Driver power supply manufacturers talk about the main core components of led driver power supply

LED is a voltage converter that converts electrical energy into a specific voltage and current to drive LED lighting. Generally speaking, the input of LED power supply includes AC power, high-voltage DC, low-voltage DC, low-voltage and high-frequency AC, etc., and the output of LED power supply is mostly a constant current source, which can change the voltage and forward voltage drop of the LED. The main core components of LED driver power supply include inductor, switch controller, switching element, input filter, feedback resistor and output filter. According to the requirements of different occasions, input overvoltage protection circuit, input undervoltage protection circuit, LED open circuit protection and overcurrent protection circuit are also needed. The power supply manufacturer stated that the internal solder joints of the power supply should be full and shiny, without abnormal phenomena such as cold solder joints, cold solder joints, leaking solder joints, and insufficient tin. The height of the solder joints should be 1.2 mm, the inside of the component should be bright, the component feet should be free of oxidation, the component surface should be free of pollution, and the soldering tin must be above 50%. In addition to meeting safety requirements, LED driver power supply should also have two other basic functions: one is to maintain constant current characteristics as much as possible, especially when the power supply voltage changes by 15%, the output current should still change within 10%. The main reasons are: 1. Avoid driving current exceeding the maximum rated value, which will affect its reliability. 2. Obtain the expected brightness requirements and ensure the consistency of brightness and chromaticity of each LED. Secondly, the LED drive circuit must maintain its own low power consumption to keep the LED system efficiency at a high level. The input circuit of high-quality switching power supplies mostly uses a capacitor filter rectifier circuit. At the moment the input power is turned off, since the initial voltage on the capacitor is zero, a large surge current will be formed at the moment the capacitor is charged. A large-capacity filter capacitor can make the surge current reach more than 100A. The above is the explanation of the editor of the driver power manufacturer. If you want to know more, please contact the driver power manufacturer.