Source: http://www.google.com/patents/US7609043?dq=5960409
Timestamp: 2015-03-01 04:35:15
Document Index: 340015200

Matched Legal Cases: ['Application No. 04023251', 'Application No. 04023259', 'Application No. 04023192', 'Application No. 04023249', 'Application No. 04023234', 'Application No. 04023256', 'Application No. 04023257', 'Application No. 04023258', 'Application No. 03763431', 'Application No. 04023256', 'Application No. 200410088924', 'Application No. 200410088916', 'Application No. 200410088920', 'Application No. 200410088924', 'Application No. 2005', 'Application No. 200410088922', 'Application No. 03805465', 'Application No. 04', 'Application No. 04', 'Application No. 04', 'Application No. 04', 'Application No. 04', 'Application No. 04', 'Application No. 04', 'Application No. 04', 'Application No. 04', 'Application No. 04', 'Application No. 04', 'Application No. 2004', 'Application No. 2004', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 2005', 'Application No. 03805465', 'Application No. 200410088923', 'Application No. 200410088922']

Patent US7609043 - Power array system and method - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA method of sensing current comprises providing a current sensor having a gain resolution; setting the gain resolution of the current sensor to an initial resolution; sensing current flowing through the current sensor; evaluating an amplitude of the current; and changing the gain resolution of the current...http://www.google.com/patents/US7609043?utm_source=gb-gplus-sharePatent US7609043 - Power array system and methodAdvanced Patent SearchPublication numberUS7609043 B2Publication typeGrantApplication numberUS 12/080,645Publication dateOct 27, 2009Filing dateApr 4, 2008Priority dateJul 10, 2002Fee statusPaidAlso published asCN1603998A, CN1603999A, CN1604000A, CN1604001A, CN1604001B, CN1604002A, CN1604445A, CN1607716A, CN1607717A, CN1639659A, CN1664737A, CN100380798C, CN100392551C, CN100392552C, CN100392971C, CN100407086C, CN100416442C, CN100416998C, CN100440097C, CN100440098C, DE60323498D1, DE60323499D1, DE60323501D1, DE60324148D1, DE60334102D1, DE60336816D1, DE60336817D1, DE60336818D1, DE60337012D1, EP1532501A2, EP1532501B1, US6894465, US6933711, US6977492, US6979988, US7009372, US7023192, US7042202, US7053594, US7358711, US7368898, US7411377, US7573249, US7622904, US7863880, US20040008016, US20040155640, US20040178785, US20040183510, US20040196015, US20040196016, US20040196017, US20040196018, US20040239300, US20050156581, US20060022657, US20080030176, US20080030182, US20080186014, WO2004006037A2, WO2004006037A3Publication number080645, 12080645, US 7609043 B2, US 7609043B2, US-B2-7609043, US7609043 B2, US7609043B2InventorsSehat Sutardja, Runsheng He, Jiancheng ZhangOriginal AssigneeMarvell World Trade Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (103), Non-Patent Citations (67), Referenced by (1), Classifications (34), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetPower array system and method
US 7609043 B2Abstract
A method of sensing current comprises providing a current sensor having a gain resolution; setting the gain resolution of the current sensor to an initial resolution; sensing current flowing through the current sensor; evaluating an amplitude of the current; and changing the gain resolution of the current sensor based on the evaluating.
1. A method of sensing current, comprising:
setting the gain resolution of the current sensor to an initial resolution;
sensing current flowing through the current sensor;
changing the gain resolution of the current sensor based on the evaluating.
2. The method of claim 1 wherein the sensing includes indirectly sensing the current.
3. The method claim 2 wherein the indirectly sensing includes;
measuring a voltage across a predetermined impedance; and
calculating the amplitude of the current based on the voltage and the predetermined impedance.
4. The method of claim 1 further comprising using the current sensor in an output regulator.
5. The method of claim 4 wherein the output regulator operates at a switching frequency, wherein the gain resolution is adjustable at a sampling frequency, and wherein the sampling frequency is at least 100 times greater than the switching frequency.
6. The method of claim 1 wherein the changing includes:
estimating a maximum resolution based on the amplitude of the current; and
7. The method of claim 1 wherein the changing includes evaluating a resolution trigger.
8. The method of claim 7 further comprising selecting the resolution trigger based on the amplitude of the current.
9. The method of claim 7 wherein the current flows through parallel power switches and wherein the resolution trigger is selected based on a number of the parallel power switches that are enabled.
10. The method of claim 7 wherein the current flows through parallel power switches and wherein the resolution trigger is selected based on a predetermined time in a conduction cycle of the parallel power switches. Description
This application is a continuation of application Ser. No. 11/080,829, filed Mar. 15, 2005, which is a divisional of application Ser. No. 10/818,508, filed Apr. 5, 2004, which is a divisional of application Ser. No. 10/460,825, filed Jun. 12, 2003 which claims the benefit of the filing date of U.S. provisional applications Nos. 60/395,115 filed Jul. 10, 2002, and 60/395,697 filed Jul. 12, 2002, the entire contents of which are herein incorporated by reference.
Upk=Up*−ADJ k *FAC on Downk=Down*+ADJ k *FAC off where FAC may be determined based on the nominal duty cycle, g
where Fslope is a constant, ek−ek-n is an average of the error from the �n� prior cycles where �n� is the number of samples in a switching period, and
A mode selector 976 may select between the modes of the duty cycle estimator 970 on the basis of a mode selection criteria. In one aspect, the mode selector 976 may select between Up*1, and Up*2 on the basis of the difference between Up*1, and Up*prior, as follows:
FIG. 34A shows an aspect of a digital controller 1100 for controlling the transition between switching modes of an output regulator. Specifically, the digital controller 1100 may control switching between continuous current mode (CCM) operation and discontinuous current mode (DCM) operation.
FIG. 34B shows waveforms associated with DCM operation. A first waveform, Vout, 1110 shows a regulated output voltage of the output regulator. A second waveform shows an inductor current, IL, 1112 of the output regulator. During DCM, the regulated output voltage 1110 and the inductor current 1112 operate in three phases; a conduction phase, a freewheeling phase, and a discontinuous phase. During the conduction phase, energy from an input source is conducted to the output filter causing the inductor current 1112 to ramp up transferring energy to the regulated output (load) leading to an increase in the regulated output voltage 1110. During the freewheeling phase, energy stored in the inductor is transferred to the regulated output causing the inductor current 1112 and the regulated output voltage 1110 to ramp down. During the discontinuous phase, all of the energy in the inductor has transferred to the regulated output so the inductor current may remain at approximately zero and energy is transferred from an output capacitor to supply energy to the regulated load.
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No. 60/395,697, filed Jul. 12, 2002, Sutardja et al.67Xunwei Zhou et al; "Improve Light Load Efficiency for Synchronous Rectifier Buck Converter"; 1999; pp. 295-302.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8263912Feb 26, 2008Sep 11, 2012Denso CorporationNoise reduced PWM driverClassifications U.S. Classification323/285, 323/283International ClassificationH02M3/158, H02M1/12, H02M3/155, H02M3/335, G05F1/40, G05F1/56, H02M1/088, H02M3/137, G05F1/575Cooperative ClassificationH02M1/088, H03K17/167, H02M3/157, Y02B70/1466, H02M1/38, H02M2001/0009, H03K17/122, H03K5/1565, H03K17/6871, H02M2001/0048, Y02B70/1491, H02M2001/0012, H02M2001/0025, H02M3/1588, H02M3/158European ClassificationH02M3/158, H03K17/16B4B2, H02M3/157, H03K17/12B, H02M1/38, H03K5/156D, H02M3/158S, H02M1/088Legal EventsDateCodeEventDescriptionApr 29, 2013FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services