Dual mode battery chargers for portable electronic devices and related methods
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United States of America Patent
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Sep 7, 1999
Grant Date -
N/A
app pub date -
Aug 27, 1997
filing date -
Aug 27, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A dual mode battery charger includes an input that accepts a DC power signal, and a switch that switches the DC power signal from the input responsive to a control signal to generate a charging signal for the battery. A dual mode controller generates the control signal so that during a high current charging mode the switch is closed, and so that during a low current charging mode the switch is switched at a duty-cycle of less than 100 percent. In addition, a filter filters the charging signal to reduce a ripple portion thereof. Related methods and electronic devices are also discussed.
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