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:
Jun. 05, 2018
Filed:
Apr. 15, 2016
Applicant:
Rohm Co., Ltd., Ukyo-Ku, Kyoto, JP;
Inventor:
Kenichi Motoki, Kyoto, JP;
Assignee:
ROHM CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/335 (2006.01); H02J 7/02 (2016.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
H02M 3/33523 (2013.01); H02J 7/022 (2013.01); H02M 3/33576 (2013.01); H02M 2001/0025 (2013.01); H02M 2001/0032 (2013.01); Y02B 70/16 (2013.01);
Abstract
A power supply apparatus is provided, that supplies a bus voltage Vto a detachable device. A DC/DC converter generates a DC voltage Vused as the bus voltage V. A USB controller receives the DC voltage Vas a power supply voltage, and detects whether or not the device is connected. The DC/DC converter generates the DC voltage Vsuch that (i) when the device is detected, the DC voltage Vhas a specified voltage level, and such that (ii) when the device is not detected, the DC voltage Vhas a voltage level that is lower than the specified voltage level and that is higher than a minimum operating voltage level required to operate the USB controller.