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Startup shows integrated GaN half-bridge power controller  

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By Nick Flaherty


Wise-integration in France has launched its first commercial product, a 650V chip that integrates enhancement mode power transistors and control logic on a GaN-on-silicon substrate  in a 6 x 8mm package.

The JEDEC-certified WI62120 is a 120mOhm half-bridge integrated circuit for AC-DC, DC-DC and DC-AC designs from 30W to 3kW. This combines a GaN component and the AC-DC half bridge with software for charger designs that are three times smaller, three times more efficient and three times lighter from 30W to 3kW.

The chip has 0V to 6V standard gate drive requirements with a -20V / 10V transient tolerant gate drive and > 1 MHz switching frequency. The logic provides controllable fall time and rise time with an integrated source sense, reverse current capability and zero reverse recovery losses

Target market sectors include consumer (such as ultra-fast chargers for mobile and desktop devices), E-mobility, and industrial AC-DC power supplies and designs utilizing Bridgeless Totem Pole power factor conversion (PFC) active clamp flyback (ACF), two-inductor one-capacitor (LLC) resonant converters, and synchronous buck or boost half-bridge topologies.

“We are proud to bring our first WiseGan product release into production,” said Thierry Bouchet, CEO of Wise-integration, which was founded in Hyères, France in 2020. “The 120 mOhm WI62120 is the most compact half bridge in the market with a 6×8 PQFN package that maximizes customer benefits in terms of high power density, performance, and bill of materials cost reduction. We’re confident that our customers will find it very useful in all ACF topologies and PFC-LCC architectures, and that it will help them leverage the benefits provided by smaller, more-efficient, and more cost-effective power electronics.”

Wise-integration has developed embedded digital control software called WiseWare that runs on the chip.

Subsequent generations of WiseGan devices will integrate functions such as gate control, protection, security, and other designer-friendly capabilities into AC-DC GaN applications.

www.wise-integration.com

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