LED light strip factory switching power supply introduction and testing points
LED strip lights, LED flexible light strip switching power supplies are generally composed of LED diodes, IGBTs and MOSFETs. It uses the circuit to control the switch tube to perform high-speed on and off, and converts direct current into high-frequency alternating current to transform the converter, so that it can generate one or more sets of voltages required. The switching power supply can be roughly divided into two types: isolation and non-isolation. The isolated type must have a switching power converter, and the non-isolated one may not necessarily have a switching power converter. Compared with the traditional DC power supply, the switching power supply has the advantages of small size, light weight, and high efficiency.
Three conditions for LED switching power supply:
1. Switch: Power electronic devices work in a switch state instead of a linear state;
2. High frequency: power electronic devices work at high frequency instead of low frequency close to the power frequency;
3. DC: The output of the switching power supply is DC instead of AC;
Main points of detection of switching power supply of LED flexible light strip factory:
The LED switching power supply has a circuit to control the switching tube and perform high-speed channel and cut-off. It is to convert direct current into high-frequency alternating current to transform the converter, so that it can generate one or more sets of voltages required! 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 made small in size, and 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. A switching power supply doesn't make any sense without turning 50Hz or 60Hz into high frequency electricity. The switching power supply can be roughly divided into two types: isolation and non-isolation. The isolated type must have a switching power converter, and the non-isolated one may not necessarily have a switching power converter. Compared with the traditional DC power supply, the switching power supply has the advantages of small size, light weight, and high efficiency.
The following tests need to be performed: 1. Output voltage ripple detection; 2. Switching power supply efficiency detection; 3. If power factor is required, also do power factor detection; Detection and full load power supply temperature detection.
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