Classification of power adapters: There are two main types of power adapters,Adapter switching power supplies and linear power supplies. Switching power supply is a kind of power supply that uses modern electronic technology to control the time ratio of switching on and off 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. Advantages: high work efficiency, small size,Adapter and can work in a wide voltage range. Disadvantages: Great interference to the power circuit,Adapter difficult to repair when a fault occurs.
The linear power supply transforms AC power through a transformer,Adapter and the rectifier circuit rectifies and filters to obtain an unstable DC voltage. To achieve a high-precision DC voltage for the power adapter,Adapter the output voltage must be adjusted through a voltage feedback circuit. Advantages: This kind of power supply technology is mature,Adapter the circuit is simple, and there is no interference and noise that the switching power supply has. Disadvantages: The voltage feedback circuit works in a linear state,Adapter the power consumption of the regulator tube is large,Adapter the conversion efficiency is low,Adapter and the weight of the equipment is heavy due to the use of an inductive transformer.