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:
Sep. 04, 2012
Filed:
Nov. 10, 2009
Michinori Naito, Toyoake, JP;
Naoyuki Todoroki, Sagamihara, JP;
Kenta Ota, Hadano, JP;
Junya Ide, Hadano, JP;
Yusuke Morita, Hadano, JP;
Michinori Naito, Toyoake, JP;
Naoyuki Todoroki, Sagamihara, JP;
Kenta Ota, Hadano, JP;
Junya Ide, Hadano, JP;
Yusuke Morita, Hadano, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
By using switching power supplies a, b, and n, which have detection function of over-current, over-voltage and low voltage, in the case where a short-circuit occurred in a load which is connected to output of a switching power supply, and in the case where a MOSFET of the switching power supply is in a short-circuit state and broken, a main power is forced to be off, and a failure log of the switching power supply is stored in a non-volatile memory unit EEPROM; and also in the case where the main power was turned off and on, even if an abnormal log of the switching power supply logged in the non-volatile memory unit, reclosing of the main power is suppressed and which of the switching power supply occurred failure is notified to the outside.