Single-IC PWM Modulator Has 2% Linearity

Abstract:ThisLED-drivercircuitproducesa500HzPWMsignalwith2%nonlinearityanddutycycleadjustablefrom0to100%,usinga0V-to-5VDCcontrolsignal.Maxim>DesignSupport>AppNotes>AmplifierandComparatorCircuits>APP4502Maxim>DesignSupport>AppNotes>DisplayDrivers>APP4502Keywords:LEDdrivers,LEDdimming,pulse-widthmodulation,PWM,dualcomparatorsAug10,2010APPLICATIONNOTE4502Single-ICPWMModulatorHas2%LinearityBy:AhmadAyarAbstract:ThisLED-drivercircuitproducesa500HzPWMsignalwith2%nonlinearityanddutycycleadjustablefrom0to100%,usinga0V-to-5VDCcontrolsignal.AsimilarversionofthisarticleappearedintheAugust28,2008issueofElectronicDesignmagazine.SomeLED-drivercircuitsachievedimmingbyapplyingavariabledutycycle(PWM)totheLED