Original document(23 pages)  中文版
    A power supply circuit comprising a first switching transistor having a control terminal and a control terminal switching threshold and that charges current from a voltage source into a charge storage capacitor, a control circuit controlling the on/off operation of the switching transistor whereby the switching transistor is turned on when the voltage of the voltage source is below a predetermined level and turned off when the voltage of the voltage source is above the predetermined level, a control voltage supply circuit providing a control voltage to the control terminal of the switching transistor substantially in excess of the switching threshold when the voltage of the voltage source is below the predetermined voltage thereby to drive the switching transistor on in a saturated region of operation; and a charge storage capacitor for providing an output voltage of the power supply.
Application Number
申请号		 200480022996 Application Date
申请日		 2004.06.08
Title 名称 High efficiency off-line linear power supply
Publication Number
公开号		 1836193 Publication Date
公开日		 2006.09.20
Approval Pub. Date Granted Pub. Date
International Classification 分类号 G05F1/40,H05B37/02
Applicant(s) Name
申请人		 Lutron Electronics Co.
Address 地址
Inventor(s) Name 发明人 Steffie Jamie J.
Attorney & Agent 代理人 cheng wei

  
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