Transphorm, Inc. and Weltrend Semiconductor Inc. announced availability of a 100 watt USB-C PD Power Adapter Reference Design. The board uses the companies? SuperGaN® System-in-Package (SiP)?the WT7162RHUG24A?to achieve 92.7% efficiency in a Quasi-Resonant Flyback (QRF) topology.

This is Weltrend?s second USB-C PD adapter board using the WT7162RHUG24A in a QRF topology. The first is a 65-watt board released earlier this year. The fact that both boards deploy the same SuperGaN SiP is beneficial to customers seeking to achieve economies of scale and a lower cost implementation for 100-watt designs compared to the competition.

It demonstrates that the 65-watt-class SuperGaN SiP also meets the performance and thermal requirements of 100-watt designs. Weltrend?s universal 100-watt power adapter board is designed to the USB PD 3.0 + PPS standards. Its use is intended to speed development of various high performance, low-profile power adapters charging smartphones, tablets, laptops, and other smart devices.

Additional key specifications follow: GaN Device - WT7162RHUG24A SuperGaN SiP. Topology - Boundary Mode PFC + Flyback Quasi-Resonant Mode/Valley-Switching Multi-mode Operation. Full Load Efficiency - 91.2% @ 90 VAC/Full Load.

Overall Peak Efficiency - 92.7% @ 264VAC/Full Load. Power Density - 15.8 W/in (w/o housing). Output Voltage Operation - USB-C PD 3.0, PPS 3.3 V - 21 V. No Load Power Loss - < 50 mW @ 264 VAC.

Output Voltage and Current - PPS: 3.3 V ? 21 V/5 A 5 V/3 A; 9 V/3 A; 12 V/3 A; 15 V/3 A; 20 V/5 A. EMI Compliant - Conducted and Radiated. Dimensions - 69mm x 63mm x 23.8mm.

The WT7162RHUG24A is a true integrated circuit designed for use in 45- to 100-watt USB-C PD power adapters. It integrates Weltrend?s WT7162RHSG08 quasi-resonant/multi-mode flyback PWM controller with Transphorm?s 240 milliohm, 650-volt SuperGaN® FET. The surface mount device is available in a 24-pin 8x8 QFN package and offers a peak efficiency of 92.7%.

Key benefits include increased power density with better thermal management for long-term reliability and reduction of BOM costs.