Transient blocking unit
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United States of America Patent
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Issued Date -
Feb 15, 2007
app pub date -
Aug 10, 2006
filing date -
Aug 11, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Improved electrical transient blocking is provided with a transient blocking unit (TBU) having a partial disconnect capability. A TBU is an arrangement of voltage controlled switches that normally conducts, but switches to a disconnected state in response to an above-threshold input transient. Partial disconnection improves the power handling capability of a TBU by preventing thermal damage to the TBU. Partial TBU disconnection can be implemented to keep power dissipation in the TBU below a predetermined level P.sub.max, thereby avoiding thermal damage to the TBU by keeping the TBU temperature below a temperature limit T.sub.max. Alternatively, partial TBU disconnection can be implemented to keep TBU temperature below T.sub.max using direct temperature sensing and feedback.
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