A new single-stage, independently regulated multi-output offline power supply integrated circuit (IC) was released by Power Integrations as part of its InnoMux-2 series. The new device uses the company’s proprietary PowiGaN technology to build the first 1700 V GaN switch in the industry.
Power Integrations’ own 900 V and 1250 V devices, which were both introduced in 2023, had previously set the state-of-the-art for GaN power devices; the 1700 V GaN rating further raises that standard.
In applications that require one, two, or three supply voltages, the 1700 V InnoMux-2 IC is said to achieve over 90% efficiency and readily supports a flyback configuration with a nominal input voltage of 1000 VDC. By eliminating post regulators and regulating each output with an accuracy of 1%, system efficiency is further increased by about 10%.
In power supply applications including solar inverters, three-phase meters, vehicle chargers, and a wide range of industrial power systems, the novel technology takes the place of costly silicon carbide (SiC) transistors.
Key Comments
Radu Barsan, vice president of technology at Power Integrations, said, “Our rapid pace of GaN development has delivered three world-first voltage ratings in a span of less than two years: 900 V, 1250 V and now 1700 V. Our new InnoMux-2 ICs combine 1700 V GaN and three other recent innovations: independent, accurate, multi-output regulation; FluxLink™, our secondary-side regulation (SSR) digital isolation communications technology; and zero voltage switching (ZVS) without an active-clamp, which all but eliminates switching losses.”
“1700 V rating is substantially higher than any other commercially available GaN HEMT that we are aware of,” said Ezgi Dogmus, activity manager, compound semiconductors at Yole Group. “The Power GaN device market is poised to reach $2 billion by decade’s end, expanding across various application spaces with potentially attractive cost advantages over SiC.”
Availability & Resources
Pricing for InnoMux-2 1700 V ICs starts at $4.90 for 10,000-unit quantities. A reference design, RDR-1053, which describes a 60 W dual-output (5 V and 24 V) power supply, can be downloaded from the Power Integrations website at no cost.
