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AMIS-30512 Datasheet, PDF (1/30 Pages) ON Semiconductor – Micro-Stepping Motor Driver | |||
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AMIS-30512
Micro-Stepping Motor Driver
Introduction
The AMISâ30512 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. It has an onâchip
voltage regulator, resetâoutput and watchdog reset, able to supply
peripheral devices. The AMISâ30512 contains a currentâtranslation
table and 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 AMISâ30512 is implemented in I2T100 technology, enabling
both highâvoltage analog circuitry and digital functionality on the
same chip. The chip is fully compatible with the automotive voltage
requirements.
The AMISâ30512 is ideally suited for generalâpurpose stepper
motor applications in the automotive, industrial, medical, and marine
environment.
Key Features
⢠Dual HâBridge for 2âphase Stepper Motors
⢠Programmable Peakâcurrent up to 800 mA Using a 5âbit Current
DAC
⢠Onâchip Current Translator
⢠SPI Interface
⢠Speed and Load Angle Output
⢠Seven Step Modes from Fullâstep up 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 Flyâback Diodes
⢠Full Output Protection and Diagnosis
⢠Thermal Warning and Shutdown
⢠Compatible with 3.3 V Microcontrollers, 5 V Tolerant Inputs
⢠Integrated 5 V Regulator to Supply External Microcontroller
⢠Integrated Reset Function to Reset External Microcontroller
⢠Integrated Watchdog Function
http://onsemi.com
PIN ASSIGNMENT
DO
VDD
GND
DI
CLK
NXT
DIR
ERR
SLA
CPN
CPP
VCP
(Top View)
TSTO
POR/WD
VBB
MOTXP
GND
MOTXN
MOTYN
GND
MOTYP
VBB
CS
CLR
ORDERING INFORMATION
Device
AMIS30512
Package
SOIC 24
Shipping
Tape & Reel
© Semiconductor Components Industries, LLC, 2008
1
September, 2008 â Rev. 1
Publication Order Number:
AMISâ30512/D
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