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. 25, 2015
Filed:
Mar. 07, 2013
Upi Semiconductor Corp., Hsinchu County, TW;
Hung-Hsuan Cheng, Hsinchu County, TW;
uPI Semiconductor Corp., Hsinchu County, TW;
Abstract
A DC-DC controller is provided. The DC-DC controller is connected to an output stage and a load, and the output stage is connected to the load through an output inductor. The DC-DC controller includes an error amplifier, a pulse width modulation (PWM) generation circuit and a compensation circuit. A first input terminal of the error amplifier is connected to one terminal of the output inductor. A second terminal of the error amplifier receives a reference voltage. The PWM generation circuit is connected to the error amplifier and provides a PWM signal to the output stage. The compensation circuit is at least connected to an output terminal of the error amplifier. The compensation circuit includes an adjustable capacitor circuit. The adjustable capacitor circuit adjusts an equivalent capacitance value according to a change of the load dynamically, so as to speed up a reaction rate in the transient response.