Reference Design for Isolated Gate Driver Power Stage with Active Miller Clamp for Solar Inverters
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Key Document


This reference design consists of a single module with a reinforced, isolated IGBT gate driver with a dedicated gate drive power supply. This compact reference design controls IGBTs in solar inverters.  The design uses a reinforced isolated IGBT gate driver with built-in IGBT DESAT detection and Miller clamp protection, enabling a unipolar supply voltage for the gate drive. Open-loop, push-pull topology-based power supply for each gate driver provides flexibility in PCB routing. The push-pull transformer driver used in this TI Design operates at 420 kHz, which reduces the size of the isolation transformer, leading to a compact power supply solution. The module pinout matches TI’s solar inverter platforms for testing, but can also be used as standalone drivers.

  • Suited for low to medium voltage inverters (400V AC and 690V AC)
  • Integrated 2.5A source and 5A sink current suits driving IGBT modules with currents up to 50A
  • Built-in Miller clamp functionality enables use of unipolar supply voltage (17V) for driving IGBT
  • 8000-VPK reinforced isolation
  • Very High CMTI of >100 kV/us
  • Spread spectrum operation of transformer driver helps reduce EMI emissions

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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ISO5451  2.5-A / 5-A, 5.7-kV RMS single channel isolated gate driver with protection features  Gate drivers  Sample & Buy View Design Kits & Evaluation Modules
SN6505B  Low-noise, 1-A, 420-kHz transformer driver with soft start for isolated power supplies  Power for signal isolators  Sample & Buy View Design Kits & Evaluation Modules
TPS62143  3–17V 2A Step-Down Converter in 3x3 QFN package  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS706  150-mA, ultra-low-IQ, low-dropout voltage regulator with reverse current protection & enable  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ISO5451 Download Download
SN6505B Download Download
TPS62143 Download Download
TPS706 Download Download
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Technical documentation

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Data sheet (1)
Title Type Size (KB) Date
PDF 1478 16 Jan 2017
User guide (2)
Title Type Size (KB) Date
PDF 3597 28 Sep 2017
PDF 3176 08 Dec 2016
Design files (6)
Title Type Size (KB) Date
PDF 133 28 Sep 2017
PDF 401 28 Sep 2017
ZIP 223 28 Sep 2017
ZIP 487 28 Sep 2017
PDF 54 28 Sep 2017
PDF 264 28 Sep 2017
More literature (1)
Title Type Size (KB) Date
PDF 727 29 Oct 2018
Related Tools & Software

Reference Designs (2)

Name Part Number Tool Type
C2000™ Solar DC/AC Single Phase Inverter  TIDM-SOLAR-ONEPHINV  Reference design 
Isolated IGBT Gate Driver Evaluation Platform for 3-Phase Inverter System Reference Design  TIDA-00195  Reference design 

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