High performance dimming based on dimmer slew-rate

A power supply controller coupled to a power supply, the power supply controller comprising:

• a processor;
• and
• a processor memory local to the processor, wherein the processor memory has stored thereon instructions that, when executed by the processor, cause the processor to perform:
• receiving a plurality of pulse-width-modulated (PWM) pulses corresponding to one or more dimmer levels;
• generating a first sample value and a second sample value of a plurality of sample values corresponding to duty cycles of the plurality of PWM pulses;
• determining a rate of change of the one or more dimmer levels based on the first and second sample values;
• comparing the rate of change with a threshold value to identify a mode of operation of the power supply;
• and
• generating a control signal for transmission to the power supply based on the identified mode of operation.

A power supply system coupled to a dimmer and a light source, the power supply system comprising:

• a pulse-width-modulated (PWM) converter configured to receive a modified AC input signal from the dimmer, and to generate a PWM signal based on the modified AC input signal, the PWM signal comprising a plurality of PWM pulses;
• and
• a power supply controller is configured to perform:
• receiving a plurality of PWM pulses corresponding to one or more dimmer levels of the dimmer;
• generating a first sample value and a second sample value of a plurality of sample values corresponding to duty cycles of the plurality of PWM pulses;
• determining a rate of change of the one or more dimmer levels based on the first and second sample values;
• comparing the rate of change with a threshold value to identify a mode of operation of the power supply system;
• and
• generating a control signal based on the identified mode of operation.