Transcription of 3-Phase Brushless DC Motor Controller
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3-Phase Brushless DC Motor Controller
Si9979 vishay SiliconixDocument Number: 70012S-41209 Rev. E, Brushless DC Motor ControllerFEATURESHall-Effect Commutation60 or 120 Sensor SpacingIntegral High-Side Drive for all N-Channel MOSFETB ridgesPWM InputQuadrature SelectionTachometer OutputReversibleBrakingOutput Enable ControlCross Conduction ProtectionCurrent LimitingUndervoltage LockoutInternal Pull-Up ResistorsDESCRIPTIONThe Si9979 is a monolithic Brushless dc Motor Controller withintegral high-side drive circuitry. The Si9979 is configured toallow either 60or 120 commutation sensor spacing. Theinternal low-voltage regulator allows operation over a wideinput voltage range, 20- to 40-V Si9979 provides commutation from Hall-effect integral high-side drive, which utilizes combinationbootstrap/charge pump supplies, allows implementation of anall n-channel MOSFET 3-Phase bridge.
Si9979 Vishay Siliconix Document Number: 70012 S-41209—Rev. E, 21-Jun-04 www.vishay.com 1 3-Phase Brushless DC Motor Controller FEATURES Hall …
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