Source: http://www.google.com/patents/US7477024?dq=7,346,539
Timestamp: 2014-07-12 04:35:47
Document Index: 161603595

Matched Legal Cases: ['artG1', 'artK1', 'artN1', 'artD1', 'artM1', 'artO1', 'artQ1', 'artE1', 'artL1', 'artP1', 'artR1', 'artB1', 'artH1', 'artI1', 'artJ1', 'artF1', 'artC1', 'artA1', 'art.83', 'art.84', 'art.85']

Patent US7477024 - Sequential burst mode activation circuit - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA sequential burst mode regulation system to deliver power to a plurality of loads. In the exemplary embodiments, the system of the present invention generates a plurality of phased pulse width modulated signals from a single pulse width modulated signal, where each of the phased signals regulates power...http://www.google.com/patents/US7477024?utm_source=gb-gplus-sharePatent US7477024 - Sequential burst mode activation circuitAdvanced Patent SearchPublication numberUS7477024 B2Publication typeGrantApplication numberUS 10/802,901Publication dateJan 13, 2009Filing dateMar 16, 2004Priority dateJan 9, 2001Fee statusPaidAlso published asCN1223239C, CN1456027A, US6501234, US6707264, US7847491, US20020125863, US20030071586, US20040183469, US20090218954, WO2002056643A1, WO2002056643A9Publication number10802901, 802901, US 7477024 B2, US 7477024B2, US-B2-7477024, US7477024 B2, US7477024B2InventorsYung-Lin Lin, Yu-Cheng Chang, Bingwei YaoOriginal AssigneeO2Micro International LimitedExport CitationBiBTeX, EndNote, RefManPatent Citations (111), Non-Patent Citations (99), Referenced by (4), Classifications (15), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetSequential burst mode activation circuitUS 7477024 B2Abstract A sequential burst mode regulation system to deliver power to a plurality of loads. In the exemplary embodiments, the system of the present invention generates a plurality of phased pulse width modulated signals from a single pulse width modulated signal, where each of the phased signals regulates power to a respective load. Exemplary circuitry includes a PWM signal generator, and a phase delay array that receives a PWM signal and generates a plurality of phased PWM signals which are used to regulate power to respective loads. A frequency selector circuit can be provided that sets the frequency of the PWM signal using a fixed or variable frequency reference signal.
ILrms = [ ∫ 1 1 + TL ⁢ ( ILpeak * Sin ⁡ ( t ) ) 2 ⁢ ⅆ t ] / T L = ILpeak / 2 where TL is the period of the sinusoid, t1 and t+TL respectively define the start and end points of one period of the sinusoid, and ILpeak is the peak load current. Diodes 137 filter out the negative portions of IL, thereby generating a waveform, IL(+), an example of which is illustrated by signal 400 in FIG. 9 a, which depicts the half-rectified current waveform delivered to the load. With the phased burst signal, PWM 50, decoupled from circuit 200, VIFB is effectively the voltage across Rsense. That is,
VIFB = [ ∫ 1 1 + TL ⁢ Rsense * IL ⁡ ( + ) ⁢ ⅆ t ] / T L = ( lLpeak * Rsense ) / π Since ILrms=ILpeak/√{square root over (2)},
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(11 pgs).97Wood, "HEXFETs Improve Efficiency, Expand Life of Electronic Lighting Ballasts," International Rectifier Application Note 973 (1996 or earlier). pp. 1-7, International Rectifier, El Segundo, CA.98Yana, et al., "An intellegent inverter for a high power LCD backlight," Journal of the Society for Information Display, vol. 7, No. 3, pp. 163-166 (1999).99Yu et al., "Comparisons Among Self-Excited Parallel Resonant, Series resonant and Current-fed Push-pull Electronic Ballasts," IEEE Applied Power Electronics Conference, (1994) pp. 421-426.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS7719205 *Jun 20, 2008May 18, 2010Zippy Technology Corp.Inverter for driving light sourceUS7847491 *Jan 12, 2009Dec 7, 2010O2Micro International LimitedSequential burst mode activation circuitUS7852019 *Dec 13, 2007Dec 14, 2010Microsemi CorporationUsing a triangular waveform to synchronize the operation of an electronic circuitUS8125160 *Oct 6, 2009Feb 28, 2012O2Micro International LimitedIntegrated circuit capable of synchronization signal detection* Cited by examinerClassifications U.S. Classification315/307, 315/244International ClassificationH02M1/00, H02J1/14, H02M1/36, H05B37/02, H05B41/392Cooperative ClassificationY02B20/202, H02M1/36, H02J1/14, H05B41/3927, H02M2001/008European ClassificationH02M1/36, H05B41/392D8, H02J1/14Legal EventsDateCodeEventDescriptionJul 13, 2012FPAYFee 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©2012 Google