一种适用于基于纹波的恒定导通时间架构Buck变换器片内纹波补偿方案

doi:10.19595/j.cnki.1000-6753.tces.160934

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Abstract Subharmonic oscillation will exist when ceramic capacitors are used as the output filter capacitors of ripple-based constant on-time (RBCOT) Buck converter. A novel on-chip ripple compensation scheme is proposed in the paper to alleviate such problem. This ripple compensation scheme can enhance system stability without adding any IC peripheral components and has good transient response performance. Describing function (DF) method is used to derive the small-signal model and analyze the stability of the proposed ripple compensation scheme. Simplis simulation results verify the system model and stability criterion derived. The experimental results further validate the theoretical analysis.

Key words： Ripple-based constant on-time architecture subharmonic oscillation ceramic capacitor ripple compensation describing function

Received: 21 June 2016 Published: 05 March 2018

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TM46

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	Gao Xia
	Feng Quanyuan

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Gao Xia,Feng Quanyuan. An On-Chip Ripple Compensation Scheme for Ripple-Based Constant On-Time Architecture Buck Converter[J]. Transactions of China Electrotechnical Society, 2018, 33(4): 892-899.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.160934 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I4/892

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