Digital control of power converters

Details Digital control of power converters Digital control of power converters

2011-08-23

2011-08-23

Berhane, Adolf (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

Reexamination Certificate

active

08004259

ABSTRACT:
A system and method for controlling a power converter is presented. An embodiment comprises an analog differential circuit connected to an analog-to-digital converter, and comparing the digital error signal to at least a first threshold value. If the digital error signal is less than the first threshold value, a pulse is generated to control the power converter. Another embodiment includes multiple thresholds that may be compared against the digital error signal.

REFERENCES:
patent: 6552606 (2003-04-01), Veltman et al.
patent: 6693400 (2004-02-01), Pedrazzini et al.
patent: 6952131 (2005-10-01), Jeong et al.
patent: 7119525 (2006-10-01), Yoshino
patent: 7200187 (2007-04-01), O'Brien
patent: 7239116 (2007-07-01), Tang
patent: 7276963 (2007-10-01), Wegner
patent: 7391197 (2008-06-01), Chang et al.
patent: 7394314 (2008-07-01), May
patent: 7459864 (2008-12-01), Lys
patent: 2003/0174005 (2003-09-01), Latham, II et al.
patent: 2006/0220938 (2006-10-01), Leung et al.
patent: 2008/0129264 (2008-06-01), Moussaoui et al.
patent: 16 181 68 (2005-05-01), None
patent: 1780131 (2006-05-01), None
patent: 19 252 92 (2007-03-01), None
patent: 1930541 (2007-03-01), None
patent: WO 2005/081770 (2005-09-01), None
Lukić, Z, et al., “High-Frequency Digital Controller for DC-DC Converters Based on Multi-Bit Σ-Δ Pulse-Width Modulation,” 2005, IEEE, pp. 35-40.
Lukić, Z, et al., “Multibit Σ-Δ PWM Digital Controller IC for DC-DC Converters Operating at Switching Frequencies Beyond 10 MHz,” IEEE Transactions on Power Electronics, vol. 22, No. 5, Sep. 2007, pp. 1693-1707.
Parayandeh, A., et al., “Programmable Analog-to-Digital Converter for Low-Power DC-DC SMPS,” IEEE Transactions on Power Electronics, vol. 23, No. 1, Jan. 2008, pp. 500-505.
Dostal, F., “Emulated Ripple Technique Advances Hysteretic Switchmode Supplies,” Feb. 25, 2008, Power Management DesignLine, http://www.powermanagementdesignline.com, 4 pages.
Forejt, B., et al., “A 700+-mW Class D Design With Direct Battery Hookup in a 90-nm Procee,” IEEE Journal of Solid-State Circuits, vol. 40, No. 9, Sep. 2005, pp. 1880-1887.
Pressman, A.I., “‘Buck’ Switching Regulator Topology”, Switching Power Supply Design, 2ndEd., McGraw-Hill, © 1998, pp. 9-24.
Pressman, A.I., “Feedback-Loop Stabilization”, Switching Power Supply Design, 2ndEd., McGraw-Hill, © 1998, pp. 427-448.
Texas Instruments, TPS62000 Data Sheet, “High-Efficiency, Step-Down, Low Power, DC-DC Converter (Rev. E),” http://focus.ti.com/docs/prod/folders/print/tps62000.html; Aug. 18, 2008, © 2000-2008, Texas Instruments Incorporated, Dallas, TX, 26 pages.
Texas Instruments, TPS62040 Data Sheet, “1.2A / 1.25 MHz. High-Efficiency, Step-Down Converter (Rev. B),” http://focus.ti.com/docs/prod/folders/print/tps62040.html, Oct. 28, 2005, © 2003-2005, Texas Instruments Incorporated, Dallas, TX, 29 pages.
Texas Instruments, TPS62220 Data Sheet, “400-mA, 1.25-MHz High-Efficiency Step-Down Converter in Thin-SOT23 (rev. E),” http://focus.ti.com/docs/prod/folders/print/tps62220.html, Feb. 5, 2009, Copyright © 2003-2009, Texas Instruments Incorporated, Dallas, TX, 29 pages.
