Innoscience unveils 140W power supply design using high and low voltage GaN switches to deliver power density and efficiency
22 March, 2022 – Innoscience Technology, the company founded to create a global energy ecosystem based on high performance, low cost gallium nitride on silicon (GaN-on-Si) power solutions, announced a new ultra high density 140W power supply demo that uses the company’s high and low voltage GaN HEMT devices to achieve efficiencies of over 95% (230VAC; 5V/28A). Measuring just 60x60x22mm (2.4×2.4×0.9in) the PSU has a power density of 1.76W/cm3 (29W/in3).
Denis Marcon, general manager of Innoscience europe and marketing manager for the USA and Europe, explains, “By using GaN switches for both the high and low voltage functions on this design, we are maximising efficiency rather than compromising it with lossy silicon devices. This is possible thanks to Innoscience’s cost effective and high volume manufacturing processes and capabilities.”
The 140W 300kHz AC/DC adapter uses a CRM Totem Pole PFC + AHB topology. It features Innoscience’s INN650DA140A, a 650V /140mΩ GaN HEMT in the 5x6mm DFN package, for switches S1 and S2, the 650V/240mΩ, 8x8mm DFN-packaged INN650D240A for S3, and the INN650DA240A, a 5x6mm DFN 650V/240mΩ device for S4. S5 and S6 are delivered by the INN150LA070A, a 150V/7mΩ, 2.2×3.2mm LGA part within Innoscience’s low-voltage GaN HEMT range.
Yi Sun, general manager of Innoscience America and senior vice president of product and engineering adds, “This design, which targets USB PD3.1 notebooks and power tools, is a full 2% more efficient than silicon designs; this proves what can be achieved if GaN FETs are used everywhere, even in a relatively simple design.”
Founded in December 2015, Innoscience is the IDM company in the world that can mass produce both high and low voltage GaN devices. Innoscience has its own normally-off, single-die technology and has industry’s largest 8in wafer GaN on Si production capacity. In the consumer market, fast charging products have led the adoption of GaN technology. Today, many other markets are also starting to use GaN, accelerating Innoscience’s growth.
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