Disclosed is a control circuit of an LED lighting apparatus which is capable of improving power efficiency. The control circuit controls light emission of one or more LED groups in response to changes of a rectified voltage, and includes a current source configured to provide a primary current using a driving current outputted through a current path of a driver and a secondary current using a rectified current provided to a plurality of LED groups. Thus, the control circuit can perform a charging operation using a current provided from the current source, and provide a charge voltage to an additional device.