Boot chip refers to the power drive chip. It is mainly to generate PWM pulse to drive the power switch tube, control the switching tube's conduction and judgment, in order to achieve the purpose of constant current. Other functions such as over current protection, over voltage protection, over power protection, over temperature protection. It is common to say that the control power board converts the alternating current of the power grid into a constant current to drive the LED to emit stable light, and to protect some fault conditions that may occur in the work of the LED lamp.