A Novel Compact 200 MHz GaN DC/DC Converter Module for Highly-Efficient PoL Supply
T. Hoffmann, A. Barber, L. Schellhase, D. Sun, A. Wentzel
Published in:
IEEE MTT-S Radio Frequency Technology and Techniques Symposium (IMS RFTT 2026), Boston, USA, Jun. 7-12, ISBN 979-8-3315-4766-0, pp. 545-548 (2026).
Abstract:
This paper presents a novel compact and highly-efficient GaN-based DC/DC converter module for 200 MHz switching frequency to supply point-of-loads (PoL) in data centers. By applying a distributed, integrated bypass capacitor into the power-stage, using high- and low-side push-pull and bootstrap drivers and an auxiliary transistor for the positive supply rail of the high-side driver as well as a freewheeling GaN Schottky barrier diode (SBD) at low output power, the proposed converter significantly reduces energy consumption of the drivers and increases the power conversion efficiencies of power-stage (ɳps) and complete converter (ɳtotal). The proposed Very High Frequency (VHF) converter achieves a maximum ɳps of 84% and ɳtotal of 80% for 25.4 W conversion from 32 V DC input voltage (Vdc_in) to 12.7 DC output voltage (Vout).
Ferdinand-Braun-Institut (FBH), Germany
Keywords:
Power converter, DC/DC, synchronous rectifier, GaN, point-of-load, VHF, conversion efficiency.
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