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:
Nov. 02, 2004
Filed:
Oct. 25, 2002
Applicant:
Inventor:
David A. Grant, Dallas, TX (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/40 ;
U.S. Cl.
CPC ...
G06F 1/40 ;
Abstract
A switch mode converter uses the bootstrap capacitor to operate all the way to 100% duty cycle by adding only a very small amount of low-area extra circuitry. The additional circuitry includes a charge pump and a duty cycle detect device . When the duty cycle detect device detects that the converter is attempting to operate in % duty cycle, the charge pump provides additional charge to the bootstrap capacitor to ensure that the 100% duty cycle is maintained.