Charging and discharging control circuit and charging type...

Details Charging and discharging control circuit and charging type... Charging and discharging control circuit and charging type...

2011-04-19

2011-04-19

Tso, Edward (Department: 2858)

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

C320S135000, C320S136000

Reexamination Certificate

active

07928694

ABSTRACT:
An overcharge detecting comparator (121) detects an overcharged state of a battery (101), and an overcurrent detecting comparator (120) detects an overcurrent state of the battery (101). In response to output signals from those comparators, a control circuit (210) performs on/off control of each of a switch (102) and a protection circuit (50). In response to an output signal from the control circuit (210), the protection circuit (50) is turned on, to thereby connect a resistor (125) to a path connecting a VSS terminal and an overcurrent detecting terminal, and is turned off, to thereby disconnect the resistor (125) from the path. As a result, even when the battery is in the overcurrent state, current consumption can be reduced.

REFERENCES:
patent: 7301306 (2007-11-01), Zhang
patent: 7550947 (2009-06-01), Sakurai et al.
patent: 2001/0026147 (2001-10-01), Nakashimo
patent: 2002/0018329 (2002-02-01), Yoshida
patent: 2002/0109483 (2002-08-01), Nakashimo
patent: 2002/0109484 (2002-08-01), Yokota et al.
patent: 2007/0145947 (2007-06-01), Sakurai et al.
patent: 2008/0036422 (2008-02-01), Sakurai et al.
patent: 0059093 (2000-10-01), None

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