Over-voltage protected battery charger with bypass
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United States of America Patent
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Mar 8, 2011
Grant Date -
Jan 8, 2009
app pub date -
Oct 31, 2007
filing date -
Jul 3, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A battery charger comprises charging circuitry for providing a battery charging voltage responsive to an input voltage. First circuitry provides both over-voltage protection and an input voltage bypass signal responsive to the input voltage. The first circuitry includes a low impedance switch having a resistance of at least 500 mΩ for connecting the input voltage to an output voltage node. The first circuit also includes a higher impedance switch having a resistance of at least 1000 mΩ for providing the input voltage as a voltage bypass signal.
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