Charge controller with protective function and battery pack
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United States of America Patent
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-
Dec 29, 2015
Grant Date -
Aug 8, 2013
app pub date -
Jan 23, 2013
filing date -
Jan 23, 2013
priority date (Note) -
Withdrawn
status (Latency Note)
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Abstract
A charge controller includes a charge control circuit that, when detecting that a charging power supply is connected, controls the charging transistor to apply the charge current; a first and second control switch element connected in series between one terminal of a secondary battery and an external terminal; and a protection circuit that, when the secondary battery is over-discharged, turns off the first control switch element to stop discharge current and when deeply discharged, turns off the second control switch element. The protection circuit sends a charge inhibit signal to the charge control circuit when the secondary battery is deeply discharged, and while receiving the charge inhibit signal, the charge control circuit keeps the charging transistor off to prevent the charge current from flowing even if detecting that the charging power supply is connected.
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