When DC is connected to a capacitor, it plays the role of bypass, decoupling, filtering, and energy storage.
1. The bypass capacitor is an energy storage device that provides energy to local devices. It can even out the output of the voltage regulator and reduce load requirements. Like a small rechargeable battery, the bypass capacitor can be charged and discharged into the device.
2. Remove lotus roots, also known as lotus root removal. From a circuit perspective, it can always be distinguished into a driven source and a driven load. If the load capacitance is relatively large, the drive circuit must charge and discharge the capacitor to complete the signal transition. When the rising edge is relatively steep, the current is relatively large, so the driving current will absorb a large power supply current.
3. The function of the capacitor is to pass high frequencies and resist low frequencies, and to pass high frequencies and resist low frequencies. The larger the capacitor, the easier it is for low frequencies to pass, and the larger the capacitor, the easier it is for high frequencies to pass. Specifically used in filtering, large capacitors filter low frequencies, and small capacitors filter high frequencies.
4. The energy storage capacitor collects charges through the rectifier and transmits the stored energy to the output end of the power supply through the converter leads.
直流电接电容时起到了旁路、去藕、滤波、储能的作用。
1、旁路电容是为本地器件提供能量的储能器件，它能使稳压器的输出均匀化，降低负载需求。就像小型可充电电池一样，旁路电容能够被充电，并向器件进行放电。
2、去藕，又称解藕。从电路来说，总是可以区分为驱动的源和被驱动的负载。如果负载电容比较大，驱动电路要把电容充电、放电，才能完成信号的跳变，在上升沿比较陡峭的时候，电流比较大，这样驱动的电流就会吸收很大的电源电流。
3、电容的作用就是通高阻低，通高频阻低频。电容越大低频越容易通过，电容越大高频越容易通过。具体用在滤波中,大电容滤低频，小电容滤高频。
4、储能型电容器通过整流器收集电荷，并将存储的能量通过变换器引线传送至电源的输出端。
