48-V voltage regulator module with PCB winding matrix transformer for future data centers

MH Ahmed, C Fei, FC Lee, Q Li - IEEE Transactions on …, 2017 - ieeexplore.ieee.org
Efficient power delivery architecture is gaining more attention in the design of future
generations of data centers in order to minimize the ever increasing trend of power …

Two-stage 48-V VRM with intermediate bus voltage optimization for data centers

MH Ahmed, FC Lee, Q Li - … of Emerging and Selected Topics in …, 2020 - ieeexplore.ieee.org
In this article, a high-efficiency and power-density unregulated inductor-inductor-capacitor
(LLC) converter (DCX) is proposed for a first-stage converter in a two-stage 48-V voltage …

New high-frequency core loss measurement method with partial cancellation concept

D Hou, M Mu, FC Lee, Q Li - IEEE Transactions on Power …, 2016 - ieeexplore.ieee.org
As an essential part in a power converter, the magnetic cores and their design play an
important role in achieving high efficiency and high power density. Accurate measurement of …

Microcontroller-based MHz totem-pole PFC with critical mode control

Z Huang, Z Liu, Q Li, FC Lee - 2016 IEEE Energy Conversion …, 2016 - ieeexplore.ieee.org
This paper focuses on how to implement critical conduction mode (CRM) control for GaN-
based MHz totem-pole PFC with a commercial low-cost microcontroller (MCU), including …

Ultralow input–output capacitance PCB-embedded dual-output gate-drive power supply for 650 V GaN-based half-bridges

B Sun, R Burgos, D Boroyevich - IEEE Transactions on Power …, 2018 - ieeexplore.ieee.org
Wide-bandgap devices have been widely used to reduce the size and increase the
efficiency of power converters by operating at a high switching frequency, at the expense of …

A novel PCB-embedded coupled inductor structure for a 20-MHz integrated voltage regulator

F Zhu, Q Li - IEEE Journal of Emerging and Selected Topics in …, 2022 - ieeexplore.ieee.org
As power demands of processors in portable electronics continuously grow, the voltage
regulator (VR) for the processor is expected to be efficient and miniaturized. Compared with …

Very high frequency IVR for small portable electronics with high-current multiphase 3-D integrated magnetics

D Hou, FC Lee, Q Li - IEEE Transactions on Power Electronics, 2016 - ieeexplore.ieee.org
As today's small portable electronics (smartphones, tablets, e-readers, etc.) becomes lighter,
thinner, quicker, and smarter, the voltage regulator for the processor is expected to be …

High efficiency two-stage 48V VRM with PCB winding matrix transformer

M Ahmed, C Fei, FC Lee, Q Li - 2016 IEEE Energy Conversion …, 2016 - ieeexplore.ieee.org
High efficiency power supply solutions for data centers are gaining more attention, in order
to minimize the fast growing power demands of such loads, the 48V Voltage Regulator …

Inversely coupled inductors with small volume and reduced power loss for switching converters

W Huang, B Lehman - IEEE Transactions on Power Electronics, 2023 - ieeexplore.ieee.org
The letter presents a patent of lateral coupled inductor structure and its applications in single-
phase and multiphase dc–dc converters. The central processing units (CPUs), graphics …

Critical-mode-based soft-switching modulation for three-phase inverters

Z Huang, Z Liu, FC Lee, Q Li… - 2017 IEEE Energy …, 2017 - ieeexplore.ieee.org
In this paper, a new critical-conduction-mode (CRM)-based modulation is proposed for three-
phase inverters. With this modulation, soft switching is achieved and the efficiency of the …