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:
Jan. 06, 1998
Filed:
Jul. 02, 1996
Gourab Majumdar, Tokyo, JP;
Shinji Hatae, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
Disclosed is a method of driving a power converter which can simplify a charging sequence of a charge pump capacitor to reduce the time required to design the device without using a voltage protective circuit and optimum design required to determine the capacitance of the charge pump capacitor. A charging pulse signal for a capacitor (CP) is provided as an input signal from an external control device (EC) substantially simultaneously as a control power source (PS) is switched on to provide a predetermined control power source voltage (V.sub.PS). A driver circuit (DR20) outputs a control signal (V.sub.D) to turn on a transistor (Q2) in a pulse-like manner, starting charging the capacitor (CP). The charging pulse signal continues being provided after completion of the charging of the capacitor (CP) and stops being provided immediately before a PWM signal is provided.