AMIS-30511 Datasheet, PDF (1/28 Pages) ON Semiconductor – Micro-Stepping Motor Driver

AMIS-30511
Micro-Stepping Motor Driver
Introduction
The AMIS−30511 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. The AMIS−30511
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, step loss detection, 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−30511 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−30511 is ideally suited for general−purpose stepper
motor applications in the automotive, industrial, medical, and marine
environment.
Key Features
• Dual H−Bridge for 2−phase Stepper Motors
• Programmable Peak−current up to 800 mA 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 3.3 V Microcontrollers, 5 V Tolerant Inputs
• −40°C to 125°C Temperature Range at 800 mA Peak Current
http://onsemi.com
PIN ASSIGNMENT
DO
VDD
GND
DI
CLK
NXT
DIR
ERR
SLA
CPN
CPP
VCP
(Top View)
TSTO
VBB
MOTXP
GND
MOTXN
MOTYN
GND
MOTYP
VBB
CS
CLR
ORDERING INFORMATION
Device
AMIS30511
Package
SOIC 24
Shipping
Tape & Reel
© Semiconductor Components Industries, LLC, 2008
1
September, 2008 − Rev. 1
Publication Order Number:
AMIS−30511/D