Universal System Structure for Low Power Adapters

This innovation presents a novel system structure for low power adapters both for the power level below and above 75W. The system is consisted two-stage, namely ac-dc rectifier and unregulated isolated dc-dc converter. The second stage operates at fixed switching frequency to achieve high efficiency as well as easy feedback control and SR driving scheme. The first stage tightly regulates the intermidium bus voltage and optionally regulate the input current depends on whether it is necessary to meet the current harmonic standard.

Patent Information:
For Information, Contact:
Li Chen
Licensing Associate
Virginia Tech Intellectual Properties, Inc.
(540) 443-9217
Fred Lee
Xiucheng Huang
Qiang Li