High-speed, high-voltage isolated gate driver

July 20, 2016 // By Graham Prophet
Texas Instruments’ reinforced isolated dual-channel driver has been designed to provide high-speed propagation delay, strong drive and universal compatibility TI presents it as the fastest-available, 5.7-kVRMS isolated dual-channel gate driver.

The first of a gate-driver family added to TI’s isolation portfolio, the UCC21520’s flexible, universal compatibility enables its use as an isolated driver in low-side, high-side, high-side/low-side or half-bridge power management designs. With its integrated components, advanced protection features and optimized switching performance, the UCC21520 enables designers to build smaller, more robust designs.

Developed for high-voltage applications where system protection and reliability are critical, the UCC21520 provides reinforced isolation of 5.7 kVRMS and surge immunity tested up to 12.8 kV, along with common-mode transient immunity greater than 100 V/nsec. With propagation delay of 19 nsec and channel-to-channel delay matching of less than 5 nsec, the device enables high power density and efficiency.

Other features include;

  • 4-A source and 6-A sink current reduce switching losses via faster rise times of 6 ns and fall times of 7 ns for a 1.8-nF load in high-frequency switch-mode power applications.
  • With a wide input voltage of 3 to 18V, programmable dead-time control, and dual channelling and paralleling of outputs, the UCC21520 gives designers a single, flexible device for multiple applications.
  • Standby power down to 1 mA per channel.

Support includes the UCC21520EVM-286 evaluation module and PSpice/SIMPLIS transient models. Review the block diagram, design files and bill of materials for the TI Designs Reference Design for Reinforced Isolation 3-Phase Inverter with Current, Voltage and Temp Protection (TIDA-00366).

In a 16-pin plastic small outline (SOIC16) wide-body package the part is priced at $2.40 (1,000).

TI; www.ti.com/UCC21520-pr-eu