck DC/DC controller with ultra-low IQ LM5143-Q1 3.5-V to 65-V low Iq, dual, 2-phase synchronous buck DC-DC controller LM5143A-Q1 Automotive, 3.5-V to 65-V low-IQ, dual output, stackable synchronous buck DC-DC controller
Hardware development
Evaluation board
LM5143-Q1EVM-2100 Dual-channel automotive synchronous buck controller evaluation module
Software
Calculation tool
LM5143DESIGN-CALC LM5143-Q1, LM5143A-Q1, LM5143, LM25143-Q1 and LM25143 controller quick start design tool

Technical documentation

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Type Title Date
Test report 4-Phase Buck 700-W Reference Design PDF | HTML Dec. 07, 2022

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