电流型控制三态Boost变换器的小信号建模与负载瞬态特性分析

doi:10.19595/j.cnki.1000-6753.tces.180395

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Abstract To improve the load transient response speed, the current mode control technique was applied to tri-state boost converter, whose corresponding operation principle was analyzed in detail. On the basis of considering the influence of output current variation for the circuit performance, the whole small signal models for the current mode constant reference current (CRC) and current mode dynamic reference current (DRC) controlled tri-state boost converter were established respectively. Based on the models, the output impedances of the two control techniques were deduced respectively, which were verified through the simulation results in frequency-domain. Besides, the corresponding low-frequency gains of the output impedances were analyzed and compared. The research results indicate that, comparing with the current mode DRC control, the current mode CRC controlled tri-state boost converter has lower low-frequency gains, therefore it has faster load transient response speed. Finally, experiment results verified the theoretical analysis.

Key words： Tri-state Boost converter current mode control small-signal modeling load transient response

Received: 22 March 2018 Published: 17 April 2019

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TM46

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	Zeng Shaohuan
	Zhou Gouhua
	Zhou Shuhan
	Mao Guihua

Cite this article:

Zeng Shaohuan,Zhou Gouhua,Zhou Shuhan等. Small-Signal Modeling and Load Transient Characteristic Analysis of Current Mode Controlled Tri-State Boost Converter[J]. Transactions of China Electrotechnical Society, 2019, 34(7): 1468-1477.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180395 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I7/1468

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