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. 31, 2015
Filed:
Jan. 05, 2012
Yuki Iwagami, Chiyoda-ku, JP;
Koji Hashimoto, Chiyoda-ku, JP;
Manabu Yamashita, Chiyoda-ku, JP;
Yuji Zushi, Chiyoda-ku, JP;
Mitsunori Nishida, Chiyoda-ku, JP;
Yuki Iwagami, Chiyoda-ku, JP;
Koji Hashimoto, Chiyoda-ku, JP;
Manabu Yamashita, Chiyoda-ku, JP;
Yuji Zushi, Chiyoda-ku, JP;
Mitsunori Nishida, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
In a vehicle-mounted electronic control device having a switching power supply in which a switching element is controlled to obtain a predetermined intermediate voltage Va stepped down from a vehicle-mounted battery, and to which a downstream side coil, a flywheel diode, and an output capacitor are connected to suppress a pulsating voltage, a circuit for suppressing reverse conduction for the switching element is provided in order to prevent that the switching element is reversely conducted and thus a charging voltage of the output capacitor is abnormally lowered when a power supply voltage Vb of the vehicle-mounted battery is abnormally lowered.