电流限制电路的降压稳压器

MAX4173H电流检测放大器实现MAX1692PWM降压调节器的电流限制。Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSPOWER-SUPPLYCIRCUITSKeywords:currentlimit,currentsenseamplifier,buckregulator,pwm,step-downregulatorDec01,2000APPLICATIONNOTE478Current-LimitCircuitfortheBuckRegulatorAbstract:ThisarticledemonstrateshowtoachievecurrentlimitfortheMAX1692PWMstep-downregulatorbyusingaMAX4173Hcurrent-senseamplifier.AdditionalInformation:qQuickViewDataSheetfortheMAX1692qQuickViewDataSheetfortheMAX4173qSamplesandLiteratureOrderFormqTechnicalSupport:PowerAcurrentlimitcanbeaddedtoastep-downconverterbyusingaMAX4173Hcurrent-senseamplifiertoinjectcurrentintothefeedbacknetwork.D1sharpensthethresholdofcurrent