How the power adapter works

I believe everyone is familiar with power adapters. Laptop computers are inseparable from the use of power adapters, because power adapters charge and power electronic devices such as laptop computers, but many people do not know how the power adapter works. The following will be explained in detail by everyone:

Working principle of power adapter:

The working principle of the power adapter is to use the principle of switching power supply to convert the unstable power supply into the constant voltage DC power required by the laptop computer through the conversion circuit to power and charge the laptop computer. This conversion circuit must have a protection circuit.

The working principle of the power adapter can be used to know why the power adapter is easy to generate heat during operation, so pay attention to ventilation and heat protection when using it to protect the power adapter.

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 controls the time ratio of switching on and off by a modern electronic technology to maintain a stable output voltage. The switching power supply of a power adapter is generally composed of a pulse width modulation (PWM) control IC and MOSFET.

Power adapter is the principle of using unstable power supply by switching power supply, through the conversion circuit into the constant voltage direct current required by the consumer, to power and charge the consumer. This conversion circuit must have a protection circuit (overcurrent protection circuit, overvoltage protection circuit, short-circuit protection circuit, etc.) to prevent the electrical appliances from being burned out in case of accidents.

Both the switching power supply and the adapter are switching power supplies, which are composed of high-frequency switch tubes and their control circuits. The adapter power supply is a regulated switching power supply. The switching power supply charger is equipped with a floating charge function. The voltage becomes larger as the current becomes smaller. In the end, there is only voltage but no current.

The working principle of the power adapter is shared here. The power adapter is actually a high-precision and high-efficiency switching power supply. Its function is to convert 220V AC mains power into low-voltage DC power to provide stable power for normal operation of electronic equipment. . Earlier we also talked about the use of power adapters? Everyone can take a look together.

Best regards,

Mandy Huang