Overvoltage protection circuit, and power source, power supply system and electronic apparatus using the overvoltage protection circuit
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United States of America Patent
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Apr 8, 2008
Grant Date -
Apr 14, 2005
app pub date -
Sep 8, 2004
filing date -
Sep 8, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a redundant configuration with multiple power sources connected in parallel to enhance reliability, a power source in which an overvoltage failure occurred has been difficult to identify and unable to be deactivated, which has impeded the improvement of reliability. However, it has become possible to deactivate selectively only the power source in which an overvoltage failure has occurred, by providing a independency-discrimination circuit that identifies the occurrence of the overvoltage failure by use of the state of a parallel operation control circuit, and connecting the independency-discrimination circuit, an overvoltage detection circuit, and a connection circuit.
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