Texas, Instruments, TPS62260 Data Sheet, “2.25MHz 600mA Step Down Converter in 2x2SON/TSOT23 Package (Rev. B),” http://focus.ti.com/docs/prod/folders/print/tps62260.html, Feb. 19, 2008, Copyright © 2007-2008, Texas Instruments Incorporated, Dallas, TX, 31 pages.
Analog Devices, ADP2102 Data Sheet, “Low Duty Cycle, 600mA, 3MHz Synchronous Step-Down DC-to-DC Converter,” Rev. B, http://www.analog.com/en/power-management/switching-regulators-integrated-fet-switches/ADP2102/products/product.html, Sep. 2007, © 2007 Analog Devices, Inc., Norwood, MA, 24 pages.
Coilcraft, LPS3015 Series Data Sheet, “Low Profile Shielded Power Inductors,” http://www.coilcraft.com/lps3015.cfm, Doc. 436-1, Revised Aug. 5, 2009, © Coilcraft, Inc. 2010, Cary, IL, 2 pages.
Maxim, MAX8640Y/MAX8640Z Data Sheet, “Tiny 500mA, 4MHz/2MHz Synchronous Step-Down DC-DC Converters,” http://datasheets.maxim-ic.com/en/ds/MAX8640Y-MAX8640Z.pdf, 19-3997; Rev 4; Feb. 2009, © 2009 Maxim Integrated Products, Sunnyvale, CA, pp. 1-12.
Linear Technology, LTC3614 Data Sheet, “4A, 4MHz Monolithic Synchronous Step-Down DC/DC Converter,” http://cds.linear.com/docs/Datasheet/3614f.pdf, © Linear Technology Corporation 2010, Milpitas, CA, pp. 1-28.
United States Patent and Trademark Office, Office Action, U.S. Appl. No. 12/134,930, Mar. 4, 2010, 5 pages.
Texas Instruments, “DC/DC Converters (Integrated Switch)—Step-Down Regulators”—TPS62000, http://focus.ti.com/docs/prod/folders/print/tps62000.html, Texas Instruments Incorporated, Dallas, TX, 4 pages, downloaded Jun. 4, 2010.
Texas Instruments, “DC/DC Converters (Integrated Switch)—Step-Down Regulators”— TPS62040, http://focus.ti.com/docs/prod/folders/print/tps62040.html, © 1995-2010, Texas Instruments Incorporated, Dallas, TX, 5 pages, downloaded Jun. 4, 2010.
Texas Instruments, “DC/DC Converters (Integrated Switch)—Step-Down Regulators”—TPS62220, http://focus.ti.com/docs/prod/folders/print/tps62220.html, © 1995-2010, Texas Instruments Incorporated, Dallas, TX, 5 pages, downloaded Jun. 4, 2010.
Texas Instruments, “DC/DC Converters (Integrated Switch)—Step-Down Regulators”—TPS62260, http://focus.ti.com/docs/prod/folders/print/tps62260.html, © 1995-2010, Texas Instruments Incorporated, Dallas, TX, 6 pages, downloaded Jun. 7, 2010.
Analog Devices, ADP2102, “Low Duty Cycle, 600mA, 3MHz Synchronous Step-Down DC-to-DC Converter,” http://www.analog.com/en/power-management/switching-regulators-integrated-fet-switches/ADP2102/products/product.html, 2 pages, downloaded Jun. 7, 2010.
Zhu, C., “The Buck Converter and the Design of Power Managing Chip,” Masters Thesis, Jilin University, Jun. 2004-Apr. 2006, pp. i-iv, 1-61.
Reutemann, R., et al., “A 33mW 14b 2.5MSample/s ΣΔ A/D Converter in 0.25μm Digital CMOS,” IEEE ISSCC 2002, Session 18, Converter Techniques, 18.6, 3 pages.

Affiliated with

Also associated with

Rating

Digital control of power converters does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital control of power converters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital control of power converters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2734158