Isolated gate driver claims to be industry’s fastest

High-speed propagation delay, strong driver and universal compatibility are delivered with the UCC21520 reinforced isolated dual-channel driver.

Texas Instruments believes it has introduced the industry’s fastest 5.7kV RMS isolated dual-channel gate driver. It is the first of a new gate-driver family in its isolation portfolio. The 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. Integrated components, protection features and optimised switching performance enables designers to build smaller, more robust designs for enterprise, telecommunications, automotive and industrial applications, says the company.

It has been developed for high-voltage applications where system protection and reliability are critical. By delivering a propagation delay of 19ns and tight 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, says the company.

The 4A source and 6-A sink current of the driver reduce switching losses via faster rise times of 6ns and fall times of 7ns for a 1.8nF load in high-frequency switch-mode power applications.

Surge protection has been tested up to 12.8kV and noise immunity is greater than 100V/ns, the new gate driver helps protect end equipment from conditions commonly found in data centres, factories and other high-voltage environments.

The wide input voltage of 3.0 to 18V, programmable dead-time control, and dual channeling and paralleling of outputs, allow use in multiple applications.

Standby power is as low as 1mA per channel to increase energy efficiency.

The isolated gate driver can be coupled with a controller from the company to optimise their system performance. Analogue controllers include the UCC28950 for phase-shifted full bridge designs, the UCC25600 for resonant mode power supplies and the UCC28070 for power factor correction. The company’s digital power controllers include the UCD3138 and C2000 32bit microcontroller.

Support tools for the UCC21520 include the UCC21520EVM-286 evaluation module and PSpice/SIMPLIS transient models.

The isolated gate driver comes in a 16pin plastic small outline (SOIC16) wide-body package.


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