AC-to-DC voltage conversion and charging circuitry

Details AC-to-DC voltage conversion and charging circuitry AC-to-DC voltage conversion and charging circuitry

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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patent: 2005/0110468 (2005-05-01), Turner et al.
patent: 2005/0151517 (2005-07-01), Cook et al.
patent: 2009/0027930 (2009-01-01), Usui
patent: 2009/0027931 (2009-01-01), Usui
patent: 2009/0315518 (2009-12-01), Soma et al.

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