Switching power supply, what is the difference between the charger
Chargers usually refer to a device that converts alternating current into low voltage direct current.
And the switching power supply is also the exchange of DC.We are now using the mobile phone charger are generally switching power supply (the advantages of small size, light weight, high efficiency.) Before the old phone with some of the charger is not switching power supply it Inside the transformer transformer and then rectifier filter (because it is used in the transformer, so the volume to be bigger, a little cumbersome, less efficient).
2, the switching power supply is a form of power conversion, the characteristics of the power supply is working in the switch state.As the switching power supply efficiency, so it has been a very wide range of applications. Charger is usually 220V AC power supply into the appropriate DC voltage, Charger can be used to make the charger, but he also used in color TV, VCD and other occasions, with one of the following one. The charger can be used to make the charger, but he also used in color TV, VCD and other occasions, with the following one Simple diagram to express the relationship between the two:
1, we all know that the electricity is 220V / 50Hz AC, and the computer system components are low-voltage direct current, so the power supply is the protagonist of computer power supply, if the current than blood, then the power is the heart of the computer. After the power into the power, the first through the choke coil and capacitor filter high-frequency clutter and interference signals, followed by rectification and filtering to get high-voltage direct current, and then into the power of the core part of the switch circuit is mainly responsible for DC conversion For the high-frequency pulsating direct current, and then send high-frequency switching transformer buck, and then filter out the high-frequency AC part, so that the computer needs more "pure" low-voltage direct current because the computer power is the core part of the switch circuit, Usually referred to as switching power supply.
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Therefore, the switching power supply is popular on the computer "transformer", the AC power into a fixed DC power supply to the computer components to use.However, the switching power supply and linear power supply is not the same: it first 220V AC change Into the DC, and then through the converter to DC into AC, and finally turn the AC into a DC output. The reason for the conversion to high frequency AC is the high frequency AC in the transformer transformer circuit efficiency is much higher than 50Hz, so the switch Transformers can do very little, and work is not very hot, if not 50Hz into high-frequency switching power supply does not make sense!
