The A8906CLB is a bidirectional three-phase brushless dc motor controller/driver. The three half-bridge outputs are low on-resistance nchannel DMOS devices capable of driving up to 1 A. The A8906CLB provides complete, reliable, self-contained back-EMF sensing motor startup and running algorithms. A programmable digital frequency locked loop speed control circuit together with the linear current control circuitry provides precise motor speed regulation.

FEATURES

■ DMOS Outputs

■ Low rDS(on)

■ Startup Commutation Circuitry

■ Back-EMF Commutation Circuitry

■ Direction Control

■ Serial Port Interface

■ Frequency-Locked Loop Speed Control

■ Sector Data Tachometer Signal Input

■ Programmable Start-Up Current

■ Diagnostics Mode

■ Sleep Mode

■ Linear Current Control

■ Internal Current Sensing

■ Dynamic Braking Through Serial Port

■ Power-Down Dynamic Braking

■ System Diagnostics Data Out

■ Data Out Ported in Real Time

■ Internal Thermal Shutdown Circuitry