Overview of LED switching power supply
The LED switching power supply converts direct current into high-frequency alternating current to transform the converter to generate one or more sets of required voltages. The reason for converting into high-frequency alternating current is that the efficiency of high-frequency alternating current in the transformer circuit is higher than that of the mains 50Hz or 60Hz. Therefore, the switching power supply transformer can be small in size and will not be very hot when the switching power supply is working. The product price is lower than that of the industrial frequency DC regulated power supply. There is no point in switching a power supply without converting 50Hz or 60Hz into high frequency electricity. Switching power supplies can be roughly divided into two types: isolated and non-isolated. Those that are isolated must have switching power converters, while those that are not isolated may not necessarily have switching power converters. Compared with traditional DC power supplies, switching power supplies have the advantages of small size, light weight, and high efficiency.
High frequency of LED switching power supply is the direction of its development. High frequency makes the switching power supply miniaturized and allows the switching power supply to enter a wider range of application fields, especially in the high-tech field. It promotes the miniaturization of high-tech products. Lightweight. In addition, the development and application of switching power supplies are of great significance in saving energy, saving resources and protecting the environment.
The principle of LED switching power supply
The AC voltage input to the LED switching power supply is rectified and filtered to produce a DC voltage of about 300V. Under the control of a special chip, the transformer and switching devices in the circuit generate a high-frequency square wave voltage, which is output after passing through the high-power rectifier tube with high precision. High stable DC voltage.
Characteristics of LED switching power supply
1. Small size and light weight.
2. Wide operating voltage range: the input voltage can work normally within 170-264V.
3. Safe and highly reliable.
4. Protection function: short circuit, overcurrent, overheating protection.
5. Excellent working performance: The high-power switching power supply has a 5-10 second delay detection circuit design, which can effectively prevent the power supply from outputting unstable high voltage when it is powered on, thus preventing the load from being impacted by high voltage ( In particular, LED light sources can minimize light decay caused by sudden changes in operating voltage).
6. Easy to install: This product is designed to be rainproof (outdoor) or not rainproof (indoor). The rain-proof power supply adopts a high-strength, rust-proof metal shell suspension structure design, which can be suspended and installed anywhere, reducing input and output connecting wires.
7. When the load is too large, the power supply will be protected and an abnormal state of intermittent on and off will occur. At this time, the load should be reduced.
