Patent ID: 9130449
Filing Date: 2015-09-08
Classification: H02M

Abstract:
1. A low power consumption bleeder circuit, coupled to an alternating-current (AC) power source, an input filtering capacitor, and a rectifying filter, wherein the input filtering capacitor and the rectifying filter are coupled to a first input terminal and a second input terminal of the AC power source, the low power consumption bleeder circuit comprising: a first switch component, coupled to the first input terminal of the AC power source and a first connection terminal of the rectifying filter; a second switch component, coupled to the second input terminal of the AC power source and the first connection terminal of the rectifying filter; and a controller, when detecting that the AC power source is removed, controlling at least one of the first switch component and the second switch component to be conductive; wherein the controller includes: a first detection terminal and a second detection terminal which are connected with a first resistor and a second resistor, for detecting the first input terminal and the second input terminal of the AC power source to determine whether the AC power source is removed or not; wherein the controller includes: a first current controller, connected with the first resistor and a control terminal of the first switch component; a first diode, connected with the control terminal of the first switch component and the first input terminal of the AC power source; a first capacitor, connected with the control terminal of the first switch component and the first connection terminal of the rectifying filter; a second current controller, connected with the second resistor and a control terminal of the second switch component; a second diode, connected with the control terminal of the second switch component and the second input terminal of the AC power source; and a second capacitor, connected with the control terminal of the second switch component and the first connection terminal of the rectifying filter.