Power adapter is different from switching power supply. Their specifications, shape, size, precision density, performance and other parameters are different, and their applications are also different. The power adapter is mainly suitable for small electrical appliances and electronics, and the switching power supply is the conversion current equipment that controls the whole switch, which is suitable for all electronic equipment.
Characteristics of power adapter and switching power supply
Characteristics of switching power supply:
It is to use the circuit to control the switch tube for high-speed channel on and off, convert the DC into high-frequency AC, and provide it to the transformer for voltage transformation, so as to produce one or more groups of voltages. The reason why it is converted to high-frequency AC is that the efficiency of high-frequency AC in transformer voltage transformation circuit is much higher than 50Hz, so the switching transformer can do very little, and the work is not very hot and the cost is very low. If 50Hz is not changed to high-frequency, the switching power supply will be meaningless.
Characteristics of power adapter:
Power adapter manufacturers produce power converters (i.e. AC to DC). Most of them are converted from AC to DC, and then pass through the computer. It can not protect the computer, but there is a memory (also known as charger) for storing power in the computer, so it can protect the computer in case of power failure.
Both switching power supply and adapter are switching power supply, which are composed of high-frequency switching tube and its control circuit. The adapter power supply is a regulated switching power supply, and the switching power supply charger has floating charge function. The voltage increases with the decrease of current, and finally there is only voltage but no current.
