Eggtronic unveils 140W USB-C power design with Renesas GaN

Eggtronic has launched a 140W USB-C Power Delivery AC/DC reference platform for premium laptops and other high-performance devices, built with Renesas high-voltage GaN transistors. The company says the design reaches nearly 96% efficiency while keeping costs at QR flyback levels, aiming to speed up development of smaller, more efficient chargers.

Why it matters: - The reference platform targets the next wave of compact USB-C laptop chargers, where OEMs are under pressure to cut heat, size and energy loss without raising costs. - Eggtronic says the design can help adapter makers reach DOE Level VII efficiency requirements while keeping a bill of materials closer to a traditional QR flyback converter. - The platform is meant to give manufacturers a faster path to premium 140W USB-C charging designs.

What happened: - Eggtronic announced a 140W USB-C Power Delivery AC/DC reference platform on September 14, 2026. - The design is based on Renesas’ high-voltage GaN transistors, including the TP70H150G4LSG, a 700V device with 150 mΩ RDS(on). - The reference board is available now for high-performance notebook adapters and other USB-C powered devices.

The details: - Eggtronic paired its EPIC™ combo controller with Renesas GaN technology in the new platform. - The company says the design approaches 96% efficiency. - The platform delivers 94.5% efficiency at 90 VAC input, according to Eggtronic. - The design is built to perform well at light load, which matters for standby and partial-use power consumption. - Eggtronic says the architecture keeps the bill of materials cost in line with a traditional QR flyback converter. - The platform avoids more complex and costly LLC, Asymmetrical Half-Bridge and Active Clamp Flyback topologies. - The EPIC™ combo controller integrates Totem Pole Power Factor Correction, isolated primary-side regulation, synchronous rectification, proprietary ultra-low-latency isolated communication and USB Power Delivery protocol management. - The Totem Pole PFC is designed to improve EMI performance and light-load efficiency. - The PFC stage feeds Eggtronic’s QuarEgg™ regenerative flyback architecture. - Eggtronic says QuarEgg uses a single primary-side switch to deliver higher efficiency and lower system cost than LLC, AHB and ACF converters while keeping QR flyback simplicity. - The platform is intended for next-generation premium laptops and high-performance devices.

Between the lines: - Eggtronic is positioning digital control and GaN as a way to break the usual tradeoff between efficiency and cost in high-power USB-C chargers. - The reference design suggests OEMs may be able to simplify charger architecture instead of moving to more complex topologies to chase higher performance. - Renesas gains a visible design win in a fast-growing power segment, while Eggtronic reinforces its strategy around integrated power-conversion controllers.

What's next: - Eggtronic expects the reference board to accelerate development of high-performance notebook adapters and other USB-C charging products. - OEMs can use the platform as a starting point for next-generation premium power adapters. - The company and Renesas are likely to use the collaboration to push more compact, lower-cost high-efficiency power designs.

The bottom line: - Eggtronic is betting that a GaN-based reference design can deliver charger-level efficiency near 96% without the cost penalty of more complex power topologies.