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. 17, 2010
Filed:
Apr. 26, 2007
Yukinori Maekawa, Kasugai, JP;
Yoshihiro Nagaya, Kasugai, JP;
Keita Sekine, Kasugai, JP;
Takashi Matsumoto, Kasugai, JP;
Takehito Doi, Kasugai, JP;
Yukinori Maekawa, Kasugai, JP;
Yoshihiro Nagaya, Kasugai, JP;
Keita Sekine, Kasugai, JP;
Takashi Matsumoto, Kasugai, JP;
Takehito Doi, Kasugai, JP;
Fujitsu Semiconductor Limited, Yokohama, JP;
Abstract
A DC-DC converter for converting an input voltage and generating an output voltage. The DC-DC converter includes an adjustment resistor. A control circuit generates a control signal and includes an external terminal to which the adjustment resistor is externally connected. A switching transistor is connected to the control circuit and turned on or off in accordance with the control signal. The control circuit includes an oscillator that generates an oscillation signal. The control circuit generates the control signal based on the oscillation signal and a signal that is in accordance with an output voltage or output current of the DC-DC converter. The oscillator monitors a first amount of current flowing through the external terminal of the control circuit and generates the oscillation signal in a cycle that is accordance with the monitoring result.