The Impact of Dead-time on Synchronous Rectification Circuit Efficiency
- DOI
- 10.2991/wcnme-19.2019.29How to use a DOI?
- Keywords
- synchronous rectifier; dead-time; efficiency; ringing effect
- Abstract
In the synchronous rectification circuit, due to the junction capacitance of MOSFETs and other factors, an on-and-off delay problem exists, which further leads to phenomenon of circuit short, circuit heating and inefficiencies. These phenomenon can be reduced significantly by setting an appropriate dead-time to prevent direct conduction from the opposite MOSFETs. However, the current determination of dead-time is investigated mainly empirically and unreasonable setting of dead-time will affect the work of circuit. This paper will discuss the relationship between dead-time and the efficiency of the synchronous rectifier buck circuit ,it will draw the conclusion that the increased dead-time can eliminate the self-excited ringing effect and improve the working efficiency of the power supply at low voltage when the output amplitude requirement is satisfied .The experimental verification is carried out with a synchronous rectification Buck circuit with an operating frequency of 20kHz, an input voltage of 20 volts, an output range of 0 to 19 volts and a variable dead-time. The conclusions of this paper are of great significance to the design of power supply circuit, improving its working efficiency and reliability.
- Copyright
- © 2019, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Hanshen Wang AU - Jian Guo AU - Jingli Gong AU - Jianfei Chen AU - Sheng Zhang PY - 2019/06 DA - 2019/06 TI - The Impact of Dead-time on Synchronous Rectification Circuit Efficiency BT - Proceedings of the 2019 International Conference on Wireless Communication, Network and Multimedia Engineering (WCNME 2019) PB - Atlantis Press SP - 125 EP - 128 SN - 2352-538X UR - https://doi.org/10.2991/wcnme-19.2019.29 DO - 10.2991/wcnme-19.2019.29 ID - Wang2019/06 ER -