Automotive Dual Channel SiC MOSFET Gate Driver Reference Design with Two Level Turn-off Protection
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Key Document


This reference design is an automotive qualified isolated gate driver solution for driving Silicon Carbide (SiC) MOSFETs in half bridge configuration. The design includes two push pull bias supplies for the dual channel isolated gate driver respectively and each supply provides +15V and -4V output voltage and 1W output power. The gate driver is capable of delivering 4A source and 6A sink peak current. It implements reinforced isolation and can withstand 8kV Peak and 5.7kV RMS isolation voltage and >100V/ns common mode transient immunity (CMTI). The reference design contains the two-level turn-off circuit which protects the MOSFET from voltage overshoot during the short circuit scenario. The DESAT detection threshold and the delay time for second stage turn-off are configurable. The ISO7721-Q1 digital isolator is implemented for interfacing the signals of fault and reset. All designed on a two layer PCB board with a compact form factor of 40mm × 40mm.

  • Compact, dual-channel, gate-driver solution for driving SiC MOSFETs in half bridge configuration
  • 4-A source and 6-V sink peak current driving capability suitable for driving SiC MOSFET, Si MOSFET, and IGBT with switching frequency up to 500 kHz
  • Built-in, compact, high-efficiency, isolated-bias supply, with 15V and –4V outputs
  • Discrete, two-level turn-off for short-circuit protection, with adjustable current limit and delay (blanking) time
  • Provides high CMTI of > 100 V/ns and reinforced isolation of 8-kV peak and 5.7-kV RMS voltages

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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 (7)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD17313Q2  30-V, N channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 32 mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
ISO7721-Q1  Automotive, robust EMC, dual-channel, 1/1, reinforced digital isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
LMV762Q-Q1  Low Voltage, Precision Comparator with Push-Pull Output  Amplifiers  Sample & Buy Not Available
SN6501-Q1  Automotive low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies  Power for signal isolators  Sample & Buy View Design Kits & Evaluation Modules
TL431-Q1  Automotive adjustable precision shunt regulator (pin layout: KRA)  Voltage references  Sample & Buy Not Available
TPS7B69-Q1  Automotive 150-mA, off-battery (40-V), high-PSRR, low-IQ, low-dropout voltage regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
UCC21530-Q1  Automotive, 4-A, 6-A, 5.7-kVrms isolated dual-channel gate driver with enable ;  Gate drivers  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD17313Q2 WSON (DQK)| 6 Download -
ISO7721-Q1 Download Download
LMV762Q-Q1 Download
SN6501-Q1 Download
TL431-Q1 Download
TPS7B69-Q1 Download
Download -
UCC21530-Q1 Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 5380 03 Jun 2020
White paper (1)
Title Type Size (KB) Date
PDF 1890 16 Oct 2014
Design files (6)
Title Type Size (KB) Date
PDF 6671 01 Jul 2019
PDF 1731 01 Jul 2019
PDF 214 01 Jul 2019
ZIP 295 01 Jul 2019
PDF 55 01 Jul 2019
ZIP 789 01 Jul 2019
Related Tools & Software

Reference Designs (1)

Name Part Number Tool Type
98.6% Efficiency, 6.6-kW Totem-Pole PFC Reference Design for HEV/EV Onboard Charger  TIDA-01604  Reference design 

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