Charge/discharge control circuit and charging type power-supply

Details Charge/discharge control circuit and charging type power-supply Charge/discharge control circuit and charging type power-supply

1997-06-12

1999-11-23

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

320136, 320163, 320164, H02J 700

Patent

active

059906634

ABSTRACT:
To enhance the performance as well as the reliability and safety of a charge/discharge control circuit and a charging type power-supply unit using it, a charge/discharge control circuit 102 is made to have a circuit construction wherein when a load 109 has been connected at a time of a secondary cell 101 being charged and being in a state having been protected from the charging operation, the state of protection from the charging operation is released to thereby make a switch circuit 103 "on" and permit effective performance of the discharging operation while, on the other hand, when a transition occurs from even this state to a state where excess current is consumed from the secondary cell 101 and as a result an excessive amount of current flows through the switch circuit 103, control can be made so that the discharging from the secondary cell 101 may be stopped, thereby enabling avoidance of the FETs from breakage.

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