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The working principle of power supply adapter

The working principle of power supply adapter

  • Author:
  • Origin:
  • Time of issue:2021-12-23
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(Summary description)Power supply adapter manufacturers believe that mobile phone chargers (also called mobile phone adapters) consist of a stable power supply (mainly a regulated power supply that provides stable working voltage and sufficient current) and necessary control circuits such as constant current, voltage limit, and time limit.

The working principle of power supply adapter

  • Author:
  • Origin:
  • Time of issue:2021-12-23
  • Views:

(Summary description)Power supply adapter manufacturers believe that mobile phone chargers (also called mobile phone adapters) consist of a stable power supply (mainly a regulated power supply that provides stable working voltage and sufficient current) and necessary control circuits such as constant current, voltage limit, and time limit.

Information

Power supply adapter manufacturers believe that mobile phone chargers (also called mobile phone adapters) consist of a stable power supply (mainly a regulated power supply that provides stable working voltage and sufficient current) and necessary control circuits such as constant current, voltage limit, and time limit. The mobile phone lithium-ion battery charger adopts a constant current and voltage limiting charging system. The charging current is generally around C2, which is a two-hour charging rate. For example, a 500 mAh battery is charged at 250 mAh, and then charged at a constant voltage after reaching 4.2V in about two hours.

power supply adapter

The power supply adapter manufacturer believes that one of the problems with the traditional power supply adapter is that the transformer is large, and electrical energy is converted into magnetic energy for transmission. In order to transmit enough electric energy, more turns are needed to generate enough magnetic energy to complete high-power voltage conversion. Therefore, the larger the required output current, the larger the size of the transformer. So why can the current chargers be so small?

The power supply adapter manufacturers believe that the mobile phone charger uses a switching power supply, and it also has a transformer, so why can this transformer be so much smaller than the traditional transformer? This is because the switching power supply can meet the power requirements while keeping the transformer small by increasing the frequency of the alternating current on the transformer, which meets the requirements of modern electronic equipment.

Therefore, the current mobile phone power supply adapter still has a transformer. The difference is a high-frequency transformer. The same is that the output terminal is electromagnetically isolated from the 220V electricity. The charger itself has no technical content, and the limiting factor is cost. The current fake standard is almost a common problem with all counterfeit chargers. You don't need to buy the original charger, you must buy it from a regular manufacturer. The current output of ordinary mobile phones exceeds 1A, and the current output of tablet computers such as iPad exceeds 2A. High-current chargers can be used on low-current devices, so the 2A charger for iPad can charge 1A iPhones and other mobile phones.

Some people are used to plug the power supply adapter into the socket all the time, so you can take it as you want, but have you ever wondered how much electricity will be consumed if the charger is plugged into the socket all day?

First of all, we need to know that the transformer has the function of changing the voltage. Power supply adapter manufacturers believe that transformers convert high voltage to low voltage, and then send it to the electrical appliance, that is, your mobile phone. The transformer principle of the charger is electromagnetic induction. A coil in the transformer will be connected to the power supply. When the current passes through, it will generate a magnetic field to generate alternating current of different voltages. Through the process of the rectifier circuit, it is converted into direct current to charge the mobile phone.

The power supply adapter manufacturer believes that the unplugged chargers of the unconnected electrical appliances are in the "no-load" state, and the power supply adapter will consume electricity because of the same current when it is no-load. Therefore, as long as the charger is not unplugged, a coil will continue to work, thereby consuming power.
 

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