A New Frequency Controlled Half-bridge Converter with Hold-up Time Extension Circuit

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Hold-up time is a special requirement for the front end DC/DC converter in a server power supply. It forces the converter with the variable switching frequency to operate in a wide switching frequency range, which makes the regulation difficult and reduces the power density. In this paper a novel frequency controlled half bridge converter with the hold-up time extension circuit is proposed. During the hold-up time, the auxiliary switches are turned on, thus the resonant inductance is reduced and the voltage conversion ratio is increased. Therefore, the output capacitor of the power factor correction (PFC) circuit can be decreased, and the converter can have high power density. The proposed converter is verified by experimental results from a prototype with 700W, 400V input, and 12V output.
Publisher
KIPE
Issue Date
2008-06-30
Language
ENG
Citation

2008년 전력전자학술대회, pp.382 - 384

URI
http://hdl.handle.net/10203/162995
Appears in Collection
EE-Conference Papers(학술회의논문)
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