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:
Jul. 17, 2007
Filed:
May. 09, 2006
Chien-ming Huang, Kaohsiung, TW;
Tsorng-juu Liang, Kaohsiung, TW;
Chien-Ming Huang, Kaohsiung, TW;
Tsorng-Juu Liang, Kaohsiung, TW;
Abstract
A power control circuit includes a power switch unit operable so as to enable and disable supply of an input voltage from an external power source to an LC circuit, a voltage detecting unit for generating a first voltage signal in accordance with an output voltage applied to a load and outputted by the LC circuit, and a current detecting unit for generating a second voltage signal in accordance with a current flowing through the power switch unit. A driver receives a pulse width modulation signal from a comparator in accordance with a comparison result between a summation of the first and second voltage signals and a reference voltage, and outputs a driving signal to a control input unit of the power switch unit so as to control a duty cycle of the power switch unit, thereby controlling rated power supplied to the load to correspond to the reference voltage.