Influence of the Rectifier's Output Capacitance on the ZVS Transition in Asymmetrical Half-Bridge PWM Converters

Kohlhepp B, Barwig M, Dürbaum T (2019)

Publication Type: Conference contribution

Publication year: 2019

Publisher: Institute of Electrical and Electronics Engineers Inc.

Pages Range: 1107-1114

Conference Proceedings Title: ICPE 2019 - ECCE Asia - 10th International Conference on Power Electronics - ECCE Asia

Event location: Busan KR

ISBN: 9788957083130

Abstract

High sales quantities and an ongoing miniaturization of notebook power supplies require an improvement of their efficiency. In order to achieve a high power density, a high switching frequency in combination with low losses is necessary. The asymmetrical half-bridge PWM converter fits perfect for these requirements, as it allows zero voltage switching (ZVS) for the half-bridge MOSFETs, which is necessary for an efficient design. Furthermore, high efficiency requires the use of a synchronous rectifier. Unfortunately, measurements on a test setup reveal, that the parasitic output capacitance of the rectifier has a significant influence on the ZVS transition. This is due to the comparably very large output capacitance accompanied with low ohmic MOSFETs. For this reason, the paper examines the ZVS process of the input half-bridge considering the rectifier's parasitic output capacitance. Furthermore, the required dead time of the half-bridge is predicted, taking the parasitic capacitance into account.

Authors with CRIS profile

Benedikt Kohlhepp Professur für Optoelektronik Markus Barwig Professur für Optoelektronik Thomas Dürbaum Professur für Elektromagnetische Felder

How to cite

APA:

Kohlhepp, B., Barwig, M., & Dürbaum, T. (2019). Influence of the Rectifier's Output Capacitance on the ZVS Transition in Asymmetrical Half-Bridge PWM Converters. In ICPE 2019 - ECCE Asia - 10th International Conference on Power Electronics - ECCE Asia (pp. 1107-1114). Busan, KR: Institute of Electrical and Electronics Engineers Inc..

MLA:

Kohlhepp, Benedikt, Markus Barwig, and Thomas Dürbaum. "Influence of the Rectifier's Output Capacitance on the ZVS Transition in Asymmetrical Half-Bridge PWM Converters." Proceedings of the 10th International Conference on Power Electronics - ECCE Asia, ICPE 2019 - ECCE Asia, Busan Institute of Electrical and Electronics Engineers Inc., 2019. 1107-1114.

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