AMIS--30532
Micro--Stepping Motor
Driver
Introduction
The AMIS--30532 is a micro--stepping stepper motor driver for
bipolar stepper motors. The chip is connected through I/O pins and an
SPI interface with an external microcontroller. It has an on--chip
voltage regulator, reset--output and watchdog reset, able to supply
peripheral devices. The AMIS--30532 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--30532 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.
http://onsemi.com
NQFP--32, 7x7
CASE 560AA
The AMIS--30532 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.
MARKING DIAGRAM
Key Features
• Dual H--Bridge for 2--Phase Stepper Motors
• Programmable Peak--Current up to 1.6 A Continuous† (3.0 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
C532--001 = Specific Device Code
XXXX
Y
= Date Code
= Assembly Location
= Traceability Code
ZZ
• 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
ORDERING INFORMATION
Seedetailedorderingandshippinginformationinthepackage
dimensions section on page 27 of this data sheet.
• 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.
©
Semiconductor Components Industries, LLC, 2009
1
Publication Order Number:
October, 2009 -- Rev. 0
AMIS--30532/D
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