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:
May. 26, 2015
Filed:
Mar. 20, 2013
Jung-pei Cheng, Huatan Township, Changhua County, TW;
Yu-chang Chen, JiJi Township, Nantou County, TW;
Jiun-hung Pan, Wenshan Dist., Taipei, TW;
Yung-chih Lai, Miaoli, Miaoli County, TW;
Isaac Y. Chen, Zhubei, Hsinchu County, TW;
Chien-fu Tang, East Dist., Hsinchu, TW;
Jyun-che Ho, Xikou Township, Chiayi County, TW;
Jung-Pei Cheng, Huatan Township, Changhua County, TW;
Yu-Chang Chen, JiJi Township, Nantou County, TW;
Jiun-Hung Pan, Wenshan Dist., Taipei, TW;
Yung-Chih Lai, Miaoli, Miaoli County, TW;
Isaac Y. Chen, Zhubei, Hsinchu County, TW;
Chien-Fu Tang, East Dist., Hsinchu, TW;
Jyun-Che Ho, Xikou Township, Chiayi County, TW;
RICHTEK TECHNOLOGY CORP., Hsinchu, TW;
Abstract
A switching power converting apparatus includes a coil unit, a bipolar junction transistor (BJT) controlling power transfer through the coil unit, and a current sensing resistor sensing a current flowing through the BJT so as to produce a sensed voltage thereacross. A switching controller includes a current source supplying a first current, a current generating module generating, based on an input voltage associated with the sensed voltage, a second current, which is proportional to the current flowing through the BJT, a multiplexing module selecting one of the first and second currents as an output current, and a driving module outputting, based on the output current, a driving current, which is proportional to the output current, to the BJT to thereby conduct the BJT.