谐振电容电压反馈单输入多输出反激式变换器

doi:10.19595/j.cnki.1000-6753.tces.160010

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Abstract A resonant capacitor voltage feedback control method for an asymmetrical half-bridge flyback converter is proposed in this paper. It can reduce the number of devices, save the costs and improve the efficiency in low power supply applications. By using this control method, the control structure of the isolated single-input multi-output converter is simplified. Moreover, there is no compensating circuit for the designed constant on-time controller. Since the feedback voltage signal for the control strategy is taken from the primary side resonant capacitor, it has large voltage ripple resulting in the pulse bursting phenomenon of constant on-time control, which makes the converter unstable. To restrain the pulse bursting phenomenon caused by the large voltage ripple, the constant on-time control with ripple compensation is used to suppress the feedback signal voltage ripple. Thus, the stability of the converter is guaranteed. Finally, the experimental prototype has verified the theoretical analysis and designing method.

Key words： Single-input multi-output, DC-DC, resonance network, ripple compensated constant on time

Received: 06 January 2016 Published: 01 August 2017

PACS:	TM46
	TM13

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	Wang Wu
	Lu Dexiang
	Lin Qiongbin
	Cai Fenghuang

Cite this article:

Wang Wu,Lu Dexiang,Lin Qiongbin等. Resonant Capacitor Voltage Feedback of Single-Input Multi-Output Flyback Converter[J]. Transactions of China Electrotechnical Society, 2017, 32(14): 96-105.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.160010 OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I14/96

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