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LED driving power supply is a power converter that converts power supply into specific voltage and current to drive LED lighting. Generally, the input of LED driving power supply includes high-voltage power frequency AC (i.e. mains power), low-voltage DC, high-voltage DC, low-voltage high-frequency AC (such as the output of electronic transformer), etc. Safety capacitors are widely used in LED drive power supply, smart socket power supply, stage lighting power supply, medical equipment power supply, switched capacitor board, brushless motor board and other industries.