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:
Dec. 05, 2017
Filed:
Mar. 08, 2016
Freescale Semiconductor, Inc., Austin, TX (US);
Anandkumar Balakrishnan, Chandler, AZ (US);
Venkata Devarakonda, Chandler, AZ (US);
Meng Wang, Tempe, AZ (US);
NXP USA, Inc., Austin, TX (US);
Abstract
A regulation circuit for powering a device while charging a battery is provided. The regulation circuit includes at least one analog feedback loop, and a digitally controlled feedback loop. The digitally controlled feedback loop includes first and second comparators. The first and second comparators compare an input power supply voltage to first and second threshold voltages, respectively. The second threshold voltage is lower than the first threshold voltage. In response to the comparisons, the digitally controlled feedback loop controls a charging current for charging a battery while also regulating a current to power circuits of the device. If the input power supply voltage drops, the digitally controlled feedback loop responds faster than the analog feedback loop, reducing the risk that to supply voltage will drop too much to reliably power to the device circuits. A method for digitally regulating an output current to charge a battery is also provided.