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


Design files


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  design operates at 420 kHz, which reduces the size of the isolation transformer, leading to a compact power supply. The module pinout matches our solar inverter platforms for testing, but can also be used as standalone drivers.

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

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.

TIDUB88A.PDF (3597 K)

Reference design overview and verified performance test data

TIDUCG2.PDF (3176 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement


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


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


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Isolated gate drivers

ISO54515.7kVrms, 2.5A/5A single-channel isolated gate driver with active protection features

Data sheet document-pdfAcrobat PDF open-in-new HTML
Buck converters (integrated switch)

TPS621433–17V 2A Step-Down Converter in 3x3 QFN package

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS706150-mA, ultra-low-IQ, low-dropout voltage regulator with reverse current protection & enable

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

SN6505BLow-noise, 1-A, 420-kHz transformer driver with soft start for isolated power supplies

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

Technical documentation

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Type Title Date
* Design guide Ref Design for Isolated Gate Driver With Active Miller Clamp for Solar Inverters (Rev. A) Sep. 28, 2017
More literature Fundamentals of MOSFET and IGBT Gate Driver Circuits (Replaces SLUP169) (Rev. A) Oct. 29, 2018
Design guide Compact, Half-Bridge, Reinforced Isolated Gate Drive Reference Design Dec. 08, 2016

Related design resources

Reference designs

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

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