Patents by Inventor Scott C. Dearborn

Scott C. Dearborn has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • System, method and apparatus to transition between pulse width modulation and pulse-frequency modulation in a switch mode power supply
    Patent number: 8427123
    Abstract: A switch mode power supply (SMPS) has optimized efficiency over an entire operating range, from no load to full load, by transitioning between pulse frequency modulation (PFM) and pulse width modulation (PWM) for control of the SMPS depending upon load current. Accurate, smooth, and seamless transitions between PFM and PWM modes of operation occur at a preset load current(s). PFM operation improves efficiency during light load conditions, and PWM has better efficiency at higher load currents. This is advantageous in battery powered applications, and thereby results in a longer time before battery replacement or recharge is necessary.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: April 23, 2013
    Assignee: Microchip Technology Incorporated
    Inventor: Scott C. Dearborn
  • SYSTEM, METHOD AND APPARATUS TO TRANSITION BETWEEN PULSE WIDTH MODULATION AND PULSE-FREQUENCY MODULATION IN A SWITCH MODE POWER SUPPLY
    Publication number: 20110006744
    Abstract: A switch mode power supply (SMPS) has optimized efficiency over an entire operating range, from no load to full load, by transitioning between pulse frequency modulation (PFM) and pulse width modulation (PWM) for control of the SMPS depending upon load current. Accurate, smooth, and seamless transitions between PFM and PWM modes of operation occur at a preset load current(s). PFM operation improves efficiency during light load conditions, and PWM has better efficiency at higher load currents. This is advantageous in battery powered applications, and thereby results in a longer time before battery replacement or recharge is necessary.
    Type: Application
    Filed: May 25, 2010
    Publication date: January 13, 2011
    Inventor: Scott C. Dearborn