A circuit comprising a power supply, the power supply comprising: a rectifier component, and an output energy storage component; the circuit further comprising: a power dissipating circuit; the power supply configured to supply an output voltage to a load; the power dissipating circuit comprising: a detector (210, 210A) coupled to an output of the rectifier component, configured to detect a signal at the output of the rectifier component and furthermore configured to detect a state of the power supply and to generate a control signal (CTRL) responsive to the state of the power supply; a dissipating component (230, Rload); and a switch configured to controllably couple the dissipating component (230, Rload) to the output energy storage component in response to the control signal output by the detector (210, 210A) indicating that the power supply is not actively generating the output voltage; characterized in that the detector (210, 210A) comprises a DC blocking capacitor at an input of the detector (210, 210A), connected to the output of the rectifier component of the power supply and configured to receive the output of the rectifier component. a rectifier component, and an output energy storage component; the circuit further comprising: a power dissipating circuit; the power supply configured to supply an output voltage to a load; the power dissipating circuit comprising: a detector (210, 210A) coupled to an output of the rectifier component, configured to detect a signal at the output of the rectifier component and furthermore configured to detect a state of the power supply and to generate a control signal (CTRL) responsive to the state of the power supply; a dissipating component (230, Rload); and a switch configured to controllably couple the dissipating component (230, Rload) to the output energy storage component in response to the control signal output by the detector (210, 210A) indicating that the power supply is not actively generating the output voltage; characterized in that the detector (210, 210A) comprises a DC blocking capacitor at an input of the detector (210, 210A), connected to the output of the rectifier component of the power supply and configured to receive the output of the rectifier component. a power dissipating circuit; the power supply configured to supply an output voltage to a load; the power dissipating circuit comprising: a detector (210, 210A) coupled to an output of the rectifier component, configured to detect a signal at the output of the rectifier component and furthermore configured to detect a state of the power supply and to generate a control signal (CTRL) responsive to the state of the power supply; a dissipating component (230, Rload); and a switch configured to controllably couple the dissipating component (230, Rload) to the output energy storage component in response to the control signal output by the detector (210, 210A) indicating that the power supply is not actively generating the output voltage; characterized in that the detector (210, 210A) comprises a DC blocking capacitor at an input of the detector (210, 210A), connected to the output of the rectifier component of the power supply and configured to receive the output of the rectifier component. a detector (210, 210A) coupled to an output of the rectifier component, configured to detect a signal at the output of the rectifier component and furthermore configured to detect a state of the power supply and to generate a control signal (CTRL) responsive to the state of the power supply; a dissipating component (230, Rload); and a switch configured to controllably couple the dissipating component (230, Rload) to the output energy storage component in response to the control signal output by the detector (210, 210A) indicating that the power supply is not actively generating the output voltage; characterized in that the detector (210, 210A) comprises a DC blocking capacitor at an input of the detector (210, 210A), connected to the output of the rectifier component of the power supply and configured to receive the output of the rectifier component.