Overview and principle introduction of LED switching power supply
LED switching power supply is a new type of switching power supply controlled by pulse width modulation (PWM) technology, which uses circuits to control the switching tubes for high-speed on/off. The electronic components used in LED switching power supplies mainly include LED diodes, IGBTs, and MOSFETs.
Overview of LED Switching Power Supply
LED switching power supply converts direct current into high-frequency alternating current to transform the transformer and generate one or more sets of required voltages. The reason for converting to high-frequency alternating current is that the efficiency of high-frequency alternating current in transformer circuits is higher than that of mains 50Hz or 60Hz. Therefore, switch mode power supply transformers can be made very small in size, and will not be very hot when the switch mode power supply is working. The product price is lower than that of power frequency DC stabilized power supplies. If 50Hz or 60Hz is not converted into high-frequency electricity, then the switch mode power supply has no meaning. Switching power supplies can generally be divided into two types: isolated and non isolated. For isolated types, there must be a switching power converter, while for non isolated types, there may not necessarily be a switching power converter. Compared with traditional DC power supplies, switch mode power supplies have the advantages of small size, light weight, and high efficiency.
The high-frequency development of LED switching power supplies is the direction of their development. High frequency technology enables the miniaturization of switching power supplies and enables them to enter a wider range of application fields, especially in high-tech fields, promoting the miniaturization and lightweight of high-tech products. In addition, the development and application of switch mode power supplies are of great significance in energy conservation, resource conservation, and environmental protection.
The principle of LED switch power supply
The AC voltage input to the LED switch power supply is rectified and filtered to generate a DC voltage of about 300V. Under the control of a dedicated chip, the transformer and switching devices in the circuit generate high-frequency square wave voltage, which is then output as high-precision and highly stable DC voltage through a high-power rectifier tube.
