Louis J Diana

US Patent:

7613017, Nov 3, 2009

Filed:

Oct 4, 2005

Appl. No.:

11/243093

Inventors:

Louis Robert Diana - Fountainville PA, US
Dominick Frank Travaglini - Doylestown PA, US

Assignee:

Lockheed Martin Corporation - Bethesda MD

International Classification:

H02M 3/335

US Classification:

363 20, 363 2101

Abstract:

The present invention is generally directed to power converter systems and methods that regulate an output voltage by gating a fixed energy pulse. For example, a comparator may be used to gate a programmable timer that is optimized to provide a fixed “on-time” and “off-time” for a given load. For line variations, the on-time is adjusted via a control loop. That is, the on-time is compensated via the control loop to provide a fixed amount of energy at the output of the power converter. The off-time is configured to deliver the fixed duration of energy to the output storage capacitor. The comparator monitors the output voltage to allow a single fixed energy pulse to pass to the output storage capacitor when the output voltage is below a desired level. When the output voltage is above the desired level, energy transfer is temporarily ceased (i. e. , energy pulses temporarily stop).