The industry’s fastest 600V half-bridge gate driver

29th September 2015
Nat Bowers

Claimed to be the industry’s fastest half-bridge gate driver for discrete power MOSFETs and IGBTs that operate up to 600V, the UCC27714 has been introduced by Texas Instruments. The device delivers 90ns propagation delay (40% lower than existing silicon solutions), tight control of the propagation delay with a maximum of 125ns and tight channel-to-channel delay matching of 20ns.

The UCC27714 high-side, low-side driver with 4A source and 4A sink current capability reduces component footprint by 50%, enabling higher power density in high-frequency, offline AC/DC power supplies used in server, telecomms and industrial designs including UPSs. The device’s high-current capability enables MOSFETs to drive over a wide power range, from a few watts to a kilowatt. Negative voltage handling of -6V at the switched-node pin creates the ability to tolerate noise, causing virtually no malfunctions in the electronic system.

The device eliminates the need for bulky gate drive transformers, saving significant board space in high-frequency switch-mode power electronics. All electrical characterisations have little variations across operating temperatures, creating a simplified design and speeding time-to-market.

Every gate driver in a system requires the appropriate controller for the end application. TI offers several PWM, resonant, PFC and digital power controllers. With the UCC27714 and TI’s recently released UCC29950 combination PFC + LLC controller, designers can develop a complete, offline AC/DC power supply rated up to a few hundred watts. The fully internalised PFC compensation of UCC29950 reduces design steps enabling fast time-to-market while the three-level over current protection and hiccup mode operation ensures a robust operation under short circuits and overload conditions.

The UCC27714 is now available in the TI store and through the company’s authorised distribution network. The high-speed 600V high-side low-side gate driver comes in an SOIC-14 package and is priced at $1.75 in 1,000 unit quantities.

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