RY201AT3 低功耗零交叉检测器 SOT23-3 深圳恒锐丰科技.pdf
RY201AT3
LowPowerLossZero-CrossingDetector
Features
•InputVoltageRange:3-5.5V•LowQuiescentCurrent10uA
•IntegrateRectifierDiode•EffectivelyPreventPowerLineNoise
•RequireLessPeripheralDevices•IntegrateZenerDiode
•EnvironmentTemperature:-40℃~85℃•SOT-23-3package
Applications
•PLC•DomesticAppliance
•PowerEquipmentAccess•RGBLightingSynchronousControl
GeneralDescription
RY201AT3isaspecialchipforzero-crossingdetectioncircuitbydetectinginputvoltage.Wheninputlinevoltage
islessthanthreshold,RY201AT3drivestheopticalcouplingchip,providingzero-crossingdetectionsignalto
applicationcontrolsystem,whiletheinputvoltageisgreaterthanthethreshold,theoutputpresentshighresistance.
RY201AT3hasextremelylowpowerconsumption,aquiescentcurrentoflessthan10µA,sothatmostofthe
electricalenergyisusedtodrivetheoptocouplertoobtainawidezero-crossingdetectionpulsetomakeiteasierto
bedetectedbythesystem.Aschmittflip-flopisusedinVINpin,thehighlevelis2.5V,thelowlevelis0.6V,Internal
hysteresisalsomakesRY201AT3easiertofiltertheglitchonthepowerlineandeffectivelypreventerrorzero-
crossingdetectioncausedbynoiseonpowerlinesignal.ArectifierdiodeisintegratedinsideRY201AT3,rectifying
theinputvoltagetoprovidepowersupplyforICandoptocouplerwithonlyacapacitor,azenerdiodeisalso
integratedatinputterminaltolimitthemaximumvoltage,ov