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Common troubleshooting methods of switching power supply

Date:2018/11/14 17:30:12 Click:3912
Common troubleshooting methods of switching power supply

Switching power supply is a kind of power supply which uses modern power electronics technology to control the time ratio of switching transistor on and off and maintain stable output voltage. Widely used in industry, military, scientific research, communications, medical and a variety of household appliances. The development and application of switching power supply are of great significance in energy saving, resource saving and environmental protection. Next, let's take a look at the circuit diagram and maintenance techniques of switching power supply.

The main circuit of switching power supply is composed of input electromagnetic interference filter (EMI), rectifier filter circuit, power conversion circuit, PWM controller circuit and output rectifier filter circuit. Auxiliary circuits include input over-voltage protection circuit, output over-voltage protection circuit, output over-current protection circuit, output short circuit protection circuit, etc.