switching power supply four major components

With the development and innovation of power electronics technology, it makes the switching power supply technology is also constantly innovating. At present, switching power supply with small, lightweight and high efficiency is widely used in almost all electronic equipment, is today's rapid development of electronic information industry indispensable to a power supply method. So do you know which parts of the switching power supply is mainly composed of? Next power adapter manufacturers will give you a brief introduction to it.

There are two kinds of modern switching power supply: one is DC switching power supply; the other is AC switching power supply. Switching power supply is composed of four main circuits, control circuits, detection circuits, auxiliary power supply.

1, the main circuit

Inrush current limiting: Limit the inrush current on the input side at the moment of power on.

Input filter: its role is to filter the grid of the presence of stray waves and impede the machine generated stray wave feedback back to the grid.

Rectification and Filtering: Directly rectify the AC power from the grid to a smoother DC power.

Inverter: The rectified DC power is changed into high frequency AC power, which is the core part of high frequency switching power supply.

Output rectification and filtering: provide stable and reliable DC power supply according to the needs of the load.

2、Control circuit

On the one hand, sampling from the output, compared with the set value, and then go to control the inverter, change its pulse width or pulse frequency, so that the output is stabilized, on the other hand, according to the data provided by the test circuit, identified by the protection circuit, to provide the control circuit of the power supply to carry out a variety of protective measures.

3、Test circuit

Provide the protection circuit is running in a variety of parameters and a variety of instrumentation data.

4、Auxiliary power supply

Realize the software (remote) start of the power supply, power supply for the protection circuit and control circuit (PWM and other chips) work.

The above is the power adapter manufacturers summarize the four major components of the switching power supply, I hope to be able to help you better understand the switching power supply.

Eahunt is the source manufacturer, experienced in developing and designing power supply products, the production capacity is also very sufficient, the quality of the quality is also done very certified, and only do safety regulation power supply, so many domestic and foreign companies like to find Eahunt production of customized power adapters!

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