A control circuit, comprising a control unit and a feedback unit, wherein the feedback unit is configured to output a feedback signal according to a voltage of the control unit and a reference voltage; wherein a first terminal of the feedback unit is connected to a first terminal of the control unit, a second terminal of the feedback unit serves as an input terminal of the reference voltage, and an output terminal of the feedback unit is connected to a second terminal of the control unit; the control unit is configured to adjust a voltage of the second terminal of the control unit according to the feedback signal, so as to allow a current variation of the control unit with a first parameter to be within a first range; wherein the first parameter comprises at least one of a manufacturing process of the control circuit, a power supply voltage of the control circuit, or an operating temperature of the control circuit; wherein a third terminal of the control unit is connected to a first power supply terminal, and a fourth terminal of the control unit is connected to a negative power supply terminal, or, the third terminal of the control unit is connected to a second power supply terminal, and the fourth terminal of the control unit is connected to a ground terminal; and characterized in that, when the third terminal of the control unit is connected to the first power supply terminal and the fourth terminal of the control unit is connected to the negative power supply terminal, the control unit comprises an inverter and a constant-current source; wherein a first terminal of the inverter is connected to the first power supply terminal; a first terminal of the constant-current source is connected to a second terminal of the inverter, and a second terminal of the constant-current source is connected to the negative power supply terminal; and an input terminal of the inverter is short connected with an output terminal of the inverter; or, when the third terminal of the control unit is connected to the second power supply terminal and the fourth terminal of the control unit is connected to the ground terminal, the control unit comprises an inverter and a constant-current source; wherein a first terminal of the inverter is connected to the ground terminal; a first terminal of the constant-current source is connected to a second terminal of the inverter, and a second terminal of the constant-current source is connected to the second power supply terminal; and an input terminal of the inverter is short connected with an output terminal of the inverter. the feedback unit is configured to output a feedback signal according to a voltage of the control unit and a reference voltage; wherein a first terminal of the feedback unit is connected to a first terminal of the control unit, a second terminal of the feedback unit serves as an input terminal of the reference voltage, and an output terminal of the feedback unit is connected to a second terminal of the control unit; the control unit is configured to adjust a voltage of the second terminal of the control unit according to the feedback signal, so as to allow a current variation of the control unit with a first parameter to be within a first range; wherein the first parameter comprises at least one of a manufacturing process of the control circuit, a power supply voltage of the control circuit, or an operating temperature of the control circuit; wherein a third terminal of the control unit is connected to a first power supply terminal, and a fourth terminal of the control unit is connected to a negative power supply terminal, or, the third terminal of the control unit is connected to a second power supply terminal, and the fourth terminal of the control unit is connected to a ground terminal; and characterized in that, when the third terminal of the control unit is connected to the first power supply terminal and the fourth terminal of the control unit is connected to the negative power supply terminal, the control unit comprises an inverter and a constant-current source; wherein a first terminal of the inverter is connected to the first power supply terminal; a first terminal of the constant-current source is connected to a second terminal of the inverter, and a second terminal of the constant-current source is connected to the negative power supply terminal; and an input terminal of the inverter is short connected with an output terminal of the inverter; or, when the third terminal of the control unit is connected to the second power supply terminal and the fourth terminal of the control unit is connected to the ground terminal, the control unit comprises an inverter and a constant-current source; wherein a first terminal of the inverter is connected to the ground terminal; a first terminal of the constant-current source is connected to a second terminal of the inverter, and a second terminal of the constant-current source is connected to the second power supply terminal; and an input terminal of the inverter is short connected with an output terminal of the inverter.