Light driver capable of deactivating CCT control in the presence of TRIAC dimming

A lighting system comprising:

• a rectifier configured to receive a phase-cut input line voltage from a phase-cut dimmer at an input of the rectifier and configured to generate a rectified input line voltage;
• and
• a light driver configured to drive a light source, and comprising:
• a phase-cut detector configured to determine whether phase-cut dimming is present at an input of the light driver based on the rectified input line voltage and to generate a phase-cut detection signal in response to presence of the phase-cut dimming;
• and
• a channel controller coupled to the phase-cut detector and configured to perform:
• receiving a current correlated color temperature (CCT) value and a dimmer level for adjusting an intensity and a CCT of an output light of the light source;
• and
• in response to receiving the phase-cut detection signal from the phase-cut detector,
• disregarding the CCT value and the dimmer level by maintaining a fixed CCT at the output light and adjusting an intensity of the output light based on a level of phase-cutting at the input of the light driver,
• wherein the fixed CCT corresponds to a previously received CCT value, and the previously received CCT value is different from the current CCT value.

A method of driving a light source by a light driver, the method comprising:

• receiving a current correlated color temperature (CCT) value for adjusting a CCT of an output light of the light source;
• determining whether phase-cut dimming is present at an input of the light driver;
• and
• in response to determining that the phase-cut dimming is present at the input, disregarding the current CCT value by maintaining a fixed CCT at the output light and adjusting an intensity of the output light based on a level of phase-cutting at the input of the light driver,
• wherein the fixed CCT corresponds to a previously received CCT value, and the previously received CCT value is different from the current CCT value.