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MAX4211F)跨负载,感官的通过电流和电压和用品在其产出(撅嘴模样)电压成正比的这些变量,连续的产品之一即成比例的负载瞬时功率。外部放大器生成控制p通道MOSFET负荷系列中的相应PWM(脉冲宽度调制)输出信号。Maxim>AppNotes>AmplifierandComparatorCircuitsCircuitProtectionKeywords:constant-powerdrivers,resistiveloads,chopped-DCdrive,opamps,analogmultipliers,current-senseamplifiersNov29,2010APPLICATIONNOTE4523Constant-PowerDriverIsSimple,Efficient,andInexpensiveAbstract:Acombinationcurrent-senseamplifierandmultiplier(MAX4211F)sensesboththecurrentthroughandvoltageacrosstheload,andsuppliesatoneofitsoutputs(POUT)avoltageproportionaltothecontinuousproductofthosevariables,i.e.,proportionaltotheload'sinstantaneouspower.ExternalopampsgenerateacorrespondingPWM(pulsewidthmodulated)outputsignalthatcontrolsap-channelMOSFETinserieswiththeload.Asimilarversionofthisarticl……