Isolated GaN Driver Reference Design
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Key Document


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.

  • 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)

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Schematic/Block Diagram

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Design Files

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TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ISO7821  Highest isolation rating, dual-channel, 1/1, reinforced digital isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
SN6501  Low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies  Isolation  Sample & Buy View Design Kits & Evaluation Modules
UCC27611  4-A/6-A single-channel gate driver with 4-V UVLO and 5-V regulated output  Gate drivers  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ISO7821 Download Download
SN6501 Download Download
UCC27611 Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 2363 28 Mar 2016
White papers (1)
Title Type Size (KB) Date
PDF 586 23 Sep 2016
Design files (6)
Title Type Size (KB) Date
ZIP 227 31 Mar 2016
ZIP 445 31 Mar 2016
PDF 593 31 Mar 2016
PDF 108 31 Mar 2016
PDF 21 31 Mar 2016
PDF 170 31 Mar 2016

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