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AMIS-30521 Datasheet, PDF (1/28 Pages) AMI SEMICONDUCTOR – Micro-stepping Motor Driver | |||
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AMIS-30521, NCV70521
AMIS-30521/NCV70521
Micro-Stepping Motor
Driver
Introduction
The AMISâ30521/NCV70521 is a microâstepping stepper motor
driver for bipolar stepper motors. The chip is connected through I/O
pins and a SPI interface with an external microcontroller. The
AMISâ30521/NCV70521 contains a currentâtranslation table. It takes
the next microâstep depending on the clock signal on the âNXTâ input
pin and the status of the âDIRâ (= direction) register or input pin. The
chip provides a soâcalled âSpeed and Load Angleâ output. This allows
the creation of stall detection algorithms and control loops based on
loadâangle to adjust torque and speed. It is using a proprietary PWM
algorithm for reliable current control.
The AMISâ30521/NCV70521 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 521 is ideally suited for general purpose stepper motor
applications in the automotive, industrial, medical and marine
environment. The AMISâ30521 is intended for use in industrial
applications. The NCV70521 version is qualified for use in
automotive applications.
Features
⢠Dual HâBridge for 2 Phase Stepper Motors
⢠Programmable PeakâCurrent Up to 1.2 A Continuous (1.5 A Short
Time), Using a 5âBit Current DAC
⢠OnâChip Current Translator
⢠SPI Interface
⢠Speed and LoadâAngle Output
⢠7 Step Modes from Full Stepâup to 32 MicroâSteps
⢠Fully Integrated CurrentâSense
⢠PWM Current Control with Automatic Selection of Fast and Slow
Decay
⢠Low EMC PWM with Selectable Voltage Slopes
⢠Active Flyback Diodes
⢠Full Output Protection and Diagnosis
⢠Thermal Warning and Shutdown
⢠Digital IOâs Compatible with 5 V and 3.3 V Microcontrollers
⢠NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
⢠These are PbâFree Devices*
*For additional information on our PbâFree strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
http://onsemi.com
PINOUT
32 31 30 29 28 27 26 25
GND 1
DI 2
CLK 3
NXT 4
DIR 5
ERR 6
SLA 7
8
24 GND
23 GND
22 MOTXN
21 MOTXN
20 MOTYN
19 MOTYN
18 GND
17 GND
9 10 11 12 13 14 15 16
PC20070309.2
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 26 of this data sheet.
© Semiconductor Components Industries, LLC, 2009
1
May, 2009 â Rev. 1
Publication Order Number:
AMISâ30521/D
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