High efficiency charge pump DC to DC converter circuits and...

Details High efficiency charge pump DC to DC converter circuits and... High efficiency charge pump DC to DC converter circuits and...

2008-03-11

2008-03-11

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C363S060000

Reexamination Certificate

active

11651219

ABSTRACT:
In one embodiment the present invention includes a voltage converter operable in both buck and boost modes. The voltage converter may only include one switched capacitor. A programmable current source, which may be implemented as a switch array, generates a current into the switch capacitor during a first time period to produce a voltage across the capacitor. During a second time period, the voltage may be transferred to the output of the converter, or boosted by coupling the input voltage to one terminal of the switched capacitor coupling the other terminal of the capacitor to the output. A feedback circuit is coupled to a controller for reprogramming the current into the capacitor to maintain the output voltage at desired levels.

REFERENCES:
patent: 6650100 (2003-11-01), Kohout et al.
patent: 6661683 (2003-12-01), Botker et al.
patent: 6788039 (2004-09-01), Abdoulin
patent: 2002/0109540 (2002-08-01), Meng

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