发明名称 |
Overvoltage protection circuit. |
摘要 |
An overvoltage protection circuit protects a portable electronic device against overvoltage. The overvoltage protection circuit includes an input unit for receiving an input voltage supplied by a voltage source; a voltage-divider module for dividing the input voltage and outputting a divided voltage; a voltage-regulator module for comparing a comparison voltage with the divided voltage and generating a first control signal; a first switch unit being controllably switched by the first control signal to a short-circuit state or an open-circuit state and generating a second control signal; and a second switch unit being controllably switched by the second control signal to a circuit state reverse to that of the first switch unit, and stopping supplying the input voltage to the portable electronic device when the input voltage is no less than a rated voltage of the portable electronic device. Therefore, a temperature-independent overvoltage protection can be achieved.
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申请公布号 |
EP2575226(A2) |
申请公布日期 |
2013.04.03 |
申请号 |
EP20110192053 |
申请日期 |
2011.12.06 |
申请人 |
ASKEY TECHNOLOGY (JIANGSU) LTD.;ASKEY COMPUTER CORP. |
发明人 |
LU, CHUNG-MING;HSIEH, CHING-FENG |
分类号 |
H02H3/20 |
主分类号 |
H02H3/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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