Charge device reduced in size and power consumption

Details Charge device reduced in size and power consumption Charge device reduced in size and power consumption

1995-12-28

1997-11-04

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 15, 320 2, 320 30, H02J 700

Patent

active

056843810

ABSTRACT:
A pair of power supply terminals have parallel-connected therebetween an adapter and a serial connection of a battery and a power MOS circuit composed of a multiplicity of switching and current-limiting MOS transistors of which a particular one has a resistor interconnected between a source electrode thereof and one of the power supply terminals to provide a current detection signal representative of a fraction of a charge or discharge current passing the MOS circuit, and which are controlled with a bias voltage selected between one of potentials at the power supply terminals and an output of a comparator comparing the current direction signal with a reference voltage, in accordance with a level combination control signals output from a control circuit in response to a detection signal representative of a battery voltage and a detection signal representative of a connection state between the adapter and an outlet, permitting a reduced device size and a reduced power consumption.

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