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Arrow Electronics, working with franchised suppliers Nexperia and Yageo, has completed an AC/DC power supply (PSU) reference design to unleash gallium nitride (GaN) efficiency and power-density advantages in applications up to 4-kW. The reference design is available with complete supporting documentation including bill of materials.

Customers can integrate the new GaN-based PSU directly in their own products and are free to modify if needed. Typical applications include solar and wind energy conversion, industrial robots, HVAC equipment, fluid pumps, ATM machines, and general industrial automation and power supplies, including UPS. With its compact form factor, it is also ideal for e-bikes, power tools, and professional audio equipment.

The three companies combined their design resources to conceptualise the reference design and develop the schematic, with selected components from Nexperia and Yageo.

“Our 4-kW reference design is at the forefront of the current trend to adopt GaN wide-bandgap transistors in applications above 1-kW,” said Vitali Damasevich, director engineering – Eastern Europe and engineering solutions center, EMEA, Arrow Electronics. “By leveraging the latest GaN FETs and customized passive components, we have achieved a significant increase in efficiency, power density, and device miniaturization over traditional silicon-MOSFET-based solutions. In addition to supplying the reference design, we can also help customers to develop their own highly efficient PSUs, as well as integrate the solution in their applications for optimal form, fit, and function.”

To realise the advanced PSU design, Arrow’s team chose the latest GAN039-650NTB GaN power transistors from Nexperia and worked with Yageo to develop specifications for the flyback transformer and resonant-circuit inductor. The GAN039-650NTB power GaN FET has cutting-edge device parameters, including fast and tightly controlled turn-on/turn-off times and low RDS(on). It is housed in a thermally efficient copper-clip SMD package with top-side cooling that ensures high reliability and low operating temperatures with simplified thermal management.

The flyback transformer from Yageo is a custom design with two isolated outputs that provides auxiliary supplies for the PSU control ICs and gate drivers in a small form factor. Similarly, the LLC inductor is specially designed. It has 500kHz working frequency with 48V operating voltage and 80A current rating.

Samples will be available during the second half of 2023.

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