Power delivery system with surge handling capability
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United States of America Patent
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Dec 10, 2013
Grant Date -
Mar 31, 2011
app pub date -
Aug 31, 2010
filing date -
Aug 31, 2009
priority date (Note) -
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Abstract
A sensing circuit senses a load current to generate a sensed signal. A comparator's output is set to a first value if the sensed signal is equal to or greater than a reference signal, and to a second value if the sensed signal is smaller than the reference signal. A one-shot timer generates a logic signal that transitions from a first state to a second state in response to a first occurrence of the first value of the comparator's output, or optionally in response to each subsequent occurrence of the first value of the comparator's output if the one-shot timer is rearmed. A selector sets a first limit for the current delivered to the load in response to the first state of the logic signal, and a second limit for the current delivered to the load in response to the second state of the logic signal.
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