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:
Nov. 03, 2015
Filed:
Mar. 26, 2014
Applicant:
Magnachip Semiconductor, Ltd., Cheongju-si, KR;
Inventors:
Assignee:
Magnachip Semiconductor, Ltd., Cheongju-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/156 (2006.01); G05F 3/30 (2006.01); H02M 3/158 (2006.01); H02M 1/14 (2006.01);
U.S. Cl.
CPC ...
H02M 3/158 (2013.01); H02M 1/143 (2013.01);
Abstract
Provided are a ramp circuit and a DC-DC converter. The ramp circuit generates a current flowing in a resistor using voltages affected by an output voltage and an input voltage of a DC-DC converter, and generates a ramp signal through copying of the current and charging and discharging of a capacitor using a current mirror unit. The ramp signal is generated by considering the input voltage and the output voltage, and thus the ramp signal has an optimal slope to provide an adaptive response to state change in the input voltage and the output voltage. The DC-DC converter uses such a ramp circuit to facilitate its operation.