Introduction to the Types and Application Directions of Switching Power Supplies
There are two types of modern switching power supplies: one is a DC switching power supply; Another type is AC switching power supply. The main introduction here is only the DC switching power supply, whose function is to convert the original ecological power supply (coarse electricity) with poor power quality, such as mains power or battery power supply, into a high-quality DC voltage (fine electricity) that meets the equipment requirements.
The core of a DC switching power supply is a DC/DC converter. Therefore, the classification of DC switching power supplies relies on the classification of DC/DC converters. That is to say, the classification of DC switching power supplies is basically the same as the classification of DC/DC converters, and the classification of DC/DC converters is basically the classification of DC switching power supplies.
Switching power supply is a type of power supply that utilizes modern power electronics technology to control the time ratio of switching transistors on and off, and maintain a stable output voltage. Switching power supply is generally composed of pulse width modulation (PWM) control IC and switching devices (MOSFET, BJT, etc.), and high-frequency switching power supply is its development direction. High frequency makes switching power supply miniaturized and enables switching power supply to enter a wider range of applications, Especially in the field of high-tech, the application has promoted the miniaturization and portability of high-tech products.
In addition, the development and application of switching power supplies are of great significance in energy conservation, resource conservation, and environmental protection. Especially in the application of high-tech fields, the development of switching power supplies has been promoted, with an annual growth rate of over two digits towards the direction of light, small, thin, low noise, high reliability, and anti-interference.
Compared to linear power supplies, the cost of both increases with the increase of output power, but their growth rates vary. The cost of linear power supply is actually higher than that of switching power supply at a certain output power point. With the development and innovation of power electronics technology, switching power supply technology is constantly innovating, and this cost reversal point is increasingly moving towards the low output power end, providing a wide range of development space for switching power supplies. High frequency switching power supply is the direction of its development.
