DESCRIPTION

The IC enables a μC to track the position of a DC-motor by counting its current ripples. The ripple signal is available on an output pin to connect controllers or dedicated logic. With the bidirectional interface the actual position can be read out and IC parameters can be changed. Main parameters are motor direction and PWM to control high side drivers. The IC can be adapted to different motor characteristics by changing the RC-filter on ODIF, IDIF, OLP and the voltage divider on BRTH.

FEATURES

? Supply voltage range VDD 9V to 16V

? Full motor control and diagnosis

? Driving a four N-channel-power-MOSFET full bridge

? Pulse width modulation with 8bit resolution for high side drivers

? Drive frequency 23 kHz

? Reduced current peaks during motor start and acceleration

? Active motor braking

? Motor position determined by sensing motor current fluctuations

? Shortcircuit and overvoltage protected outputs

? One pin microprocessor interface with automatic baud rate recognition

? Motor turned off automatically 200 ms after the last valid transmission

? Low standby current (typ. < 200 μA)

? – 40°C to + 125°C operating temperature

? SO20w package

APPLICATION

? Seat adjustment

? Steering column adjustment

? Fuel pump