无刷子的dc马达控制器

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1、applicationUC1625INFOUC2625availableUC3625BrushlessDCMotorControllerFEATURESDESCRIPTION•DrivesPowerMOSFETsorPowerDarlingtonsTheUC3625familyofmotorcontrollerICsintegratemostoftheDirectlyfunctionsrequiredforhigh-performancebrushlessDCmotorcon-trolintoonepackage.When

2、coupledwithexternalpower•50VOpenCollectorHigh-SideDriversMOSFETsorDarlingtons,theseICsperformfixed-frequencyPWM•LatchedSoftStartmotorcontrolineithervoltageorcurrentmodewhileimplementingclosedloopspeedcontrolandbrakingwithsmartnoiserejection,•High-speedCurrent-Sens

3、eAmplifierwithIdealsafedirectionreversal,andcross–conductionprotection.DiodeAlthoughspecifiedforoperationfrompowersuppliesbetween10V•Pulse-by-PulseandAverageCurrentSensingand18V,theUC1625cancontrolhighervoltagepowerdevices•Over-VoltageandUnder-VoltageProtectionwit

4、hexternallevel-shiftingcomponents.TheUC1625containsfast,high-currentpush-pulldriversforlow-sidepowerdevicesand50V•DirectionLatchforSafeDirectionReversalopen-collectoroutputsforhigh-sidepowerdevicesorlevelshifting•Tachometercircuitry.•TrimmedReferenceSources30mAThe

5、UC1625ischaracterizedforoperationoverthemilitarytem-peraturerangeof–55°Cto+125°C,whiletheUC2625ischarac-•ProgrammableCross-ConductionProtectionterizedfrom–40°Cto+105°CandtheUC3625ischaracterized•Two-QuadrantandFour-QuadrantOperationfrom0°Cto70°C.(NOTE:ESDProtectio

6、nto2kV)TYPICALAPPLICATION+5VTOHALL+15VVMOTORVREFSENSORS+3kΩ100nF100nF+100µF2N390420µF20µF10Ω10kΩ10kΩR3kΩ21911OSCQUAD33kΩ2N3906IRF9350223kΩDIR166TO1k17MOTOR1TOOTHERCHANNELS18100nF28UC36254kΩ14REQUIRED27TOOTHERFORBRAKECHANNELS13ANDFAST25REVERSE10Ω2200pFIRF53212COSC1

7、520BRAKE212632423891045710kΩ100nF3nF68kΩREQUIRED5nF100nFCTRFROM240ΩFORTHALLAVERAGE2nFSENSORS0.02ΩCURRENT5nF240ΩRSENSINGS2nF0.02Ω2nFRDUDG-99045SLUS353A-NOVEMBER1999UC1625UC2625UC3625ABSOLUTEMAXIMUMRATINGSCONNECTIONDIAGRAMVCCSupplyVoltage............................

8、..+20VPwrVCCSupplyVoltage..........................+20VDIL-28(TOPVIEW)PWMIn...................................–0.3to6VJorNPACKAGEE/AIN(+),E/AIN(–)......