Hubbell Incorporated
Light emitting diode thermal foldback control device and method

Abstract:

A thermal foldback control system electrically connected to a light emitting diode (LED) driver. The thermal foldback control system including a temperature sensitive circuit and a shunt regulator. The temperature sensitive circuit includes first and second resistances that vary in response to a temperature at a reference point. Wherein the temperature sensitive circuit outputs a reference voltage based on the first and second resistances. The shunt regulator is configured to control a driver output of the LED driver based on the reference voltage.