Universal Power Supply Laptop Charger Adaptor For HP Dell Lenovo Acer Toshiba Cargador Replacement Adapter

What is the workflow of switching power supply? How to select?

In fact, life is ubiquitous switching power supply, its model is more, and different power, although there are some can be generalized, but in general or according to the situation to use a special switching power supply. What is the workflow of the switching power supply? How to select? Today we look together.

First, the workflow of switching power supply
Switching DC regulated power supply main link: input grid filter input rectifier filter - inverter - output rectifier filter - control circuit - protection circuit.
1, input grid filter: to eliminate interference from the grid, such as motor start, electrical switching, lightning, etc., but also to prevent the high-frequency noise generated by the switching power supply to the grid.
2、Input rectifier filter: rectify and filter the input voltage from the power grid to provide DC voltage for the converter.
3, inverter: is the key part of the switching power supply. It converts the DC voltage into high-frequency AC voltage and isolates the output part from the input grid.
4, the output rectifier filter: the converter output high-frequency AC voltage rectifier filter to get the required DC voltage, but also to prevent high-frequency noise on the load interference.
5, the control circuit: detect the output DC voltage, and compare it with the reference voltage, amplification. Modulate the pulse width of the oscillator to control the converter to keep the output voltage stable.
6, protection circuit: when the switching power supply occurs over-voltage, over-current short circuit, the protection circuit makes the switching power supply to stop working to protect the load and the power supply itself.

Second, switching power supply should be how to choose
1, clear their needs.
Generally we are in their own use of the product failure will think of buying switching power supply, you can directly take the previous adapter to the appropriate store to buy. Basically sell electronic products or repair store will have this kind of switching power supply, the price is about dozens of dollars to a hundred dollars ranging, is not a very high price. And if you do not know what type of switching power supply they used to use, then it is best to suggest that the best is to directly take the products they use to the store to buy, try to switch, switching power supply really meet our requirements before buying, so you can also avoid unnecessary trouble.
2, choose the right brand.
Switching power supply brand or more, and its service life is also relatively long, like cell phone power supply may be used several times a day, if its quality is not high, it is easy to have problems. I believe that we are also more willing to buy high-quality products, although the price of the switching power supply on the market is about a few dozen dollars, but because we are non-professionals want to go to compare the advantages and disadvantages of the product is still a certain degree of difficulty, so it is necessary to choose the brand products. Big brands or big manufacturers of products are tested by the authority, the quality of its products is better, although the unit price to be slightly higher, but there will not be too big a price difference, more suitable for us to choose.
3, to determine the after-sales service.
Switching power supply can basically use a few years of time, of course, this is in the purchase of the product is a regular product on the basis of the long service life can be guaranteed. But we buy these products is best to determine the best and business after-sales service, if the use of a month within the problem, then the other side is to provide unconditional replacement of new products or to help us carry out maintenance. It is not recommended to choose non-branded products, the quality of such products is likely to have problems, and may even threaten our safety, and can provide better after-sales service business products are also more quality assurance.
Individuals buying switching power supply must choose professional products, brand-name products are about twice the price, but such products are more worthy of our trust, the use of its effect is better, but also more secure. And some large manufacturers produce high-quality products prices are not too much higher, but also to ensure the use of the product effect, more worthy of our trust. If you want to wholesale these products, be sure to choose a variety of types of models, through professional manufacturers to wholesale products, so as to ensure its quality.

If you want to know more about switching power supply information, you can consult Xiamen Eahunt Electronics.

Whatsapp:+86 13860786068

Email: athene-cai@eahunt.com

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