Small Form-Factor Reinforced Isolated IGBT Gate Drive Reference Design for 3 Phase Inverter
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Key Document


The TIDA-00446 reference design consists of six reinforced isolated IGBT gate drivers along with dedicated gate drive power supplies. This compact reference design is intended to control IGBT’s in 3-phase inverters like AC drives, uninterruptible power supplies (UPS) and solar inverters. The design uses a reinforced isolated IGBT gate driver with DESAT feature and built-in miller clamp protection, enabling use of 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 TIDA-00446 operates at 420 khz which helps in reducing the size of the isolation transformer leading to compact power supply solution. Gate drive power supply can be disabled to facilitate safe torque off (STO).

  • Suited for low voltage drives (400 Vac and 690 Vac)
  • 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 (+17 V) for driving IGBT
  • Built in protection functionalities
    • Short circuit protection through DESAT detection
    • Supply Undervoltage protection
  • Provision for separate Rg(ON) and Rg(OFF)
  • 8000 Vpk Reinforced Isolation
  • Very high CMTI of > 100 kV/us
  • Spread spectrum operation of transformer driver helps reduce EMI.
  • PWM and fault signals of gate drivers can be directly interfaced to controller (3.3V operation)

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TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ISO5851  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  Isolation  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)
ISO5851 Download Download
SN6505B Download Download
TPS706 Download Download
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Technical documentation

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Application notes (1)
Title Type Size (KB) Date
PDF 51 19 Sep 2017
User guides (1)
Title Type Size (KB) Date
PDF 4440 23 Jun 2017
White papers (1)
Title Type Size (KB) Date
PDF 1890 16 Oct 2014
Design files (6)
Title Type Size (KB) Date
ZIP 354 29 Oct 2015
ZIP 1917 29 Oct 2015
PDF 2970 29 Oct 2015
ZIP 196 29 Oct 2015
PDF 23 29 Oct 2015
PDF 1110 29 Oct 2015
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Reference Designs (3)

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