Wide-Input Isolated IGBT Gate-Drive Fly-Buck Power Supply for Three-Phase Inverters Reference Design TIDA-00199 (ACTIVE)

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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.


• 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  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

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LM5160A Download Download

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

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