enabling a new generation of high-speed chargers for power tools, e-bikes, and other devices, without the size, heat, and efficiency drawbacks of traditional topologies.
The expanded portfolio includes four integrated controller circuits based on Renesas' proprietary Zero Standby Power (ZSP) technology. At its core is the RRW11011, a combined interleaved power factor correction (PFC) and high-wire loose-cell (HWLLC) controller designed for high energy density and efficiency.
Phase-shift keying (PSC) reduces ripple, decreases component size and cost, balances current, and improves robustness. This controller enables lower operating temperatures and offers a wide output range (5V to 48V), necessary for USB Extended Power Range (EPR) and variable-charge systems. The solution also incorporates the RRW30120 USB Power Delivery (USB PD) protocol controller , which delivers up to 240W, along with the RRW40120 GaN half-bridge driver and the RRW43110 intelligent synchronous rectifier controller . Together, in a 240W USB EPR adapter design, they achieve an industry-leading power density (3W/cc) and a maximum efficiency of 96.5%.
The 500W power range expands the charging market to include large televisions, monitors, and higher-consumption devices such as vacuum cleaners, power tools, industrial lighting, and some medical equipment.
Furthermore, this technology facilitates the transition to 240W USB-C chargers, reducing the size of proprietary chargers for smartphones, laptops, and gaming systems. Renesas' GaN-based fast-charging technology has already been incorporated into a Belkin charger, the Z-Charger, which integrates a ZSP chip with SuperGaN® technology.
Jenny Ng, general manager of Belkin Asia, emphasized that this charger represents a step toward a new era of ultra-low standby power consumption.
GaN as a Key to Efficiency:
GaN technology drives efficiency and power density in next-generation AC/DC designs, enabling higher switching performance, lower energy loss, and improved thermal control.
Renesas' SuperGaN technology utilizes a more robust and easier-to-implement cascode configuration than other GaN solutions, offering compatibility with standard silicon drivers. This allows manufacturers to develop compact, efficient, and scalable power supplies more quickly.
According to Rohan Samsi, Vice President of Renesas' GaN division, this HWLLC ecosystem integrates interleaved PFC and resonant conversion into an optimized solution that improves density, reduces EMI, and increases operational efficiency.
Furthermore, by reducing components and eliminating transformer windings compared to traditional LLC implementations, it simplifies design, improves reliability, and facilitates BOM management, enabling more compact, efficient products that are compliant with energy regulations.
The four new devices that make the HWLLC solution possible are now available, along with an evaluation board. The EBC10293 evaluation board with USB PD and EPR features integrated PFC, high-efficiency AC/DC conversion, and USB PD control in a compact, high-power-density design.
