A mobile phone charger is a device that converts power current into a safe voltage and current to charge mobile devices. It converts high voltage AC power into low voltage DC power by using electronic components such as transformers and rectifiers to charge mobile phones. Mobile phone chargers typically use AC power as input, as most houses and buildings can provide AC power to them.
The transformer of the charger can convert high voltage AC power into lower voltage AC power. At this point, it is necessary to make changes to the current, reduce the magnitude of the current, and increase the magnitude of the voltage. Next, the rectifier will convert the AC power supply into DC power supply, facilitating the connection between the power supply and the battery.
Rectifying bridge rectangular circuit is a method of converting AC to DC. The rectifier bridge consists of four transistors and four diodes, which can cause current to flow in one direction and prevent it from flowing backwards. When the charger is connected to the power supply, the rectifier will convert the AC power supply into DC power supply and then transmit it to the battery of the charging device.
Finally, the charger can also include a voltage regulator to ensure the stability of current and voltage at different stages of charging, and to prevent damage to the charging equipment. The voltage regulator may also include an overcharge protection circuit to avoid overcharging and extend the service life of the charging device.
Overall, the working principle of a mobile phone charger is to convert a high-voltage AC power source into a low-voltage DC power source, and protect the device by stabilizing the current, making mobile phone charging more convenient.
