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. 29, 2016
Filed:
Sep. 05, 2014
Applicant:
Rohm Co., Ltd., Kyoto, JP;
Inventor:
Osamu Yanagida, Kyoto, JP;
Assignee:
ROHM CO., LTD, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/158 (2006.01); H02M 1/15 (2006.01); H02M 1/00 (2007.01);
U.S. Cl.
CPC ...
H02M 3/1582 (2013.01); H02M 2001/0025 (2013.01);
Abstract
A control circuit of a step-up/step-down DC/DC converter includes: a hysteresis comparator configured to receive a feedback voltage and a reference voltage, compare the feedback voltage with a threshold voltage corresponding to the reference voltage, and generate a pulse signal indicating a result of the comparison; a logic unit configured to fix a second switching transistor at an OFF state and switch a first switching transistor based on the pulse signal in a step-down mode and fix the first switching transistor at an ON state and switch the second switching transistor based on the pulse signal in a step-up mode.