5.7-kVrms Isolated High-Frequency Gate Driver

Texas Instruments (TI) today introduced what is claimed to be the industry's fastest 5.7-kVrms isolated dual-channel gate driver, the first of a new gate driver family in 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 for enterprise, telecommunications, automotive and industrial applications.

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 12.8kV, along with common-mode transient immunity greater than 100 V/ns. By delivering the industry’s fastest propagation delay of 19ns and the tightest channel-to-channel delay matching of less than 5ns, the device enables high power density and efficiency, resulting in smaller solution size and reliable operation over end equipment lifetimes.

Key features and benefits of the UCC21520: Higher power density for smaller solutions: The 4-A source and 6-A sink current of the UCC21520 reduce switching losses via faster rise times of 6ns and fall times of 7ns for a 1.8-nF load in high-frequency switch-mode power applications. Isolation robustness: With its surge protection that has been tested up to 12.8kV and its noise immunity of greater than 100 V/ns, the new gate driver helps protect end equipment from conditions commonly found in data centers, factories and other high-voltage environments. Flexibility: With a wide input voltage of 3V to 18V, programmable dead-time control, and dual channeling and paralleling of outputs, the UCC21520 gives designers a single, flexible device for multiple applications. Low power consumption: The device’s standby power, as low as 1mA per channel, helps increase energy efficiency.

TI offers a broad range of support tools for the UCC21520 to speed engineers’ time to market. Get started now using 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).

The UCC21520 is now available in the TI store and through the company’s authorized distribution network. The isolated gate driver comes in a 16-pin plastic small outline (SOIC16) wide-body package and is priced at US$2.40 in 1,000 unit-quantities.