Overview of LED power supply
The LED switching power supply converts direct current into high-frequency alternating current to transform the voltage of the converter, so that it can generate one or more sets of voltages required. The reason for converting to 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, it will not be very hot when the switching power supply is working, and the product price is lower than that of the power frequency DC regulated power supply. There's no point in switching a power supply without turning 50Hz or 60Hz into high frequency electricity. Switching power supplies can be roughly divided into two types: isolated and non-isolated. The isolated type must have a switching power converter, while the non-isolated type may not necessarily have a switching power converter. Compared with traditional DC power supplies, switching power supplies have the advantages of small size, light weight, and high efficiency.
The high frequency of LED switching power supply is the direction of its development. High frequency makes the switching power supply miniaturized, and makes the switching power supply enter a wider range of application fields, especially in the application of high-tech fields, which promotes the miniaturization of high-tech products, portability. In addition, the development and application of switching power supply 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 dedicated chip, the transformer and switching devices in the circuit generate a high-frequency square wave voltage, which outputs high-precision, High stable DC voltage.
Features of LED switching power supply
1. Small size and light weight.
2. Wide working voltage range: the input voltage can work normally within 170-264V.
3. Safety and high reliability.
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 well prevent the output of unstable high voltage at the moment of power supply, so as to prevent the load from being impacted by high voltage ( Especially the LED light source, which can minimize the light decay caused by the sudden change of the working voltage).
6. Easy installation: This product is designed to be rainproof (outdoor) and not rainproof (indoor). The rainproof power supply adopts a high-strength, anti-rust metal shell suspension structure design, which can be suspended and installed anywhere, reducing the connection wires for input and output.
7. When the load is too large, the power supply will be protected, and there will be an abnormal state of intermittent on-off. At this time, the load should be reduced.
