AMIS-30624, NCV70624
I2C Micro-stepping Motor
Driver
INTRODUCTION
The AMIS−30624/NCV70624 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
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32 drivers can be connected to one I 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.
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/NCV70624 can
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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.
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The chip is implemented in I2T100 technology, enabling both high
voltage analog circuitry and digital functionality on the same chip.
The NCV70624 is fully compatible with the automotive voltage
requirements.
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
PRODUCT FEATURES
Motor Driver
Field Programmable Node Addresses
Full Diagnostics and Status Information
Micro−Stepping Technology
Sensorless Step−Loss Detection
Peak Current Up to 800 mA
Fixed Frequency PWM Current−Control
Selectable PWM Frequency
Automatic Selection of Fast and Slow Decay Mode
No external Fly−back Diodes Required
14 V/24 V Compliant
Protection
Overcurrent Protection
Undervoltage Management
Open−circuit Detection
High Temperature Warning and Management
Low Temperature Flag
EMI Compatibility
Motion Qualification Mode (Note 1)
Controller with RAM and OTP Memory
High Voltage Outputs with Slope Control
Patents
Position Controller
US 7,271,993
US 7,288,956
Configurable Speeds and Acceleration
Input to Connect Optional Motion Switch
I2C Interface
This is a Pb−Free Device
NCV Prefix for Automotive and Other Applications
Requiring Site and Control Changes
Bi−Directional 2−Wire Bus for Inter IC Control
1. Not applicable for “Product Versions NCV70624DW010G, NCV70624DW010R2G”
Semiconductor Components Industries, LLC, 2009
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Publication Order Number:
September, 2009 − Rev. 5
AMIS−30624/D