학술논문
Single-Switch Soft-Switched High-Step-Down Converter With Self-Driven Synchronous Rectifier
Document Type
Periodical
Author
Source
IEEE Transactions on Industrial Electronics IEEE Trans. Ind. Electron. Industrial Electronics, IEEE Transactions on. 71(8):8763-8770 Aug, 2024
Subject
Language
ISSN
0278-0046
1557-9948
1557-9948
Abstract
A new fully soft-switched nonisolated high-step-down converter is presented in this article. The proposed converter utilizes only one switch and a self-driven synchronous rectifier to implement a fully soft-switched pulsewidth modulation high-step-down converter. In addition, the single switch does not require an isolated gate drive, which further simplifies the converter control. The main switch is turned on and off under zero-current-switching and zero-voltage-switching (ZVS) conditions, respectively. The extended duty cycle enables the converter to have a wide input voltage range and reduce the switch current stress. Also, the self-driven synchronous rectifier turns on and off under ZVS condition. These merits have contributed to the improved efficiency of the proposed converter with respect to other counterparts. To verify the converter characteristics, a 150 V to 12 V converter prototype operating at 100 W and 100 kHz is implemented and the results indicate 97% efficiency at full load.