3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING AND POWER DMOS OUTPUTSThe A8909CLB is a three-phase brushless, back-EMF sensing,
spindle-motor driver that integrates Analog bipolar, Analog and digital
CMOS control functions, and DMOS power outputs on a single mono-
lithic chip. It provides complete back-EMF sensing, commutation
control, and drive of a spindle motor, and provides for an orderly spin-
down in the event of supply-voltage removal. Energy for retracting the
heads is regenerated from the spinning motor, while a controlled delay
allows for a full retract before dynamic braking. The pulse-width
modulation system and power DMOS outputs provide control of high
currents with minimum power dissipation in the chip, and minimal
average power supply currrent.
UED PRODUCT
REFERENCE ONL By Allegro MicroSystems, Inc.
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A8909CLB Pb-Free | A8909CLB Cross Reference | A8909CLB Schematic | A8909CLB Distributor |
A8909CLB Application Notes | A8909CLB RoHS | A8909CLB Circuits | A8909CLB footprint |