Invention Grant
- Patent Title: Startup circuit for DC-DC converter
- Patent Title (中): DC-DC转换器启动电路
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Application No.: US12946158Application Date: 2010-11-15
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Publication No.: US08476878B2Publication Date: 2013-07-02
- Inventor: Siew K. Hoon , Mengzhe Ma
- Applicant: Siew K. Hoon , Mengzhe Ma
- Applicant Address: US CA Santa Clara
- Assignee: National Semiconductor Corporation
- Current Assignee: National Semiconductor Corporation
- Current Assignee Address: US CA Santa Clara
- Agent Wade J. Brady, III; Frederick J. Telecky, Jr.
- Main IPC: G05F1/59
- IPC: G05F1/59
Abstract:
A startup circuit for use in a DC-DC converter having an input voltage terminal and an output voltage terminal, with the output voltage terminal connected to an output capacitor and with said converter including a pass transistor for transferring charge from the input terminal to the output terminal. The startup circuit includes a control circuit configured to cause the pass transistor to conduct an output current during start up when the output terminal voltage is approaching a final regulated voltage, with the output current being comprised of first and second current components, with the first current component being proportional to the output voltage and the second current component being proportional to the input voltage, with the two components being combined so as to resist changes in the power dissipation in the pass transistor during startup.
Public/Granted literature
- US20120120688A1 STARTUP CIRCUIT FOR DC-DC CONVERTER Public/Granted day:2012-05-17
Information query
IPC分类:
