Source: http://www.google.com/patents/US7679347?dq=6,049,612
Timestamp: 2016-06-30 22:31:36
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Matched Legal Cases: ['Application No. 04019981', 'Application No. 04019981', 'Application No. 07', 'Application No. 04019978', 'Application No. 04019978', 'Application No. 04010841', 'Application No. 04011558', 'Application No. 04020568', 'Application No. 04020571', 'Application No. 05012809']

Patent US7679347 - Closed-loop digital control system for a DC/DC converter - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA control system comprises a DC/DC converter that includes first and second inductances, that receives a first DC voltage and that generates a second DC voltage. A control module selectively charges or discharges the first inductance while discharging or charging the second inductance during a first...http://www.google.com/patents/US7679347?utm_source=gb-gplus-sharePatent US7679347 - Closed-loop digital control system for a DC/DC converterAdvanced Patent SearchPublication numberUS7679347 B2Publication typeGrantApplication numberUS 11/710,384Publication dateMar 16, 2010Filing dateFeb 23, 2007Priority dateJul 13, 2004Fee statusPaidAlso published asCN1722592A, CN1722592B, DE602005026233D1, EP1617548A2, EP1617548A3, EP1617548B1, US7190152, US8183846, US20060013023, US20070176585, US20100171478Publication number11710384, 710384, US 7679347 B2, US 7679347B2, US-B2-7679347, US7679347 B2, US7679347B2InventorsRunsheng He, Zhipei ChiOriginal AssigneeMarvell World Trade Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (125), Non-Patent Citations (22), Referenced by (13), Classifications (6), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetClosed-loop digital control system for a DC/DC converter
US 7679347 B2Abstract
A control system comprises a DC/DC converter that includes first and second inductances, that receives a first DC voltage and that generates a second DC voltage. A control module selectively charges or discharges the first inductance while discharging or charging the second inductance during a first mode and one of charges both of the first and second inductances or discharges both of the first and second inductances during a second mode.
This application is a continuation of U.S. patent application Ser. No. 10/890,491 filed on Jul. 13, 2004 and relates to U.S. patent application Ser. No. 10/621,058, filed on Jul. 15, 2003, entitled “Low Loss DC/DC Converter”, U.S. patent application Ser. No. 10/754,187, filed on Jan. 8, 2004, entitled “Digital Low Dropout Regulator”, which is a continuation-in-part of U.S. patent application Ser. No. 10/693,787, filed on Oct. 24, 2003, and U.S. patent application Ser. No. 10/810,452, filed on Mar. 26, 2004, entitled “Voltage Regulator”. The disclosures of the above applications are all hereby incorporated by reference in their entireties.
The present invention relates to DC/DC converters, and more particularly to digital control systems for DC/DC converters.
DC/DC converters are electronic devices that employ inversion and/or rectification to transform DC voltage at a first level into DC voltage at a second level. For example, a DC/DC converter may step-up DC voltage, step-down DC voltage, or may be capable of both stepping up and stepping down DC voltage. DC/DC converters typically include one or more inductors. Inductors are circuit elements that operate based on magnetic fields. The source of the magnetic field is charge that is in motion, or current. If current varies with time, the magnetic field that is induced also varies with time. A time-varying magnetic field induces a voltage in conductors that are linked by the magnetic field.
A closed-loop control system for a DC/DC converter according to the present invention includes a DC/DC converter that receives a first DC voltage and that generates a second DC voltage. The DC/DC converter includes first and second inductances. A control module communicates with the DC/DC converter, receives the second DC voltage, and generates at least one control signal to one of charge or discharge the first and second inductances. The control module has first and second modes. During the first mode the control module alternately charges one of the first and second inductances and discharges the other of the first and second inductances. During the second mode the control module one of charges or discharges both of the first and second inductances.
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