应用于CPU板载开关电源输入端电容的快速选取方法

A Quick Method of Choosing Input Capacitors for CPU Switching Voltage Regulator Down(VRD) Circuit

介绍了应用于CPU的板载DC/DC BUCK降压型连续电感电流模式开关电源电路(VRD)输入端输入电容的一种快速选取方法。文中阐明了输入端电容的重要作用,详细分析了其参数,工作原理等,并进一步推导出了具体的输入电容选择的工程计算应用公式,可以帮助工程技术人员根据不同的设计要求快速选取满足要求的输入电容设计方案,大大简化了整个设计过程。

A quick method of choosing right input capacitors for CPU step down CCM switching voltage regulator down （VRD） circuit is presented in this paper. And the importance of input capacitors is also analyzed, as well as its parameters and working principle. Then engineering application formulas to calculate input capacitors are deduced. With these formulas, engineers can get the right input capacitors solution for their specific DC-DC buck circuit in a very short time.