AMIS-30542 Datasheet, PDF (1/29 Pages) ON Semiconductor – AMIS-30542 Micro-Stepping Motor Driver

AMIS-30542
AMIS-30542 Micro-Stepping
Motor Driver
Introduction
The AMIS−30542 is a micro−stepping stepper motor driver for
bipolar stepper motors. The chip is connected through I/O pins and a
SPI interface with an external microcontroller. It has an on−chip
voltage regulator, reset−output and watchdog reset, able to supply
peripheral devices. AMIS−30542 contains a current−translation table
and takes the next micro−step depending on the clock signal on the
“NXT” input pin and the status of the “DIR” (=direction) register or
input pin. The chip provides a so−called “speed and load angle”
output. This allows the creation of stall detection algorithms and
control loops based on load−angle to adjust torque and speed. It is
using a proprietary PWM algorithm for reliable current control.
The AMIS−30542 is implemented in I2T100 technology, enabling
both high−voltage analog circuitry and digital functionality on the
same chip. The chip is fully compatible with the automotive voltage
requirements.
The AMIS−30542 is ideally suited for general−purpose stepper
motor applications in the automotive, industrial, medical, and marine
environment. With the on−chip voltage regulator it further reduces the
BOM for mechatronic stepper applications.
Key Features
• Dual H−Bridge for 2−Phase Stepper Motors
• Programmable Peak−Current Up to 2.2 A Continuous† (5 A Short
Time) Using a 5−bit Current DAC
• On−Chip Current Translator
• SPI Interface
• Speed and Load Angle Output
• Seven Step Modes from Full Step Up to 32 Micro−Steps
• Fully Integrated Current−Sense
• PWM Current Control with Automatic Selection of Fast and Slow
Decay
• Low EMC PWM with Selectable Voltage Slopes
• Active Fly−Back Diodes
• Full Output Protection and Diagnosis
• Thermal Warning and Shutdown
• Compatible with 5 V and 3.3 V Microcontrollers
• Integrated 5 V Regulator to Supply External Microcontroller
• Integrated Reset Function to Reset External Microcontroller
• Integrated Watchdog Function
• These Devices are Pb−Free and are RoHS Compliant*
†Output current level may be limited by ambient temperature and heat sinking.
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
http://onsemi.com
NQFP−32, 7x7
CASE 560AA
MARKING DIAGRAM
C542−001 = Specific Device Code
XXXX = Date Code
Y
= Assembly Location
ZZ
= Traceability Code
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 27 of this data sheet.
© Semiconductor Components Industries, LLC, 2009
1
October, 2009 − Rev. 0
Publication Order Number:
AMIS−30542/D