The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2025
Filed:
Mar. 10, 2023
Acbel Polytech Inc., New Taipei, TW;
National Tsing Hua University, Hsinchu, TW;
Wei-Hua Chieng, Hsinchu, TW;
Yi Chang, Hsinchu, TW;
Da-Jeng Yao, Hsinchu, TW;
Li-Chuan Tang, Hsinchu, TW;
Chih-Chiang Wu, Hsinchu, TW;
Yueh-Tsung Shieh, Hsinchu, TW;
Ching-Yao Liu, Hsinchu, TW;
ACBEL POLYTECH INC., New Taipei, TW;
NATIONAL TSING HUA UNIVERSITY, Hsinchu, TW;
Abstract
A D-mode GaN transistor synchronous rectifier of the present invention includes a power switching module, a peak detection module, and a gate driver module. The peak detection module stores energy when the negative end of the secondary side winding of the power converter is at a high voltage. The power switching module includes a first switch and a D-mode GaN HEMT as a second switch connected in series. The energy is provided to the module gate of the power switching module through the gate driver module to keep the first switch turned on. The gate driver module conducts the module gate and the module source when the positive end of the secondary side winding is at a low voltage, such that a clamp circuit pulls the gate-source voltage of the second switch below threshold and turns it off. The synchronous rectifier replaces conventional diode rectifier, having lower conduction loss and response ringing.