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, 2020
Filed:
Aug. 23, 2018
Rohm Co., Ltd., Kyoto, JP;
Osamu Yanagida, Kyoto, JP;
Tetsuro Hashimoto, Kyoto, JP;
ROHM CO., LTD., Ukyo-Ku, Kyoto, JP;
Abstract
A control circuit of a DC/DC converter includes: a driver turning on a switching transistor and turning off a rectifying transistor in on state, turning off the switching transistor and turning on the rectifying transistor in off state, and turning off the switching transistor and turning off the rectifying transistor in high impedance state; and a switching controller controlling the on state, the off state and the high impedance state, wherein the switching controller repeats a process including: transitioning to the off state when predetermined condition is satisfied in the on state; transitioning to the high impedance state with zero-cross of coil current flowing into an inductor as trigger in the off state; measuring variable time per cycle and transitioning to the off state with time-up as trigger; and transitioning to the on state when feedback voltage corresponding to output voltage of the DC/DC converter decreases to lower threshold voltage.