Switching power supply circuit is a common power supply circuit, its working principle is to use the conduction and cut-off state of the switching tube to control the power supply output voltage and current. Switching power supply circuits have the advantages of high efficiency, good stability, small size, light weight and so on, so they are widely used in electronic equipment, communication equipment, instrumentation and other fields.
Below we have a detailed understanding of the working principle and application of switching power supply circuit.
The working principle of switching power supply circuit
Switching power supply circuit is mainly composed of transformer, rectifier circuit, filter circuit, switching circuit and control circuit. Among them, the transformer is to transform the input AC voltage into the required DC voltage, the rectifier circuit converts the AC voltage into pulse voltage, the filter circuit filters the pulse voltage, the switching circuit controls the output voltage and current, and the control circuit controls the switching circuit.
Switching power supply circuit works as follows:
1. Input voltage is converted into required DC voltage by transformer;
2. Rectifier circuit converts DC voltage into pulse voltage;
3. Filter circuit filters pulse voltage to get smooth DC voltage;
4. Switching circuit controls output voltage and current to adjust the DC voltage to the desired value;
5. The control circuit controls the switching circuit to ensure the stability of the output voltage and current.
Switching power supply circuit applications
Switching power supply circuits are widely used in electronic equipment, communication equipment, instrumentation and other fields. Its applications are mainly in the following areas:
1. Electronic equipment: switching power supply circuits can provide a stable power supply for electronic equipment to ensure the normal operation of the equipment.
2. Communication equipment: switching power supply circuits can provide stable power for communication equipment to ensure the normal operation of communication equipment.
3. Instrumentation: Switching power supply circuits can provide stable power for instrumentation to ensure the accuracy and stability of instrumentation.
4. Solar panels: switching power supply circuit can convert the DC voltage output from solar panels into the required voltage, providing clean and renewable energy for home, industry and other fields.
Operating steps
1. Select the appropriate switching power supply circuit schematic diagram according to the need;
2. Connect the circuit according to the circuit schematic diagram, pay attention to the correctness and stability of the circuit connection;
3. Turn on the power supply, adjust the switching circuit to ensure the stability of the output voltage and current;
4. Test the performance of the circuit and check the The working state of the circuit to ensure the normal operation of the circuit.