The working principle of capacitors in power supply design and the correct selection rules for capacitors in various power supplies 1

Capacitors are commonly used components in power supply design, mainly for storing charges, stabilizing voltage, filtering, and blocking DC. The working principle can be explained by a simple capacitance formula: a capacitor stores charge between two plates, and its capacitance depends on the area, dielectric constant, and spacing between the plates. When a capacitor is connected to a power source, it absorbs charge and stores it in the electric field between the two plates, resulting in a voltage difference. When it is necessary to release stored charges, capacitors will release the stored charges to meet the needs of the circuit.diode

Choosing the appropriate capacitor is crucial in various power supply designs. Here are some correct selection rules for capacitors:

1. Capacitor type: Select the appropriate type of capacitor according to the requirements of the power circuit, such as DCP022405P aluminum electrolytic capacitor, solid electrolytic capacitor, ceramic capacitor, etc.diode

2. Capacitance value: Select the appropriate capacitance value based on the power demand and frequency characteristics of the power supply, usually requiring capacitance calculation or simulation to determine the optimal value.diode