Search Results - xiucheng+huang

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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....
Published: 4/11/2016   |   Inventor(s): Fred Lee, Xiucheng Huang, Qiang Li
Category(s): Electrical, Energy, Engineering
A Novel Driving Scheme for Synchronous Rectifier in CRM Flyback
Synchronous rectifier (SR) is widely adopted in flyback converter to reduce the conduction loss. However, the conventional SR driving method based on direct current or voltage sensing is sensitive to the parasitic ring, which may cause SR early turn off and therefore decrease the converter efficiency. This innovation presents a novel SR driving method...
Published: 2/27/2015   |   Inventor(s): Xiucheng Huang, Fred Lee, Qiang Li
Category(s): Electrical, Energy, Engineering
Avoiding Internal Switching Loss in Cascode Structure Device Under Soft-Switching Condition
This innovation presents a universal method to prevent cascode structure device achieves avalanche during turn-off period, and avoid the internal switching loss of the device during soft-switching period by optimizing the internal charge balance condition. It can be easily implemented and suitable for integration and mass production.
Published: 12/19/2013   |   Inventor(s): Xiucheng Huang, Weijing Du, Qiang Li, Fred Lee
Category(s): Electrical, Engineering