AMIS-30624 I
2
C Microstepping Motordriver
Data Sheet
1.0 General Description
The AMIS-30624 is a single-chip microstepping motordriver 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 I
2
C 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. Microstepping 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
2
2
motion parameters. The AMIS-30624 can easily be connected to an I C bus where the I C master can fetch specific status information
like actual position, error flags, etc. from each individual slave node.
An integrated sensorless step-loss detection prevents the positioner from loosing steps and 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
Motordriver
•
Microstepping technology
•
Sensorless step-loss 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
I
2
C 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
AMI Semiconductor
– Apr. 2007, Rev 3.1, M-20664-003
www.amis.com
1
AMI [ AMI SEMICONDUCTOR ]
