Invention Grant
- Patent Title: Start-up circuitry and method for power converter
- Patent Title (中): 电源转换器的启动电路和方法
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Application No.: US12182915Application Date: 2008-07-30
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Publication No.: US08129959B1Publication Date: 2012-03-06
- Inventor: Laszlo Balogh
- Applicant: Laszlo Balogh
- Applicant Address: US ME South Portland
- Assignee: Fairchild Semiconductor Corporation
- Current Assignee: Fairchild Semiconductor Corporation
- Current Assignee Address: US ME South Portland
- Agency: Sidley Austin LLP
- Main IPC: G05F1/10
- IPC: G05F1/10

Abstract:
In one embodiment, circuitry is provided for startup of a power converter. The circuitry includes a bias capacitor operable to be charged for providing energy to a controller of the power converter. A divider circuit is coupled to a voltage source. Current flows through the divider circuit. A switch, coupled to the divider circuit, is operable to be turned on and off to divert current flow in the divider circuit for charging the bias capacitor. This provides energy to the controller of the power converter at startup without employing an external bias source or high value bleeder resistor.
Information query
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