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首页> 外文期刊>Circuits and Systems I: Regular Papers, IEEE Transactions on >Study of Subharmonic Oscillation Mechanism and Effect of Circuit Propagation Delay for Buck Converters With Constant On-Time Control
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Study of Subharmonic Oscillation Mechanism and Effect of Circuit Propagation Delay for Buck Converters With Constant On-Time Control

机译：恒定导通时间控制的Buck变换器的次谐波振荡机理及电路传播延迟的影响

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摘要

This paper explores the subharmonic oscillation mechanism for constant on-time control, which has been widely used for power supply controllers in industry. As well as analyzing the stability criterion, this research reveals that the circuit propagation delay $(Delta t)$ can significantly increase the demand of $ESRcdot C_{o}$ value for stable operation in practical applications. A thorough study is provided based on the inductor current information and the charge variations of the output capacitor. Thus, critical condition for subharmonic oscillation is derived, and the effect of circuit propagation delay is also quantified. Based on detailed analysis, a prototype with constant on-time control and added inductor current ramp is built. Experimental results verify the theoretical analysis.
机译：本文探讨了用于恒定导通时间控制的次谐波振荡机制，该机制已被广泛用于工业电源控制器中。除了分析稳定性标准外，这项研究还表明，电路传播延迟$（Δt）$可以显着增加对$ ESRcdot C_ {o} $值的需求，以便在实际应用中稳定运行。根据电感器电流信息和输出电容器的电荷变化，进行了深入研究。因此，得出了次谐波振荡的临界条件，并且还量化了电路传播延迟的影响。在详细分析的基础上，构建了具有恒定导通时间控制和附加电感器电流斜坡的原型。实验结果验证了理论分析。

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