DRIVER DEVICE AND DRIVING METHOD FOR DRIVING A LOA

专利名称：DRIVER DEVICE AND DRIVING METHOD FOR

DRIVING A LOAD, IN PARTICULAR AN LEDUNIT

发明人：ELFERICH, Reinhold,LOPEZ,

Toni,RADERMACHER, Harald Josef Guenther

申请号：EP12770225.6申请日：20120725公开号：EP2740324B1公开日：20170329

摘要：The present invention relates to a driver device and a corresponding drivingmethod for driving a load (22), in particular an LED unit, said driver device comprisingpower input terminals (51, 52) for receiving a periodic supply voltage from an externalpower supply potentially including a dimmer for dimming said periodic supply voltage,power output terminals (53, 54) for providing a drive voltage and/or drive current fordriving a load (22), a power stage (70a, 70b, 70c, 70d) coupled between the power inputterminals and the power output terminals for controlling an input current received fromsaid power input terminals to draw a high power from said external power supply in afirst mode or to draw a low or no power from said external power supply in a secondmode, said high power being higher than the power required for driving said load andsaid low power being lower than the power required for driving said load, wherein saidpower stage controls said input current to be in the second mode only for a percentageof half cycle periods of a number of subsequent half cycle periods of said supply voltage,and for providing said drive voltage and/or drive current to said power output terminals

in said first mode, and an energy storage unit (90) coupled to said power stage forstoring electrical energy provided at said power input terminals in said first mode and forproviding stored electrical energy to said load via said power output terminals in saidsecond mode.

申请人：PHILIPS LIGHTING HOLDING BV

地址：NL

国籍：NL

代理机构：van Eeuwijk, Alexander Henricus Waltherus

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