Detailed description of the switching power supply circuit diagram, circuit diagram design considerations
Switching power supply, maybe you have heard a little about this term, but you are no stranger to your mobile phone charger or laptop. They have a switching power supply, and the circuit diagram of the switching power supply is also for the switching power supply. It is important. Let home decoration editor that gives you explain the switching power supply circuit diagram of considerations when designing a switching power supply circuit diagram and explain it.
Detailed description of the switching power supply circuit diagram
First, the main circuit
The entire process from AC grid input and DC output, including:
1. Input filter: Its function is to filter the clutter existing in the power grid, and also hinder the clutter generated by the machine from being fed back to the public power grid.
2. Rectification and filtering: The AC power supply of the power grid is directly rectified into a smoother DC power for the next level of transformation.
3. Inverter: The rectified DC power is changed into high frequency AC power, which is the core part of the high frequency switching power supply. The higher the frequency, the smaller the ratio of volume, weight and output power.
4. Output rectification and filtering: Provide stable and reliable DC power supply according to load requirements.
Second, the control circuit: on the one hand sampling from the output, compared with the set standard, and then to control the inverter, change its frequency or pulse width, to achieve output stability, on the other hand, according to the information provided by the test circuit, Protection circuit identification, providing control circuit to carry out various protection measures for the whole machine.
Third, the detection circuit: In addition to providing various parameters in the protection circuit is running, it also provides a variety of display instrument data.
4. Auxiliary Power Supply: Provides different power requirements for all single circuits.
Precautions when designing the switching power supply circuit diagram
1, wiring
The design requirements of the wiring are very strict in the design of the switching power supply. If the designer did not handle the wiring work in the early stage of design, there would be a great safety hazard in the future power consumption. So here
2, the device layout
The design of the element is also very important. When designing, you must follow the physical design principle. Do not change the position of the element by your own idea to prevent the occurrence of a short circuit. In addition, the designer must also check the quality of the product when purchasing the device.
3, parameters
In the design of the switching power supply, we must understand every construction detail inside, especially to remember the parameters, so that we can specify the future use. Detailed parameters also facilitate the testing of the switching power supply later.
4, check
After designing each switching power supply, it must undergo strict inspection before it can be produced. Only by checking can determine the availability and applicability of the switching power supply, so that the switching power supply can be priced. At the time of inspection, we first start from the circuit to detect the real working environment of the switching power supply. Under what circumstances, the working operation is most suitable to avoid circuit accidents in some environments. Safety is the first thing we should care about, so we need Check the switching power supply carefully.
5, choose the right power
In order to make the life of the switching power supply longer, I suggest to choose the model with 30% output power rating. If the system requires a 100W power supply, then it is recommended to select a model with a power rating greater than 140W, and so on to effectively improve the life of the power supply.
Now I have a certain understanding of the circuit diagram of the switching power supply. I hope that if you encounter this problem in the future, you will not be able to start with the same day. If you want to know more about switches, stay tuned to the home of the decoration.
More related wonderful reading:
What are the brands of switching power supplies? Switching power supply buying tips
How to use the switching power supply? Switching power supply instructions
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