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:
Aug. 20, 2002
Filed:
Aug. 31, 2000
Applicant:
Inventor:
Hideto Takagishi, San Jose, CA (US);
Assignee:
Monolithic Power Systems, Inc., Santa Clara, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05F 1/40 ;
U.S. Cl.
CPC ...
G05F 1/40 ;
Abstract
A battery charger is provided that does not sink current from the battery during a reverse mode of operation. The battery charger includes upper and lower switching circuits, which alternately activate and deactivate to provide outgoing current flow. A comparator is coupled to the lower switching circuit to detect current flow into the upper and lower switching circuits. If this current flow is detected, a control circuit is provided that will deactivate the lower switching circuit to prevent subsequent incoming current flow. Further, a transistor is coupled to the lower switching circuit to detect the incoming current flow.