TIDA-00917

Gate Driver Reference Design for Parallel IGBTs With Short-Circuit Protection and Current Buffer

TIDA-00917

Design files

Overview

Paralleling insulated-gate bipolar transistors (IGBTs) becomes necessary for power conversion equipment with higher output power ratings, where a single IGBT cannot provide the required load current. This reference design implements a reinforced isolated IGBT gate control module to drive parallel IGBTs in half-bridge configuration. Paralleling IGBTs introduces challenges at both gate driver (insufficient drive strength) as well as at system level in maintaining equal current distribution in both the IGBT’s while ensuring faster turn on and off. This reference design uses reinforced isolated IGBT gate driver with integrated features like desaturation detection and soft turn off to protect the IGBT during fault conditions. Increased gate drive current (15 A) is obtained through external BJT current booster stage without sacrificing the soft turn off feature. Furthermore, this design demonstrates the mechanism of avoiding gate current loops while operating IGBTs in parallel.

Features
  • Designed to drive parallel IGBT modules of 1200-V rating with total gate charges upto 10 µC
  • Source\sink current ratings of up to 15 Apk with external BJT buffer stage
  • IGBT short circuit protection using built-in DESAT and adjustable soft turn-off time
  • Built in common-mode choke and emitter resistance for limiting emitter loop current
  • 8000-Vpk VIOTM and 2121-Vpk VIORM reinforced isolation
  • Very high CMTI of 100 KV/us

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.

TIDUC70A.PDF (1952 K)

Reference design overview and verified performance test data

TIDRPJ3.PDF (637 K)

Detailed schematic diagram for design layout and components

TIDRPJ4.PDF (52 K)

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

TIDRPJ5.PDF (354 K)

Detailed overview of design layout for component placement

TIDRPJ7.ZIP (1077 K)

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

TIDCD36.ZIP (186 K)

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

TIDRPJ6.PDF (1776 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Isolated gate drivers

ISO5852S5.7kVrms, 2.5A/5A single-channel isolated gate driver w/ split output, STO & protection features

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Design guide IGBT Gate Driver Ref Design for Parallel IGBTs (Rev. A) Jan. 19, 2017

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