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3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH LINEAR CURRENT CONTROL AND POWER DMOS OUTPUTS

The A8925CEB is a DMOS three-phase brushless dc motor controller/driver designed for use in Winchester disk drives and other data storage applications. The power output stages are capable of ±4 A output currents and have DMOS power outputs with less than 0.25 ? rDS(on)for low power dissipation. Intrinsic ground clamp and flyback diodes protect the output drivers when switching inductive loads. Thermal shutdown circuitry is provided to protect the device from excessive junction temperature.

FEATURES

■DMOS Outputs

■Low rDS(on)- 0.25 ?Maximum

■Linear Current Control

■Internal Commutation Circuitry

■Internal Current Sensing

■Thermal Shutdown Circuitry

■Under Voltage Detection Circuitry

■Fault Output Flag

■Power Surface-Mount Package