AMI Semiconductor
AMIS-30622 Stepper Motordriver & Controller
with I
2
C Bus & Microstepping Features
Key Features
Motordriver
• Microstepping (1/2, 1/4, 1/8, 1/16)
• Programmable peak current up to 800mA
• 20kHz PWM current control
• Automatic selection of fast and slow decay mode
• Internal fly-back FETs
• Fully integrated current sense
• 8V-29V supply voltage
• Automotive compliant
• Full diagnostics and status information
• 5V reference voltage pin
Programmable Controller
• Position controller
• Configurable speeds, acceleration and deceleration
• Programmable hold current
• Programmable 'safe position'
• Customized default setting in non-volatile memory
(OTP)
• Movement/position sensor input
Protection and Diagnostics
• Over-current protection
• Under-voltage management
• Over-voltage protection
• High-temp warning and shutdown
• Low-temp warning
• Detection of open and shorted motor coils
• Management of safe position
AMIS-30622
-
Stepper Motordriver & Controller Feature Sheet
Serial Bus Interface
• 2-wire I
2
C serial interface
• 5V microcontroller compatible
• Up to 32 node addresses
EMI Compatibility
• Power drivers with slope control
Product Description
The AMIS-30622 is a stepper motordriver with position
controller and control/diagnostics interface integrated in
one single chip.
The product is ready to be connected as a peripheral
device to a microcontroller with minimal loading of the
microcontroller. The chip receives high level positioning
instructions through the I²C interface and subsequently
drives the motor coils until the desired position is reached.
The on-chip position controller is configurable for different
motor types, positioning ranges and parameters for
speed, acceleration, deceleration, hold current, safe
position. Six OTP bytes are available to set default values,
and can be overruled by values programmed through the
I
2
C bus.
The AMIS-30622 acts as a slave on the serial bus and the
master can fetch specific status information like actual
position, error flags, etc. from each individual slave node.
Applications and Benefits
The AMIS-30622 is ideally suited for small positioning
applications. Target markets include automotive, industrial
equipment and building automation. Applications of
interest have typically multiple axes.
The high abstraction level of the product’s command set
reduces the load of the processor on the master side.
Scaling of the application towards number of axes is
straight-forward: hardware and software designs are
extended in a modular way, without severely affecting the
demands on the master microcontroller. The I
2
C bus
structure simplifies PCB track-layout and/or wiring
architectures.
Microstepping operation removes the design trade-off
between minimal operation speed and avoiding the risk of
noise and step loss due to resonance phenomena.
All these benefits result in reduced system cost and time-
to-market and improved technical performance.
Ordering Codes
Part N°
AMIS-30622-AGA
AMIS-30622-ANA
AMIS-30622
-
-
Stepper Motordriver & Controller Feature Sheet
AMIS-30622
Stepper Motordriver & Controller Feature Sheet
Package
SOIC-20
NQFP-32
(7mm x 7mm)
Peak Current Ambient
Ordering Code - Tube
at Max. Temp. Temperature
800mA
800mA
-40°C...125°C
-40°C...125°C
0C622-003-XTD
0C622-004-XTD
Ordering Code - Tape
0C622-003-XTP
0C622-004-XTP
Functional Block Diagram
SWI
I
2
C
I
2
C
Interface
Position
Controller
MOTXP
PWM
regulator
X
+
HW
Controller
TST
-
I -Sense
MOTXN
Decoder
Main Control
Registers
OTP - ROM
Sinewave
Table
DAC's
1 MHz
Vref
Temp
sense
Oscillator
PWM
regulator
Y
MOTYP
Voltage Regulator
Charge Pump
+
-
I -Sense
MOTYN
VBB
VDD
CPN CPP VCP
GND
Typical Application
220 nF
100 nF
V
BAT
C
1
220 nF
CPN
VDD
9
3
C
4
100
µF
C
3
CPP
10
11
C
5
VBB
12
C
6
VBB
100 nF
VCP
19
20
SWI
1
µF
C
2
SDA
1
18
MOTXP
MOTXN
I
2
C
bus
AMIS-30622
SCK
2
16
M
15
MOTYP
MOTYN
Connect
to V
BAT
or GND
R
1
HW
8
5
6
4
7
14
17
13
1 kΩ
TST1
TST2
GND
PC20070111.7
AMI Semiconductor
www.amis.com
Devices sold by AMIS are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. AMIS makes no warranty, express, statutory, implied or
by description, regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. AMIS makes no warranty of merchantability
or fitness for any purposes. AMIS reserves the right to discontinue production and change specifications and prices at any time and without notice. AMI Semiconductor's products
are intended for use in commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as
military, medical life-support or life-sustaining equipment, are specifically not recommended without additional processing by AMIS for such applications.
Copyright ©2007 AMI Semiconductor, Inc. M-20654-001 AP
京公网安备 11010802033920号
EEWORLD
