1.Power adapters are different from switching power supplies in their specifications, shape, size, precision density, performance , other parameters and their applications . The power adapter is mainly used for small electrical appliances and electronics, and the switching power supply is the conversion current device that controls the entire switch, which is suitable for all electronic devices.

     2.The characteristics of the switching power supply: it is to use the circuit to control the switching tube for high-speed channel pass and cut-off, and convert the direct current into high frequency alternating current to provide the transformer for transformer, thus generating the required group or group of voltages. The reason for conversion to high frequency AC is that the efficiency of high frequency AC in transformer transformer circuit is much higher than 50HZ, so the switching transformer can do very small, and the work is not very hot, the cost is very low, if you do not turn 50HZ into high frequency that switching power supply is meaningless.

3.Power adapter manufacturers produce power converters (both AC to DC), mostly converted from alternating current to direct current, and then through the computer, it is not able to protect the computer, but the computer inside the storage power storage (also known as the charger), so when the power failure can protect the computer.

4.The switching power supply and adapter are switching power supplies, which are composed of high frequency switching tubes and their control circuits. The adapter power supply is a voltage regulator switching power supply, the switching power supply charger has a floating charge function, the voltage is smaller and larger with the current, to the end is only voltage without current.