Datasheet4U Logo Datasheet4U.com

A8909CLB Datasheet 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER

Manufacturer: Allegro MicroSystems

📥 Download Datasheet

Overview

8909 ADVANCE INFORMATION DATA SHEET 3-PHASE BRUSHLESS DC MOTOR (Subject to change without notice) CONTROLLER/DRIVER WITH BACK-EMF SENSING April 3, 1995 AND POWER DMOS OUTPUTS 8909 Data Sheet 26301.10 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING AND POWER DMOS OUTPUTS SUPPLY OSC C OSC R LDC V BH V BL GND GND CLOCK LOAD SCLK 1 2 3 4 5 6 7 8 9 10 VDD 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VM C TAP OUTC BRAKE FCOM OUTB GND GND R SENSE BKDELAY ERRCAP OUTA The 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 monolithic chip.

It provides complete back-EMF sensing, commutation control, and drive of a spindle motor, and provides for an orderly spindown 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.

Key Features

  • digital adaptive commutation delay, programmable digital commutation timers, and minimal micro overhead during startup. This results in enhanced resynchronization during a power fault followed by a restart. EXCOMM D E N U RE N E I T F N E O R C R S I O D F.
  • 11 DATA 12 13 VICMD VM AMUX 14 P O R D U T C N E C O Y L Dwg. PP-063 A serial peripheral interface provides control of programmable features and mode switches. An onboard dc-to-dc converter provides regulated boost voltag.

More Datasheets from Allegro MicroSystems

Part Number Description
A8902 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER
A8902CLBA 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER
A8904 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER
A8905CLB 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER
A8906CLB BIDIRECTIONAL 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER
A8920SLR DUAL SCHOTTKY DIODE
A8925 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER
A8925CEB 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER
A8932CLWA VOICE-COIL MOTOR DRIVER
A8936CJT VOICE COIL MOTOR DRIVER