A control circuit for controlling a bleeder module with fixed bleed time, the control circuit comprising: a detection module , being connectable to an output of a rectifier, and configured to obtain and transmit a trigger signal; a timing module , in connection with the detection module , and configured to start timing upon receiving the trigger signal, and to output an end-of-timing signal when a preset time is reached; a control module , in connection with the timing module , and configured to output a control signal after receiving the end-of-timing signal; and the bleeder module , in connection with the control module , and configured to bleed off a current within the preset time according to the control signal, characterized in that , the bleeder module comprises a switch (SW1), a second switch (Q2), a third operational amplifier (COMP3) and a fourth resistor (R4), and wherein a controlled end of the switch (SW1) is connected with the control module , a first end of the switch (SW1) is grounded via a sixth resistor (R6) and a fifth resistor (R5), a second end of the switch (SW1) is connected in common with an inverting input of the third operational amplifier (COMP3), and an output end of the second switch (Q2), a non-inverting input of the third operational amplifier (COMP3) is connected with a second reference voltage signal (Vref2), and an output of the third operational amplifier (COMP3) is connected to a controlled end of the second switch (Q2), an input end of the second switch (Q2) is connected with a first end of the fourth resistor (R4), and a second end of the fourth resistor (R4) is connectable to a light emitting diode (LED) via a first diode (D1). a detection module , being connectable to an output of a rectifier, and configured to obtain and transmit a trigger signal; a timing module , in connection with the detection module , and configured to start timing upon receiving the trigger signal, and to output an end-of-timing signal when a preset time is reached; a control module , in connection with the timing module , and configured to output a control signal after receiving the end-of-timing signal; and the bleeder module , in connection with the control module , and configured to bleed off a current within the preset time according to the control signal, characterized in that , the bleeder module comprises a switch (SW1), a second switch (Q2), a third operational amplifier (COMP3) and a fourth resistor (R4), and wherein a controlled end of the switch (SW1) is connected with the control module , a first end of the switch (SW1) is grounded via a sixth resistor (R6) and a fifth resistor (R5), a second end of the switch (SW1) is connected in common with an inverting input of the third operational amplifier (COMP3), and an output end of the second switch (Q2), a non-inverting input of the third operational amplifier (COMP3) is connected with a second reference voltage signal (Vref2), and an output of the third operational amplifier (COMP3) is connected to a controlled end of the second switch (Q2), an input end of the second switch (Q2) is connected with a first end of the fourth resistor (R4), and a second end of the fourth resistor (R4) is connectable to a light emitting diode (LED) via a first diode (D1). <EOS>