Renesas Adds GaN-Based Half-Wave LLC Platform to AC/DC and Power Adapter Range

Why It Matters

The HWLLC platform lets OEMs create ultra‑compact, high‑efficiency chargers, accelerating adoption of 240 W USB‑PD and reducing product costs. This breakthrough positions Renesas as a key enabler of next‑generation power‑dense devices in a market demanding smaller, greener solutions.

Key Takeaways

• 500 W GaN HWLLC scales from 100 W to 500 W
• 96.5% peak efficiency, 3 W/cc power density
• Four integrated ICs simplify design and BOM
• Supports 240 W USB‑PD EPR, 5‑48 V range
• Reduces size, heat, and EMI versus legacy LLC

Pulse Analysis

Renesas’ new GaN‑based half‑wave LLC (HWLLC) platform arrives at a pivotal moment for high‑power charging. As consumer electronics and industrial equipment push toward faster, higher‑wattage power delivery, designers need solutions that combine compact form factors with top‑tier efficiency. The HWLLC architecture, built on Renesas’ SuperGaN depletion‑mode technology, delivers up to 500 W while maintaining a peak efficiency of 96.5%, allowing manufacturers to replace bulky traditional LLC converters with a fraction of the volume and thermal load. This shift not only meets the growing demand for 240 W USB‑PD EPR chargers but also opens doors for power‑intensive applications such as e‑bikes, power tools, and medical devices.

From a technical standpoint, the HWLLC ecosystem integrates four purpose‑built controller ICs, including the RRW11011 interleaved PFC/HWLLC combo, a USB‑PD protocol controller, a half‑bridge GaN driver, and an intelligent synchronous rectifier. By eliminating transformer windings and reducing component count, the solution cuts BOM complexity, lowers EMI, and improves reliability. The interleaved PFC with phase‑shift control cancels ripple, enabling smaller input filters and tighter thermal budgets. Moreover, the wide 5 V‑48 V output range supports diverse charging standards, while the zero‑standby power (ZSP) feature aligns with stringent energy‑efficiency regulations.

The market implications are significant. With the HWLLC platform now in production and showcased at APEC 2026, OEMs can accelerate time‑to‑market for next‑generation adapters and chargers, leveraging Renesas’ "Winning Combinations" reference designs that cover over 400 system configurations. This ecosystem reduces development risk and fosters rapid scaling across consumer, industrial, and infrastructure segments. As global demand for high‑density, low‑loss power solutions grows, Renesas’ GaN HWLLC positions the company as a strategic supplier, potentially reshaping the competitive landscape of power‑management ICs and driving broader adoption of ultra‑compact, energy‑conscious charging technologies.