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:
Jul. 30, 2002
Filed:
Dec. 04, 2000
Antonin Rozsypal, Hutisko-Solanec, CZ;
Semiconductor Components Industries LLC, Phoenix, AZ (US);
Abstract
A current sense circuit ( ) is provided which receives a signal indicative of output current flow of an up/down DC-DC converter during up-conversion and down-conversion modes. The current sense circuit provides a logic signal (CS) indicative of the rate of change of the current flow for both modes of operation. A comparator ( ) receives a selectable voltage reference generated by voltage reference ( ). A first voltage reference is selected during an increasing current flow (CS=logic high) and a second voltage reference is selected during a decreasing current flow (CS=logic low), thereby regulating the output current (I ) to a fixed average value. If the length of time during continuous current flow of converter ( ) exceeds a predetermined amount of time, a signal (FAULT) is issued and externally processed, which subsequently disables converter ( ) by an external signal (ENABLE).