Invention Grant
- Patent Title: Switching power converting apparatus, switching controller for the same, and method of controlling a bipolar junction transistor of the same
- Patent Title (中): 开关电源转换装置,其开关控制器及其控制双极结型晶体管的方法
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Application No.: US13847795Application Date: 2013-03-20
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Publication No.: US09042126B2Publication Date: 2015-05-26
- Inventor: Jung-Pei Cheng , Yu-Chang Chen , Jiun-Hung Pan , Yung-Chih Lai , Isaac Y. Chen , Chien-Fu Tang , Jyun-Che Ho
- Applicant: Jung-Pei Cheng , Yu-Chang Chen , Jiun-Hung Pan , Yung-Chih Lai , Isaac Y. Chen , Chien-Fu Tang , Jyun-Che Ho
- Applicant Address: TW Hsinchu
- Assignee: RICHTEK TECHNOLOGY CORP.
- Current Assignee: RICHTEK TECHNOLOGY CORP.
- Current Assignee Address: TW Hsinchu
- Agency: Lackenbach Siegel, LLP
- Agent Andrew F. Young, Esq.
- Priority: TW102100424A 20130107
- Main IPC: H02M3/335
- IPC: H02M3/335 ; H02M1/08 ; H02M1/00

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.
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