1. Characteristics:

The characteristics of the power adapter are: the power converter (i.e. AC to DC), which is converted from AC to DC, and then passes through the computer. It can not protect the computer, but there is a storage (also known as charger) for storing power in the computer, so it can protect the computer in case of power failure.

The characteristics of switching power supply are: high speed on and off with circuit operated switch tube Convert direct current into high-frequency alternating current, provide it to the transformer for voltage transformation, and then generate one or more groups of required voltages! The reason for switching to Huawei high frequency AC is that the power of high frequency AC in transformer voltage transformation circuit is much higher than 50Hz So the switch transformer can do very small, and the operation is not very hot!! The cost is very low If 50Hz is not changed into high frequency, the switching power supply is meaningless.

Both switching power supply and adapter are switching power supply, which are composed of high-frequency switching tube and its control circuit. The power adapter is a regulated switching power supply. The switching power supply has the function of floating charge. The voltage increases with the decrease of the current. In the end, it only needs the voltage and no current.

2. Difference:

Switching power supply is a large category. The power adapter belongs to 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 power supply that controls the time ratio of switching tube registration and off through modern electronic technology to maintain a stable output voltage. The switching power supply of power adapter is generally composed of pulse width modulation (PWM) control IC and MOSFET. Its advantages are high conversion power, small volume and can operate in a wide voltage range.