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. 01, 2017
Filed:
Jul. 20, 2016
Rohm Co., Ltd., Kyoto, JP;
Keisuke Tsutsumi, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A power supply circuit has, for example, an overshoot suppressor, a control circuit, a first transistor M, a second transistor M, an inductor L, a capacitor C, resistors Rand R, and an error amplifier ERR. As the load becomes light, the ON-period of the second transistor Mincreases. When the load RL turns from a heavy load to a light or no load, the overshoot suppressordetects an increase in the ON-period of the second transistor M, and then forcibly turns OFF the second transistor M. Thus, an overshoot in the output voltage Vo is suppressed. Detecting an increase in the period for which the driving signal Sremains at high level H helps reduce malfunctioning due to noise.