Voltage regulated charge pump with regulated charge current...

Details Voltage regulated charge pump with regulated charge current... Voltage regulated charge pump with regulated charge current...

2007-10-02

2007-10-02

Nguyen, Linh My (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S537000, C363S059000, C363S060000

Reexamination Certificate

active

11190630

ABSTRACT:
A charge pump circuit with a regulated charge current where the amount of current flowing into the flying capacitor depends on the magnitude of the output voltage error, using an OTA to convert the output voltage error into a current. Thus the flying capacitor is not charged when the output load is very low or when the output voltage error is minimal. Voltage overshoots are reduced by a stop circuit which forces pulse skipping and which inhibits the charging of the flying capacitor. Current limiting devices further limit the charge current into the flying capacitor. Full short-circuit protection is provided in one preferred embodiment by current limiting the driver stage of the charge pump circuit. Except for pulse skipping, the charge pump runs at a constant frequency supplied by a clock.

REFERENCES:
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patent: 2001112239 (2001-04-01), None

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