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Is the power adapter a switching power supply?ac power adapters Production

source:power adapter     Popular:adapter     release time:2021-11-27 09:59:01     Article author:sznbone    

  Is the power adapter a switching power supply?ac power adapters Production(图1)

  1. Features:

  The characteristics of the power adapter are: the power converter (that is, AC to DC), which converts alternating current to direct current, and then passes through the computer. It cannot protect the computer, but there is a storage (also called a charger) for storing power in the computer, so It can protect the computer during power outages.

  The characteristics of the switching power supply are: high-speed pass and cut-off with the switch tube controlled by the circuit. The direct current is converted into high-frequency alternating current and supplied to the transformer for transformation, and then the required one or more sets of voltages are generated! The reason for high-frequency AC is that the power of high-frequency AC in the transformer circuit is much higher than 50HZ. Therefore, the switching transformer can be made very small, and it is not very hot during operation!! The cost is very low. If 50HZ is not changed to high Frequency switching power supply is meaningless.

  Both switching power supplies and adapters are switching power supplies, which are composed of high-frequency switching tubes and their control circuits. The power adapter is a regulated switching power supply, and the switching power supply has a floating charge function. The voltage becomes larger as the current decreases, and in the end, there is only voltage but no current.

  2. Differences:

  Switching power supplies are a big category. The power adapter belongs to the switching power supply.

  3. Operating principle:

  In reality, most of the power adapters we come into contact with are switching power supplies. Switching power supply refers to a kind of power supply that maintains a stable output voltage through modern electronic technology, controlling the time ratio of switching tube registration and turning off, and maintains a stable output voltage. The switching power supply of the power adapter is generally composed of pulse width modulation (PWM) control IC and MOSFET. Advantages: The conversion power is high, the volume is small, and it can be operated in a wide voltage range.


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