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:
Oct. 25, 2016
Filed:
Mar. 13, 2015
Active-semi, Inc., Tortola, VG;
Hong Mao, Allen, TX (US);
Active-Semi, Inc., , VG;
Abstract
A power bank device has a single circuit topology involving a DC-to-DC converter and four transistors so that this single topology can be used both to charge battery cells with a regulated current in a charging step-up boost mode and to drive a regulated voltage onto a power bank voltage output node in a discharging step-down buck mode. In one example, the circuit includes a first transistor coupled to conduct current between a battery voltage node and a switch node SW, a second transistor coupled to conduct current between the SW node and a ground node, and third and fourth transistors coupled in series to conduct current between a voltage input node and the voltage output node. The inductor of the converter is coupled between the SW node and the voltage output node, and the output capacitor of the converter is coupled between the voltage output node and the ground node.