8909 - Allegro MicroSystems

8909 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH BACK-EMF SENSING AND POWER DMOS OUTPUTS

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.

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 voltage for both the high-side and sink-side gate-drive circuits. This provides for optimal rDS(on) of sources and.