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. 06, 2018
Filed:
Jan. 12, 2017
Winbond Electronics Corp., Taichung, TW;
Chung-Chih Hung, Taichung, TW;
Chun-Yen Chiang, Taichung, TW;
Winbond Electronics Corp., Taichung, TW;
Abstract
A lithium battery control circuit and a lithium battery charger are provided. The lithium battery charger includes the lithium battery control circuit. The lithium battery control circuit includes a smooth transition circuit and an off-time control circuit. The smooth transition circuit generates a first voltage according to a sense current signal and a feedback signal, and generates a second voltage according to a mode signal. The smooth transition circuit compares the first voltage with the second voltage to generate a reset signal. The off-time control circuit converts the feedback signal to generate a first current by a voltage-to-current mechanism, and generates a set signal by using the first current and a duty ratio signal. The invention may prevent a surge current and an oscillation phenomenon by the smooth transition circuit. A switching frequency and a ripple size of an output current are controlled by the off-time control circuit.