Power supply system for portable electronic devices

Details Power supply system for portable electronic devices Power supply system for portable electronic devices

1997-12-17

1999-11-16

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Battery or cell charging

With detection of current or voltage amplitude

320125, H02J 700

Patent

active

059864370

ABSTRACT:
A power supply system for a portable device such as portable personal computer, to be operated from a DC power source supplied from a rechargeable battery or an AC adapter includes: an input current detecting circuit for detecting an input current supplied from the AC adapter and for generating a detection signal having a magnitude which varies depending upon the input current, and a charging current control circuit for controlling the amount of the charging current in response to the detection signal. The power supply system has low power losses and effects a high efficiency battery charging.

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