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1、MicrochipCP8025三相BLDC马达驱动器解决方案关键字：马达驱动,BLDC马达,CP8025Microchip公司的CP8025/6是集成了功率模块,睡眠模式和LIN收发器的三相无刷DC(BLDC)马达驱动器,包括有能驱动三个外接NMOS/NMOS晶体管对的三个半桥驱动器,峰值输出电流在12V时为0.5A,具有击穿保护电路,过流保护和短路保护功能,睡眠模式电流5uA,待机模式小于200uA.本文介绍了MCP8025/6主要特性,框图和典型应用电路,以及MCP8025三相BLDC马达驱动评估板主要特性,框图,电路图,PCB元件布局图和材料清单与PCB走线图.TheMCP8025/6
2、devicesare3-phasebrushlessDC(BLDC)powermodulescontainingthreeintegratedhalf-bridgedriverscapableofdrivingthreeexternalNMOS/NMOStransistorpairs.Thethreehalf-bridgedriversarecapableofdeliveringapeakoutputcurrentof0.5Aat12Vfordrivinghigh-sideandlow-sideNMOSMOSFETtransistors.Thedrivershaveshoot-through
3、,overcurrentandshort-circuitprotection.ASleepModehasbeenaddedtoachieveatypical“key-off”quiescentcurrentof5μA.TheMCP8025deviceintegratesacomparator,abuckvoltageregulator,twoLDOregulators,powermonitoringcomparators,anovertemperaturesensor,aLINtransceiver,azero-crossingdetector,aneutralsimulatorandano
4、perationalamplifierformotorcurrentmonitoring.Thephasecomparatorandmultiplexerallowforhardwarecommutationdetection.Theneutralsimulatorallowscommutationdetectionwithoutaneutraltapinthemotor.Thebuckconverteriscapableofdelivering750mWofpowerforpoweringacompanionmicrocontroller.Thebuckregulatormaybedisa
5、bledifnotused.Theon-board5Vand12Vlowdropoutvoltageregulatorsarecapableofdelivering30mAofcurrent.TheMCP8026replacestheLINtransceiver,neutralsimulatorandzero-crossingdetectorinMCP8025withtwolevelshiftersandtwoadditionalopamps.TheMCP8025/6operationisspecifiedoveratemperaturerangeof-40℃to+150℃.Packageo
6、ptionsinclude40-lead5x5QFNand48-lead7x7TQFPwithExposedPad(EP).MCP8025/6主要特性:•AEC-Q100Grade0Qualified•QuiescentCurrent:-SleepMode:5μATypical-StandbyMode:<200μA•LINTransceiverInterface(MCP8025):-CompliantwithLINBusSpecifications1.3,2.2,andSAEJ2602-Supportsbaudratesupto20Kbaud-Internalpull-upresistora
7、nddiode-Protectedagainstgroundshorts-Protectedagainstlossofground-Automaticthermalshutdown-LINBusdominanttimeout•ThreeHalf-BridgeDriversConfiguredtoDriveExternalHigh-SideNMOSandLow-SideNMOSMOSFETs:-Independ
