TIDA-00785

Isolated GaN Driver Reference Design

TIDA-00785

Design files

Overview

This reference design consists of a reinforced dualchannel digital isolator, a GaN gate driver, and isolated power supplies. This compact reference design is intended to control GaN in power supplies, DC-to-DC converters, synchronous rectification, solar inverters, and motor control. An open-loop push-pull topology based power supply for gate drivers provides flexibility in PCB routing. The pushpull transformer driver used in the TIDA-00785 operates at 300 kHz, which helps in reducing the size of the isolation transformer, leading to a compact power supply solution.

Features
  • Suited for Low-Voltage GaN Drives (300 to 450 V)\
  • Rail-to-Rail Peak Current Drive Capability With 4-A Source and 6-A Current Suits Driving GaN Modules
  • 5000-Vpk Reinforced Isolation and Very High CMTI of > 100 kV/us
  • Spread Spectrum Operation of Transformer Driver Helps Reduce Emissions
  • PWM Signals of Gate Drivers can be Directly Interfaced to a Controller (3.3-V Operation)

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.

TIDUBI7.PDF (2363 K)

Reference design overview and verified performance test data

TIDRL42.PDF (170 K)

Detailed schematic diagram for design layout and components

TIDRL43.PDF (21 K)

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

TIDRL44.PDF (108 K)

Detailed overview of design layout for component placement

TIDRL47.ZIP (445 K)

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

TIDCC10.ZIP (227 K)

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

TIDRL46.PDF (593 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Digital isolators

ISO7821Highest isolation rating, dual-channel, 1/1, reinforced digital isolator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Low-side drivers

UCC276114-A/6-A single-channel gate driver with 4-V UVLO and 5-V regulated output

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

SN6501Low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies

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

Technical documentation

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Type Title Date
* Design guide Isolated GaN Driver Design Guide Mar. 28, 2016
Technical article How to achieve higher system efficiency- part two: high-speed gate drivers Jan. 31, 2017
White paper Driving the green revolution in transportation Sep. 23, 2016

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