What is the switching power supply?
A new type of power supply designed by the semiconductor device to turn on and off two extreme states corresponds to a linear power supply. Such as mobile phone charger, its efficiency is generally more than twice the linear power supply.
Distinguish between two kinds of power: switching power supply is very small and very light, there is a very small transformer, and linear power is relatively heavy, the transformer is a major part of the power supply.
Is a very complicated technology, very promising.
"Switch-type power supply" and "tandem-regulated power supply" compared to energy efficient; to adapt to the power of change; strong output voltage adjustable range; a switch can easily get multiple sets of different voltage levels Power supply; small size, light weight and many other advantages, and was widely adopted.
Switching power supply is a voltage conversion power supply circuit, the main component is a transformer and a function as a "on and off" transistors, transformers and transistors in series in the circuit, the DC through the transistor "on and off" state in the The pulse voltage on the circuit in the transformer core to form an instantaneous change in the magnetic field, and then in the same magnetic field in another coil to induce the pulse voltage, the pulse voltage through the rectifier and filter, is the output of the DC voltage, the regulator part is provided by the output voltage to control the transistor on and off the time and amplitude, to achieve the purpose of regulation.
