Wide-Input Isolated IGBT Gate-Drive Fly-Buck Power Supply for Three-Phase Inverters Reference Design

(ACTIVE) TIDA-00199

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Key Document

Description

This reference design provides isolated positive and negative voltage rails required for Insulated Gate Bipolar Transistor (IGBT) gate drivers from a single 24-volt DC input supply. Utilizing a Fly-Buck™ control topology, this reference design uses a single transformer for generating power rails for all three arms of the 3-phase inverter.  It uses primary-side regulation and can achieve good cross regulation without opto-coupler feedback or an auxiliary winding. The isolated outputs are generated through the coupled windings of the transformer. The voltage rails for all the high-side IGBTs are individually isolated, whereas the voltage rails for all low-side IGBTs are combined.

Features

• Isolated power supply with 24V±20% input range that supports 6 IGBT gate drivers for 3-phase inverter (each arm in half-bridge configuration)
• Low-ripple (<200mV) bias outputs (+15V & -8V) with output power of 2.3W for each IGBT of the 3-phase inverter
• Fly-Buck topology provides easy-to-design multi-output isolated power supply solution with primary side regulation
• Peak efficiency of 82% at balanced full-load
• Output capacitors rated to support up to 6A peak gate drive current


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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5160  LM5160 Wide Input 65V, 2A Synchronous Buck/Fly-Buck™ Converter  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
LM5160A  LM5160A Wide Input 65V, 2A Synchronous Buck / Fly-Buck™ Converter  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5160 Download Download
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LM5160A Download Download

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Technical Documents

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Application notes (2)
Title Abstract Type Size (KB) Date Views
PDF 7246 06 Jul 2015 0
PDF 115 12 Mar 2015 0
User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 2847 27 Jan 2015 0
White papers (1)
Title Abstract Type Size (KB) Date Views
PDF 980 29 Sep 2015 0
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 348 19 Dec 2014 0
ZIP 1352 19 Dec 2014 0
PDF 733 19 Dec 2014 0
PDF 148 19 Dec 2014 0
PDF 61 19 Dec 2014 0
PDF 186 19 Dec 2014 0
More literature (1)
Title Abstract Type Size (KB) Date Views
PDF 587 03 Dec 2015 0
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Reference Designs  ( 2 )


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