Smart VRM to extend the battery life

Details Smart VRM to extend the battery life Smart VRM to extend the battery life

2005-03-29

2005-03-29

Sherry, Michael (Department: 2838)

Electricity: battery or capacitor charging or discharging

Battery or cell charging

Pulsed

C320S139000

Reexamination Certificate

active

06873136

ABSTRACT:
In a method and system for generating a regulated direct current (DC) voltage output of a voltage regulator module (VRM) to power a device of the information handling system, an activity input, which is indicative of levels of activity of a processor included in the device, is received by the controller module. The controller module selects a first switching frequency from a plurality of switching frequencies of the VRM. The first switching frequency corresponds to a first level of activity. A charge switch is operable to receive a DC voltage input and generate a switched IDC voltage output having the first switching frequency. A discharge switch is operable to provide a discharge path for the switched DC voltage signal while the charge switch is open. A filter module is operable to filter the first switching frequency from the switched DC voltage output and generate the regulated DC voltage output.

REFERENCES:
patent: 6118676 (2000-09-01), Divan et al.
patent: 6448672 (2002-09-01), Voegeli et al.
patent: 6545450 (2003-04-01), Ledenev et al.
patent: 6559684 (2003-05-01), Goodfellow et al.
Zhou, Xunwei et al.;Investigation of Candidate VRM Topologies for Future Microprocessors, IEEE Transactions on Power Electronics, vol. 15, No. 6, Nov. 2000.

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