TOKYO, Japan, Mar 24, 2026 – Renesas Electronics expanded its AC/DC and power adapter portfolio with a GaN-based Half-Wave LLC (HWLLC) platform for 500W or higher operation across IoT, industrial, and infrastructure systems. The HWLLC converter topology scales a compact power design from 100W-class systems to 500W and supports high-speed chargers for power tools, e-bikes, and other appliances.
Renesas includes four controller ICs in its portfolio based on zero-standby power (ZSP) technology. The RRW11011 combines interleaved power factor correction (PFC) and HWLLC control, using phase-shift operation to reduce ripple, balance current, and lower component count. The controller supports output range (5V to 48V), meeting requirements for USB Extended Power Range (EPR) and variable-load charging systems.
The platform also integrates the RRW30120 USB Power Delivery (USB PD) and closed-loop controller, along with the RRW40120 half-bridge GaN gate driver and RRW43110 synchronous rectifier controller. In a 240W USB EPR adapter configuration, the design delivers a power density of 3W/cc and 96.5% peak efficiency.
The HWLLC’s 500W power envelope expands charging applications to include TVs, monitors, and appliances such as vacuums, power tools, outdoor lighting, and medical devices. The HWLLC-based AC/DC topology supports a shift from 100W USB-C devices to 240W USB Extended Power Range (EPR) charging, enabling smaller power adapters for smartphones, laptops, and gaming systems. Renesas technology is also used in a GaN-based charger from Belkin. The Belkin Z-charger includes a ZSP chip based on Renesas SuperGaN depletion-mode technology.
“The Belkin Z-Charger is a major step toward a new era of ultra-low standby power consumption in fast charging,” said Jenny Ng, general manager of Belkin Asia.
GaN Proves Essential for Increasing Efficiency and Power Density
GaN technology enables higher switching performance in Renesas’ AC/DC designs, reducing magnetics size, lowering losses, and improving thermal performance. Renesas’ SuperGaN depletion-mode technology uses a cascode configuration with higher threshold voltage and compatibility with standard silicon gate drivers. This design supports integration into power supply designs and enables development of power systems for production.
“Renesas’ HWLLC ecosystem brings interleaved PFC and resonant power conversion into a single, harmonized solution that delivers ultra-compact, wide-range AC/DC power with proven efficiency, low standby consumption and trusted integration support,” said Rohan Samsi, vice president, GaN business division at Renesas. “By strategically developing four advanced controller ICs, we’ve created the most optimized, coordinated ecosystem where each element contributes to higher density, improved thermals, reduced EMI/noise and greater operating efficiency.”
The HWLLC-based AC/DC solution reduces component count and eliminates transformer winding compared with conventional LLC designs, enabling simpler layouts and compact magnetics. It allows reuse across product families with varying wattages, voltages, and form factors while supporting consistent design and streamlined BoM management. The wide wide Vin/Vout offline architecture supports lower thermal load and compliance with energy-efficiency requirements, including no-load/standby performance targets.
Renesas will showcase the HWLLC solution at Applied Power Electronics Conference (booth 1219) in San Antonio, Texas, March 22 to 25, 2026.
Availability
The four devices supporting the HWLLC solution are available with an evaluation board. The EBC10293 240W USB PD EPR Board integrates PFC, AC/DC conversion, and USB Power Delivery control.
Winning Combinations
Renesas provides 240W AC/DC adapter and 300W lighting power platform that combine the new devices with compatible components from its portfolio. Its Winning Combinations define pre-validated system architectures using compatible devices from the Renesas portfolio. The company lists more than 400 such configurations to support system design and development.
Source: Renesas Electronics
About Renesas Electronics
Renesas Electronics is a semiconductor manufacturer that develops and supplies microcontrollers, analog devices, power semiconductors, system-on-chip products, and connectivity components used in embedded systems. The company provides semiconductor devices and related software for automotive systems, industrial equipment, infrastructure, consumer electronics, and IoT applications. Renesas serves automotive suppliers, electronics manufacturers, device makers, and industrial system developers worldwide. The company designs, manufactures, and markets semiconductor components used in control systems, sensing, power management, and communications. Renesas Electronics was formed in 2010 through the merger of Renesas Technology and NEC Electronics, building on semiconductor businesses of Hitachi and Mitsubishi Electric. The company is headquartered in Tokyo, Japan. Renesas operates design centers, manufacturing facilities, and sales offices across Asia, Europe, and the Americas. Renesas Electronics employs about 23,000 people worldwide.