Electricity: battery or capacitor charging or discharging – Battery or cell charging – Pulsed
Reexamination Certificate
2011-07-12
2011-07-12
Tso, Edward (Department: 2858)
Electricity: battery or capacitor charging or discharging
Battery or cell charging
Pulsed
C320S166000, C323S207000, C323S266000
Reexamination Certificate
active
07977921
ABSTRACT:
Voltage conversion and charging circuitry and method for converting an alternating current (AC) voltage to a direct current (DC) voltage for charging an energy storage element (e.g., battery or supercapacitor). An output capacitance, which is initially charged quickly for use in the slower charging of a battery, also maintains the charge on an input capacitance which provides power for the charging control circuitry during such charging process. In accordance with a preferred embodiment, the DC charging current is substantially constant during a first time interval following which the DC charging power is substantially constant during a second time interval.
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Bahai Ahmad
Djabbari Ali
Liu Qingguo
Zhang Jianhui
National Semiconductor Corporation
Tso Edward
Vedder Price P.C.
Williams Arun
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