Introduction to the application of switch power supplies

A switch power supply is a type of power supply that uses modern power electronics technology to control the on and off time ratio of switching transistors, maintaining a stable output voltage. A switch power supply generally consists of a pulse width modulation (PWM) control IC and switching devices (such as MOSFETs, BJTs, etc.). Compared to linear power supplies, both types have costs that increase with output power, but the rate of increase differs. At a certain output power point, the cost of linear power supplies is actually higher than that of switch power supplies. With the development of power electronics technology and **, the technology of switch power supplies is continuously **, and this cost reversal point is increasingly moving towards the low output power end, providing a broad development space for switch power supplies. The trend towards high frequency is a direction for the development of switch power supplies, as high frequency allows for miniaturization and enables switch power supplies to enter a wider range of application fields, especially in high-tech areas, promoting the miniaturization and lightweight of high-tech products. Additionally, the development and application of switch power supplies are significant for energy conservation, resource saving, and environmental protection. Switch power supply products are widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communication equipment, power equipment, instruments, medical devices, semiconductor cooling and heating, air purifiers, industrial automation, LED displays, electronic refrigerators, LCD displays, LED lamps, communication devices, audiovisual products, security monitoring, computer cases, digital products, and instruments, among other fields.