AMIS-30624 Datasheet, PDF (1/56 Pages) AMI SEMICONDUCTOR – I2C Microstepping Motordriver

1.0 General Description
AMIS-30624
I²C Micro-stepping Motor Driver
The AMIS-30624 is a single-chip micro-stepping motor driver with a position controller and control/diagnostic interface. It is ready to
build intelligent peripheral systems where up to 32 drivers can be connected to one I²C master. This significantly reduces system
complexity.
The chip receives positioning instructions through the bus and subsequently drives the stator coils so the two-phase stepper motor
moves to the desired position. The on-chip position controller is configurable (OTP or RAM) for different motor types, positioning ranges
and parameters for speed, acceleration and deceleration. Micro-stepping allows silent motor operation and increased positioning
resolution. The advanced motion qualification mode enables verification of the complete mechanical system in function of the selected
motion parameters. The AMIS-30624 can easily be connected to an I²C bus where the I²C master can fetch specific status information
like actual position, error flags, etc. from each individual slave node.
An integrated sensorless stall detection stops the motor when running into stall. This enables silent, yet accurate position calibrations
during a referencing run and allows semi-closed loop operation when approaching the mechanical end-stops.
The chip is implemented in I2T100 technology, enabling both high voltage analog circuitry and digital functionality on the same chip.
The AMIS-30624 is fully compatible with the automotive voltage requirements.
2.0 Product Features
Motor Driver
• Micro-stepping technology
• Sensorless stall detection
• Peak current up to 800mA
• Fixed frequency PWM current-control
• Selectable PWM frequency
• Automatic selection of fast and slow decay mode
• No external fly-back diodes required
• 14V/24V compliant
• Motion qualification mode
Controller with RAM and OTP memory
• Position controller
• Configurable speeds and acceleration
• Input to connect optional motion switch
I²C interface
• Bi-directional 2-wire bus for Inter IC Control
• Field programmable node addresses
• Full diagnostics and status information
Protection
• Over-current protection
• Under-voltage management
• Open circuit detection
• High-temp warning and management
• Low-temp flag
EMI compatibility
• High voltage outputs with slope control
• HV outputs with slope control
©2008 SCILLC. All rights reserved.
June 2008 – Rev. 4
Publication Order Number:
AMIS30624/D