Texas Instruments Announces Isolated Dual-Channel Gate Driver for Automotive

Texas Instruments UCC21320-Q1

Texas Instruments introduced an isolated dual-channel gate drivers, UCC21320-Q1, with 4-A source and 6-A sink peak current. It is designed to drive power MOSFETs, IGBTs, and SiC MOSFETs up to 5-MHz with best-in-class propagation delay and pulse-width distortion.

Texas Instruments - UCC21320-Q1

The input side is isolated from the two output drivers by a 3.75-kVRMS basic isolation barrier, with a minimum of 100-V/ns common-mode transient immunity (CMTI). Internal functional isolation between the two secondary-side drivers allows a working voltage of up to 1500 VDC.

Functional Block Diagram
Functional Block Diagram.

Every driver can be configured as two low-side drivers, two high-side drivers, or a half-bridge driver with programmable dead time (DT). A disable pin shuts down both outputs simultaneously, and allows normal operation when left open or grounded. As a fail-safe measure, primary-side logic failures force both outputs low.

Each device accepts VDD supply voltages up to 25 V. A wide input VCCI range from 3 V to 18 V makes the driver suitable for interfacing with both analog and digital controllers. All supply voltage pins have under voltage lock-out (UVLO) protection.

With all these advanced features, the UCC21320-Q1 enables high efficiency, high power density, and robustness.

Bench Test Waveform for INA/B and OUTA/B
Bench Test Waveform for INA/B and OUTA/B.


  • 4-A peak source, 6-A peak sink output
  • 3-V to 18-V input VCCI range to interface with both digital and analog controllers
  • Up to 25-V VDD output drive supply
  • Switching parameters:
    • 19-ns typical propagation delay
    • 10-ns minimum pulse width
    • 5-ns maximum delay matching
    • 6-ns maximum pulse-width distortion
  • Common-mode transient immunity (CMTI) greater than 100 V/ns
  • Universal: dual low-side, dual high-side or half-bridge driver
  • Programmable overlap and dead time
  • Wide Body SOIC-14 (DWK) Package
    • 3.3 mm spacing between driver channels
  • Operating temperature range –40 to +125 °C
  • Surge immunity up to 12.8 kV
  • Isolation barrier life >40 years
  • TTL and CMOS compatible inputs
  • Rejects input pulses and noise transients shorter than 5 ns
  • Fast disable for power sequencing
  • Qualified for automotive applications


  • HEV and BEV battery chargers
  • Isolated converters in DC-DC and AC-DC power supplies
  • Motor drive and DC-to-AC solar inverters
  • Uninterruptible power supply (UPS)
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