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

(ACTIVE) TIDA-01605

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Key Document

Description

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.

Features
  • 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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Bill of Materials (BOM)

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TI Devices (7)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD17313Q2  30V N Channel NexFET™ Power MOSFET  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
ISO7721-Q1  Automotive, High Speed, Robust EMC Reinforced Dual-Channel 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   Isolation  Sample & Buy View Design Kits & Evaluation Modules
TL431A-Q1  Automotive Adjustable Precision Shunt Regulator  Voltage references  Sample & Buy Not Available
TPS7B69-Q1  Automotive High-Voltage Ultra-Low-Iq Low-Dropout Regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
UCC21520-Q1  Automotive 4A/6A, 5.7 kVrms Isolated Dual Channel Gate Driver  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
Download
LMV762Q-Q1 Download
Download
SN6501-Q1 Download
TL431A-Q1 Download Download
Download Download
TPS7B69-Q1 Download
Download -
UCC21520-Q1 Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 1876 01 Feb 2018 148
White papers (1)
Title Abstract Type Size (KB) Date Views
PDF 1377 16 Oct 2014 505
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 292 01 Mar 2018 29
ZIP 764 01 Mar 2018 50
PDF 656 01 Mar 2018 29
PDF 166 01 Mar 2018 28
PDF 58 01 Mar 2018 43
PDF 213 01 Mar 2018 171
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Reference Designs  ( 1 )


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