Undervoltage protection circuit for LED lamp

An undervoltage protection circuit for an LED lamp comprises a DC/DC converter and a control circuit module, wherein the control circuit module comprises a signal acquisition unit, a signal comparison unit and a signal processing unit, the signal acquisition unit is used for acquiring an input signal, the signal comparison unit is electrically connected with the signal acquisition unit, the signal processing unit is electrically connected with the signal comparison unit, the signal comparison unit is used for comparing an input signal of the signal acquisition unit with a preset value, and the signal processing unit is used for processing an output signal of the signal comparison unit so as to control on/off of the DC/DC converter. The control circuit module is used for processing and controlling an input voltage; when the input voltage is smaller than a threshold voltage, an output voltage of the control circuit module is a high level, and the DC/DC converter does not work; and when the input voltage is larger than the threshold value, a load begins to work, so that the purpose of undervoltage protection is achieved, the whole circuit and the lamp can conform to safety requirement.