Texas Instruments Announces Isolated Dual-Channel Gate Driver for Automotive

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.

The input side is isolated from the two output drivers by a 3.75-kV_RMS 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.

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.

Features

• 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

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)