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PMP23392

Dual-phase buck converter reference design using GaN FETs for 48V automotive applications

PMP23392

Design files

Overview

This reference design utilizes two LM5148-Q1 single-phase synchronous buck controllers and four LMG3100R017 GaN FETs configured as a dual-phase, interleaved, synchronous buck converter. The converter generates a regulated 5V output capable of delivering a nominal 30A of current to the load, with a peak current capability of 60A, accepting an input voltage of between 24Vin to 60Vin (48Vin nominal). The design is built on a 6-layer PCB with 2-oz copper for each of the six layers. The evaluation board measures 5.0” x 3.4” (127.00mm x 86.36mm), however the actual converter solution size measures approximately 53.5mm x 52.0mm. This board is optimized for high efficiency across the entire load current range, which is achieved by configuring the converter to run in Pulse Frequency Modulation (PFM) mode at light loads.

Features
  • Small solution size
  • High efficiency
  • Spread-spectrum switching reduces EMI
  • Interleaved two-phase operation reduces ripple voltages and RMS currents
Output voltage options PMP23392.1
Vin (Min) (V) 24
Vin (Max) (V) 60
Vout (Nom) (V) 5
Iout (Max) (A) 60
Output Power (W) 300
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Boost- 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
TIDT388.PDF (2035 K)

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

TIDMCM9.PDF (579 K)

Detailed schematic diagram for design layout and components

TIDMCN0.PDF (159 K)

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

TIDMCN1.PDF (429 K)

Detailed overview of design layout for component placement

TIDMCN3.ZIP (2616 K)

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

TIDCGM9.ZIP (852 K)

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

TIDMCN2.PDF (2612 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)

LM5148-Q1Automotive, 80V synchronous buck DC/DC controller with ultra-low IQ

Data sheet: PDF | HTML
Gallium nitride (GaN) power stages

LMG3100R017100V 1.7mΩ GaN FET with integrated driver

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report Dual-Phase Buck Converter Reference Design Using GaN FETs for 48V Automotive Applications PDF | HTML Feb. 16, 2024

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