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:
Apr. 27, 2010
Filed:
Mar. 30, 2007
Sridhar Kotikalapoodi, Santa Clara, CA (US);
Farzan Roohparvar, Monte Sereno, CA (US);
Tivadar Szabo, San Jose, CA (US);
Manisha Pandya, Anaheim Hills, CA (US);
Sridhar Kotikalapoodi, Santa Clara, CA (US);
Farzan Roohparvar, Monte Sereno, CA (US);
Tivadar Szabo, San Jose, CA (US);
Manisha Pandya, Anaheim Hills, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
Traditionally, system loads are placed in parallel with the battery. This simple topology wastes the available power if the USB power and/or wall adapter is present. Recent topologies have made some improvements by powering the load by the maximum available voltage. Thus, if a USB power source or wall adapter is present, the load is powered by them rather than the battery, thus improving the system efficiency. However, since the USB power and wall adapter power are current limited, if the load requires higher current than the current limited USB or adapter, then the entire system is powered at voltage of the battery. The present invention further improves the system efficiency by distinguishing the load and powering the constant power loads by the maximum voltage and placing the constant current loads in parallel with the battery.