考虑ESR的DC-DC型开关变换器的研究

电容的寄生参数串联等效电阻（ESR）是电容的一个重要参数,它对电路的性能有较大影响,特别是当电容用于DC-DC型开关变换器中输出电压滤波时对输出电压的纹波影响较大,由于电容的ESR存在,它增加了DC-DC型开关变换器动态小信号数学模型的一个零点,在分析和设计DC-DC型开关变换器系统中应予以重视。文中以Buck型开关变换器为例,分析讨论了电容串联等效电阻对Buck型开关变换器的输出纹波电压及动态小信号数学模型的影响,利用psim软件对所得的结论进行了仿真验证。所得到的结论对DC-DC型开关变换器其它拓扑的滤波电容的选择和控制系统设计有参考价值。

Consider the ESR of the DC-DC Switching Converter

Capacitance of parasitic parameter series equivalent resistance (ESR) is capacitance of a important parameter,it on circuit of performance has larger effect,especially Dang capacitance for DC-DC type switch transform device in the output voltage filtering Shi on output voltage of sheath wave effect larger,due to capacitance of ESR exists,it increased has DC-DC type switch transform device dynamic small signal mathematics model of a zero points,in analysis and design DC-DC type switch transform device system in the should be attention.The article by Buck switching converter,for example,analyzed and discussed the capacitor equivalent series resistance of Buck switching converter output ripple voltage and the dynamic effects of small-signal mathematical model,using psim software conclusions for simulation.To the conclusion of the DC-DC switching converter topologies other filter capacitor selection and control system design reference value.