Dimming control power supply for LED lamps

A dimming control power supply for LED lamps, comprising:

• a first secondary power supply module,
• an output control module powered by the first secondary power supply module,
• a PWM signal receiving module for controlling output current of the output control module, and
• a control signal converting module electrically connected between the PWM signal receiving module and the output control module, the output control module configured to adjust the output current according to a received constant DC voltage signal with a variable amplitude, the control signal converting module comprises a buck filter circuit electrically connected to an output terminal of the first secondary power supply module;
• a voltage division circuit electrically connected with the buck filter circuit, and a filter circuit electrically connected between the voltage division circuit and the output control module;
• the control signal converting module configured to convert the PWM signal received by the PWM signal receiving module into the constant DC voltage signal with the variable amplitude;
• the output control module configured to adjust the output current according to the constant DC voltage signal with a variable amplitude to adjust brightness of the LED lamps.