Battery charge control circuit

Details Battery charge control circuit Battery charge control circuit

1999-04-13

2000-02-29

Tso, Edward H.

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

Regulated discharging

320137, H01M 1046

Patent

active

060313579

ABSTRACT:
A battery charge control circuit has a first transistor and a second transistor. The first transistor is cut off when an output terminal voltage is lower than a line terminal voltage and closes when it is not. The second transistor closes when the first terminal is cut off so as to supply an actuating current to a circuit generating a constant voltage. The closing of the second transistor causes an output transistor current to be variably adjusted and a battery connected to the output terminal to be charged using only the first and second transistors. This simple circuit structure makes it possible to reduce the number of elements and thus the size of the battery charge control circuit and to prevent improper operation.

REFERENCES:
patent: 3659179 (1972-04-01), Barker et al.
patent: 3950689 (1976-04-01), Jamison
patent: 5892353 (1999-04-01), Yama

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