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AMIS-30521 Datasheet

Micro-Stepping Motor Driver

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AMIS-30521, NCV70521
Micro-Stepping Motor Driver
Introduction
The AMIS30521/NCV70521 is a microstepping stepper motor
driver for bipolar stepper motors. The chip is connected through I/O
pins and a SPI interface with an external microcontroller. The
AMIS30521/NCV70521 contains a currenttranslation table. It takes
the next microstep 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 socalled “Speed and Load Angle” output. This allows
the creation of stall detection algorithms and control loops based on
loadangle to adjust torque and speed. It is using a proprietary PWM
algorithm for reliable current control.
The AMIS30521/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 AMIS30521 is intended for use in industrial
applications. The NCV70521 version is qualified for use in
automotive applications.
Features
Dual HBridge for 2 Phase Stepper Motors
Programmable PeakCurrent Up to 1.2 A Continuous (1.5 A Short
Time), Using a 5Bit Current DAC
OnChip Current Translator
SPI Interface
Speed and LoadAngle Output
7 Step Modes from Full Stepup to 32 MicroSteps
Fully Integrated CurrentSense
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 IO’s Compatible with 5 V and 3.3 V Microcontrollers
NCV Prefix for Automotive and Other Applications Requiring Site
and Control Changes
These are PbFree Devices*
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.
*For additional information on our PbFree strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2009
December, 2009 Rev. 2
1
Publication Order Number:
AMIS30521/D


  ON Semiconductor Electronic Components Datasheet  

AMIS-30521 Datasheet

Micro-Stepping Motor Driver

No Preview Available !

AMIS30521, NCV70521
Table of Contents
Page
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . 4
Thermal Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Equivalent Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Package Thermal Characteristics . . . . . . . . . . . . . . . . . . . . 5
Electrical Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Recommended Operation Conditions . . . . . . . . . . . . . . . . 5
Typical Application Schematic . . . . . . . . . . . . . . . . . . . . . . 10
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
SPI Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
http://onsemi.com
2


Part Number AMIS-30521
Description Micro-Stepping Motor Driver
Maker ON Semiconductor
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AMIS-30521 Datasheet PDF






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