AMIS-30621 Datasheet, PDF (1/43 Pages) AMI SEMICONDUCTOR – LIN Microstepping Motordriver

AMIS-30621 LIN Microstepping Motordriver
Data Sheet
General Description
The AMIS-30621 is a member of a stepper motordriver
family with position controller and control/diagnostics
interface integrated in one single chip.
The family consists of two products:
• AMIS-30621 with LIN interface, ready to build dedicated
mechatronics solutions connected remotely with a LIN
master.
• AMIS-30622 with SERIAL interface, ready to act as
peripheral device next to a microcontroller.
Features
The chip receives high-level positioning instructions through
the interface and subsequently drives the motor coils until
the desired position is reached. The on-chip position
controller is configurable (OTP and Interface) for different
motor types, positioning ranges and parameters for speed,
acceleration, and deceleration.
The AMIS-30621 acts as a slave on the bus and the master
can fetch specific status information like actual position,
error flags, etc. from each individual slave node.
Motordriver
• Microstepping (1/2, 1/4, 1/8, 1/16)
• Low resonance & noise
• High resolution
• Programmable peak current up to 800mA
• 20kHz PWM current-control
• Automatic selection of fast & slow decay mode
• Internal fly-back FETs
• Fully integrated current sense
• 8V-29V supply voltage
• Automotive compliant
• Full diagnostics and status information
Controller with RAM and OTP Memory
• Position controller
• Configurable speeds, acceleration and deceleration
• Flexible hold-current
• Movement/position sensor-input
• Optional stall detection
Applications and Benefits
LIN Interface
• Physical - and data-link-layer (conform to LIN rev. 1.3)
• Dynamically allocated indentifiers
• Up to 128 node addresses
Protection
• Over-current protection
• Under-voltage management
• Over-voltage protection
• High-temp warning and shutdown
• Low-temp warning
• LIN bus short-circuit protection to supply & ground
Power Saving
• Power-down supply current <50µA
• 5V regulator with wake-up on LIN activity
EMI compatibility
• Power drivers with slope control
The AMIS-30621 is ideally suited for small positioning
applications. Target markets include: automotive (headlamp
alignment, HVAC, idle control, cruise), industrial equipment
(lighting, fluid control, labeling, process, XYZ tables) and
building automation (HVAC, surveillance, satellite dish
positioning). Suitable applications typically have multiple
axes or require mechatronic solutions with the driver chip
mounted directly on the motor.
The high abstraction level of the products’ 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 effecting the
Ordering Information
demands on the master microcontroller. The 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. The stall-
detection feature (optional) offers silent, yet accurate
position-calibrations during the referencing run and allows
semi-closed loop operation when approaching the
mechanical end-stops.
All these benefits result in reduced system-cost and time-
to-market and improved technical performance.
Part N° AMIS-30621
Package SOIC-20
Peak Current 800mA
Temp. Range -40°C…125°C
AMI Semiconductor - Rev. 1.4
www.amis.com
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