Types and applications of switch mode power supplies
There are two kinds of modern switching power supply: one is DC switching power supply; the other is AC switching power supply. The main introduction here is only DC switching power supply, whose function is to convert the original power supply with poor quality of electricity (coarse power), such as utility power supply or battery power supply, into DC voltage (fine power) with higher quality to meet the requirements of equipment.
The core of a DC switching power supply is the DC/DC converter. Therefore, the classification of DC switching power supply is dependent on the classification of DC/DC converter. That is to say, the classification of DC switching power supply is basically the same as the classification of DC/DC converter, and the classification of DC/DC converter is basically the classification of DC switching power supply.
Switching power supply is the use of modern power electronics technology, control the switching transistor turn on and off time ratio, to maintain a stable output voltage of a power supply, switching power supply is generally by the pulse width modulation (PWM) control IC and switching devices (MOSFET, BJT, etc.) constitute the switching power supply high-frequency is the direction of its development, high-frequency switching power supply miniaturisation and switching power supply to enter a wider range of Application areas, especially in the field of high-tech applications, to promote the miniaturisation of high-tech products, lightweight.
