Half-bridge point-of-load converter reference design with GaN technology
PMP22089
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Key Document

Description

This reference design modifies the inboard transformer turns ratio from 5:1 to 3:1 to reduce input the range. The board supports input voltages from 24 V to 32 V and output voltages between 0.5 V to 1.0 V with output currents up to 40 A. This topology efficiently supports the high step-down ratio while providing significant output current and controllability. The original EVM was designed to evaluate the LMG5200 GaN half-bridge power stage and the TPS53632G half-bridge point-of-load (PoL) controller. This board implements the converter as a single-stage hard-switched half-bridge with a current-doubler rectifier.  The board is a redesign of the LMG5200POLEVM-10 evaluation module.

Features
  • Low-voltage, high-current capability supporting FPGA PoLs
  • High power density using GaN FETs
  • Integrated planar transformer

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Schematic/Block Diagram

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Design Guide

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Design Files

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Parametrics
 PMP22089.1
(Output Voltage 1)
Vin (Min) (V)24
Vin (Max) (V)32
Vout (Nom) (V).85
Iout (Max) (A)40
Output Power (W)34
Isolated/Non-IsolatedNon-Isolated
Input TypeDC
TopologyHalf Bridge- Hard Switched

TI Devices (7)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD16321Q5  25V, N ch NexFET MOSFET™, single SON5x6, 2.6mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
LMC555  World’s smallest 555 timer with low power, high accuracy and a Fmax of 3MHz  Clocks & timing  Sample & Buy View Design Kits & Evaluation Modules
LMG5200  80V GaN Half Bridge Power Stage  Power management  Sample & Buy View Design Kits & Evaluation Modules
LP2992  250-mA, 16-V, low-dropout voltage regulator with enable  Power management  Sample & Buy View Design Kits & Evaluation Modules
LP38693  500-mA, 10-V, low-dropout voltage regulator with enable  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS53632G  Half-bridge, D-CAP+ controller for 48-V GaN DC/DC converter  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
UCC27512  4-A/8-A single-channel gate driver with 5-V UVLO and split outputs in SON package  Gate drivers  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD16321Q5 Download Download
LMC555 Download Download
Download
Download
LMG5200 Download -
LP2992 Download Download
Download Download
LP38693 Download Download
Download Download
TPS53632G Download
UCC27512 Download -

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 2666 17 Dec 2019
Design files (6)
Title Type Size (KB) Date
ZIP 359 17 Dec 2019
ZIP 1606 17 Dec 2019
PDF 1982 17 Dec 2019
PDF 198 17 Dec 2019
PDF 59 17 Dec 2019
PDF 311 17 Dec 2019

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