TIDA-020015

4.5-V to 65-V input, compact bias supply with power stage reference design for IGBT/SiC gate drivers

TIDA-020015

Design files

Overview

This reference design is a 4.2-W, single-channel, automotive 12-V battery input flyback bias supply for IGBT/SiC isolated gate drivers. The supply accepts a wide input range of 4.5-V to 65-V DC. The output is configurable as +15 V,–8 V or +20 V, –4 V at loads up to 180 mA for driving the IGBT/SiC MOSFET power modules. The system consists of reverse polarity protection, electric transients clamping, and overvoltage and undervoltage protection circuits. The flyback controller implements primary-side regulation with better than ±1% load and line regulation performance. The power stage design includes the dual-channel isolated gate drivers with 5.7-kVRMS reinforced isolation and designed in compact form factor of 100 mm × 62 mm. It includes isolated DC bus sensing, isolated temp sensing, logic shoot-through protection and diagnostic features.

Features
  • Wide-VIN flyback converter over the input voltage of 4.5-V to 65-V DC
  • Protection for clamping high voltage conducted transients to safe levels for downstream circuitry
  • Programmable overvoltage and undervoltage protection on supply output
  • Primary side regulation with no optocoupler for extended life time and small form factor
  • Power stage design includes dual channel isolated gate driver, DC bus sensing, and temp sensing for high voltage testing

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.

TIDUEO8.PDF (3063 K)

Reference design overview and verified performance test data

TIDRZG1.PDF (177 K)

Detailed schematic diagram for design layout and components

TIDRZG2.PDF (53 K)

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

TIDRZG3.PDF (143 K)

Detailed overview of design layout for component placement

TIDRZG0.ZIP (2645 K)

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

TIDRZG5.ZIP (709 K)

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

TIDCFE7.ZIP (390 K)

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

TIDRZG4.PDF (615 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Ideal diode/ORing controllers

LM74700-Q13.2-V to 65-V, 80-uA IQ automotive ideal diode controller

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated DC/DC converters & modules

LM5180-Q1Automotive 65-VIN no-opto flyback converter with 100-V, 1.5-A integrated MOSFET

Data sheet document-pdfAcrobat PDF open-in-new HTML
Supervisor & reset ICs

TPS3700-Q1Automotive high-voltage (18-V) window voltage detector for overvoltage and undervoltage monitoring

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

Technical documentation

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Type Title Date
* Design guide 4.5-V to 65-V Input, Compact Bias Supply W/ Power Stage Ref. Des. for IGBT/SiC Apr. 03, 2019

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