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:
Mar. 01, 2016
Filed:
Mar. 09, 2011
Koichi Mizutani, Toyota, JP;
Kouichi Yamanoue, Hiroshima, JP;
Koichi Mizutani, Toyota, JP;
Kouichi Yamanoue, Hiroshima, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi-ken, JP;
VISTEON GLOBAL TECHNOLOGIES, INC, , MI (US);
Abstract
A switching power supply circuit includes a PWM drive circuit () that performs the PWM driving of a switching element (Q) at a duty ratio (D) commensurate with an input target voltage (VS), and generates from an input voltage (VB) an output voltage (VTL) whose target value is the target voltage (VS), by the PWM drive circuit () driving the switching element (Q). The switching power supply circuit further includes a control circuit () and a target voltage limiting circuit () that together fix the duty ratio (D) regardless of the target voltage (VS), when a difference between the input voltage (VB) and the target voltage (VS) is less than or equal to a predetermined constant value (α).