Invention Grant
- Patent Title: Control circuit and method of a power converter
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Application No.: US14695761Application Date: 2015-04-24
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Publication No.: US09654011B2Publication Date: 2017-05-16
- Inventor: Isaac Y. Chen
- Applicant: Richtek Technology Corporation
- Applicant Address: TW Zhubei, Hsinchu County
- Assignee: RICHTEK TECHNOLOGY CORP.
- Current Assignee: RICHTEK TECHNOLOGY CORP.
- Current Assignee Address: TW Zhubei, Hsinchu County
- Agency: Muncy, Geissler, Olds & Lowe, P.C.
- Main IPC: H02M3/335
- IPC: H02M3/335 ; H02M1/00 ; H02M1/32

Abstract:
A feedback signal stabilized by a capacitor and related to an output voltage of a power converter is used to acquire the output power information of the power converter, and a control circuit uses a second clock not related to the switching frequency of the power converter to count a duration time of the feedback signal being higher than a threshold. When the duration time is higher than a preset time, an abnormal output power of the power converter is distinguished and the power converter will be turned off. The feedback signal will not vary severely even if the output terminal of the power converter is interfered, and the counted duration time will not be influenced when the switching frequency is changing caused by a load changing.
Public/Granted literature
- US20160315541A1 CONTROL CIRCUIT AND METHOD OF A POWER CONVERTER Public/Granted day:2016-10-27
Information query
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