Led current pwm dimming module

A system for supplying direct current and brightness dimming function for light emitting diodes (LEDs) comprising:

• an LED driver power supply for supplying a constant direct current;
• a dimming controller comprising:
• a mechanical or electronic means for allowing a user to dim or select a light luminosity level;
• one or more LEDs;
• and
• an LED current PWM dimming module comprising:
• an input voltage regulator for regulating the constant direct current supplied by the LED driver power supply in order to maintain a fixed and stable supply voltage source to a first circuit and a direct current-to-direct current (DC-DC) buck converter;
• the first circuit for generating a repetitive square wave electrical output to be fed to the DC-DC buck converter;
• and
• the DC-DC buck converter for producing a driving pulse-width-modulated (PWM) current output to power the one or more LEDs from the repetitive square wave electrical output;
• wherein the first circuit receives a control signal from the dimming controller and adjusts the repetitive square wave electrical output frequency and duty cycle accordingly;
• and
• wherein the driving PWM current output frequency and duty cycle being varied in an open-loop manner.