Power Integrations has released what is said to be the world’s highest-voltage, single-switch gallium-nitride (GaN) power supply IC, featuring a 1.25kV PowiGaN switch. The InnoSwitch3-EP 1250V ICs are the newest members of Power Integrations’ InnoSwitch family of off-line CV/CC QR flyback switcher ICs, which feature synchronous rectification, FluxLink safety-isolated feedback and an array of switch options: 725V silicon, 1.7kV silicon carbide, and PowiGaN in 750V, 900V and now 1.25kV varieties.

The switching losses for Power Integrations’ proprietary 1.25kV PowiGaN technology are less than a third of that seen in equivalent silicon devices at the same voltage. This results in power conversion efficiency as high as 93 percent – enabling highly compact flyback power supplies that can deliver up to 85W without a heatsink.

“Power Integrations continues to advance the state of the art in high-voltage GaN technology development and commercial deployment, rendering even the best high-voltage silicon MOSFETs obsolete along the way. We were first to market with high-volume shipments of GaN-based power-supply ICs in 2019, and earlier this year introduced a 900-volt version of our GaN-based InnoSwitch products. Our ongoing development of higher voltage GaN technology, illustrated here by our new 1250 V devices, extends the efficiency benefits of GaN to an even wider range of applications, including many currently served by silicon-carbide technology,” said Radu Barsan, vice president of technology at Power Integrations.

Designers using the new InnoSwitch3-EP 1250V ICs can confidently specify an operating peak voltage of 1000 V, which allows for industry-standard 80 percent de-rating from the 1.25kV absolute maximum. This provides significant headroom for industrial applications and is particularly valuable in challenging power grid environments where robustness is an essential defense against grid instability, surge and other power perturbations.

By: DocMemory
Copyright © 2023 CST, Inc. All Rights Reserved