The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 11, 2001
Filed:
Feb. 23, 2001
Charles E. Mullett, Santa Paula, CA (US);
Thomas M. Ingman, Somis, CA (US);
Condor D.C. Power Supplies Inc., Oxnard, CA (US);
Abstract
An output voltage regulation system allows independent output regulation of multi-output dc-dc switched-mode power converters. The channel resistance of MOSFET synchronous output rectifiers are controlled to obtain the voltage drop required to keep the respective output between predetermined limits concurrent with wide excursions in output load. A typical circuit has a transformer with an input winding coupled to a dc source. A transformer has at least a first and second output winding. A switched-mode regulator means samples a portion of the first output voltage and provides at least a first pulse-width modulated drive voltage having a first state and a second state to a first input semiconductor switch control terminal. The drive voltage first state turns the input semiconductor switch on and the drive voltage second state turns the input semiconductor switch off. The switched-mode regulator means is further characterized to adjust the ratio of the switch's on time to the switch's off time to control the first output voltage to remain within a predetermined range that is proportional to a precision reference voltage. A gate drive means is responsive to at least the first pulse-width modulated drive voltage for providing a first gate drive signal having a peak voltage swing to the synchronous rectifier control terminal. A control means samples a portion of the second dc output voltage and controls the peak voltage swing of the first gate drive signal to control the second output voltage to remain within a predetermined range.