反激式开关电容PWM直流变换器

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Abstract Nowadays, the point-of-load (POL) converters are Buck, Boost and other PWM DC-DC converters. The inductor exists in their power loop and the dynamic performance is limited. Based on the ZVS self-driven non-isolated full-bridge converter, this paper proposes a novel flyback switching capacitor PWM DC-DC converter. The converter is the combination of a switching capacitor converter and a PWM converter, and it has both good transient performance and regulated output voltage. Besides, it has the following advantages: ①The switches realize zero voltage switching. ②An additional transformer winding self-driven method is applied to reduce the drive loss and the synchronous rectifier body diode conduction loss. ③Its efficiency is not sensitive to leakage inductor, so that the ordinary discrete transformer which is easy to install can be used to save the cost. ④Single phase option makes it more flexible. Its derivation, operation principle and self-driven method are presented. A single-phase 700kHz 1.2V/35A output POL prototype was built to verify the analysis.

Key words： Switching capacitor converter PWM converter self-driven zero voltage switching

Received: 18 April 2011 Published: 25 March 2014

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TM46

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	Articles by authors
	Cao Wenjing
	Gu Ling
	Jin Ke
	Ruan Xinbo

Cite this article:

Cao Wenjing,Gu Ling,Jin Ke等. A Flyback Switching Capacitor PWM DC-DC Converter[J]. Transactions of China Electrotechnical Society, 2013, 28(4): 87-94.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I4/87

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