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:
Sep. 04, 2001
Filed:
Feb. 22, 2000
Jefferson W. Hall, Phoenix, AZ (US);
W. David Pace, Phoenix, AZ (US);
Christopher Gass, Tempe, AZ (US);
Semiconductor Components Industries LLC, Phoenix, AZ (US);
Abstract
A switching power supply (,) receives an AC voltage and converts it to a regulated DC voltage. The switching power supply (,) includes a Vcc limiter (,) to limit the operating voltage at the power supply terminal (,) of a integrated regulator circuit (,). The Vcc limiter (,) limits the operating voltage at the power supply terminal (,). When operating voltage at power supply terminal (,) increases, a differential pair of transistors (,) supply a differential current to a current mirror configuration of transistors (,) to supply voltage to a drive transistor (,) to increase current in the drive transistor (,) to a value based on n times the current in a reference transistor (,). An increase in current through the drive transistor (,) counteracts increased operating voltage at the power supply terminal (,), thereby reducing the operating voltage level back to a desired level.