Bleeder circuit for use in a power supply

A bleeder circuit for use in a power supply of a lighting system, comprising:

• a first terminal to be coupled to a first input of the power supply;
• a second terminal to be coupled to a second input of the power supply;
• a first edge detection circuit coupled between the first and second terminals of the bleeder circuit, the first edge detection coupled to output a first edge detection signal in response to an input signal between the first and second inputs of the power supply having a first polarity;
• a first variable current circuit coupled to the first edge detection circuit and coupled between the first and second terminals of the bleeder circuit, the first variable current circuit coupled to conduct a first bleeder current in a first direction between the first and second terminals of the bleeder circuit in response to the first edge detection signal;
• a second edge detection circuit coupled between the first and second terminals of the bleeder circuit, the second edge detection coupled to output a second edge detection signal in response to the input signal between the first and second inputs of the power supply having a second polarity;
• and
• a second variable current circuit coupled to the second edge detection circuit and coupled between the first and second terminals of the bleeder circuit, the second variable current circuit coupled to conduct a second bleeder current in a second direction between the first and second terminals of the bleeder circuit in response to the second edge detection signal.

A power supply for use in a lighting system, comprising:

• first and second inputs coupled to receive an input signal;
• a driver circuit coupled to receive the input signal from the first and second inputs to drive a load coupled to an output of the driver circuit;
• and
• a bleeder circuit coupled between the first and second inputs and to the driver circuit, the bleeder circuit comprising:
• first and second terminals coupled to receive the input signal from the first and second inputs of the power supply;
• an edge detection circuit coupled between the first and second terminals of the bleeder circuit, the edge detection circuit coupled to output an edge detection signal in response to the input signal between the first and second inputs;
• and
• a variable current circuit coupled to the edge detection circuit and coupled between the first and second terminals of the bleeder circuit, the variable current circuit coupled to conduct a bleeder current between the first and second terminals of the bleeder circuit in response to the edge detection signal.