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:
May. 21, 2002
Filed:
May. 26, 2000
Applicant:
Inventors:
Assignee:
Semiconductor Components Industries LLC, Phoenix, AZ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M 3/24 ;
U.S. Cl.
CPC ...
H02M 3/24 ;
Abstract
A pwm controller which includes a Vcc node (pin ); a start-up current source connected to the Vcc node; and a driver circuit also connected to the Vcc node, wherein the pwm controller is arranged to operate in a first phase in which the start-up current source supplies current to the Vcc node but the driver circuit is turned off; a second phase in which the driver circuit is enabled and draws current from the Vcc node; and a third phase in which both the start-up current source and the driver circuit are turned off whereby very little current may be drawn from the Vcc node (pin ) during the third phase.