Circuits and techniques for capacitor charging cir

专利名称：Circuits and techniques for capacitor

charging circuits

发明人：Jeffrey Schenkel,Albert M. Wu,Robert C.

Dobkin,Steven M. Pietkiewicz

申请号：US10324628申请日：20021218

公开号：US20030090240A1公开日：20030515

专利附图：

摘要：The present invention provides a capacitor charging circuit that efficientlycharges capacitive loads. In particular, circuits and techniques are preferably provided for

using current from both the primary and secondary windings of a transformer to controlON-time and OFF-time of a switch. This arrangement preferably yields an adaptable ON-time and adaptable OFF-time switch that is capable of rapidly charging capacitor loadsranging from as low as zero volts to several hundred volts. The output voltage ispreferably measured indirectly to prevent unnecessary power consumption. In addition,control circuitry can be provided to conserve power by ceasing the delivery of power tothe capacitor load once the desired output voltage is reached. Control circuitry

preferably operates an interrogation timer that periodically activates the power deliverycycle to maintain the capacitor output load in a constant state of readiness.

申请人：LINEAR TECHNOLOGY CORPORATION

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