On Semi公司的AMIS-30624是I2C接口的单片微步进马达驱动器，包括位置控制器和控制/诊断接口。马达控制部分采用微步进技术，无传感器停转检测，峰值电流高达800mA，固定频率PWM电流控制和可选择PWM频率，快慢衰减模式自动选择，12V/24V兼容，主要用在汽车电子，建筑物自动化如HVAC，监测，卫星天线，可再生能源等。本文介绍了AMIS-30624主要特性，方框图，应用电路以及评估板AM306244R1DBGEVB主要特性，电路图和材料清单。
The AMIS-30624 is a single-chip micro-stepping motor driver with a position controller and control/diagnostic interface. It is ready to build intelligent peripheral systems where up to 32 drivers can be connected to one I2C master. This significantly reduces system complexity.
The chip receives positioning instructions through the bus and subsequently drives the stator coils so the two-phase stepper motor moves to the desired position. The on-chip position controller is configurable (OTP or RAM) for different motor types, positioning ranges and parameters for speed, acceleration and deceleration. Micro-stepping allows silent motor operation and increased positioning resolution. The advanced motion qualification mode enables verification of the complete mechanical system in function of the selected motion parameters. The AMIS-30624 can easily be connected to an I2C bus where the I2C master can fetch specific status information like actual position, error flags, etc. from each individual slave node.
An integrated sensorless stall detection stops the motor when running into stall. This enables silent, yet accurate position calibrations during a referencing run and allows semi-closed loop operation when approaching the mechanical end-stops.
The chip is implemented in I2T100 technology, enabling both high voltage analog circuitry and digital functionality on the same chip. The AMIS-30624 is fully compatible with the automotive voltage requirements.

AMIS-30624主要特性：
Motor Driver
Micro-stepping technology
Sensorless stall detection
Peak current up to 800mA
Fixed frequency PWM current-control
Selectable PWM frequency
Automatic selection of fast and slow decay mode
No external fly-back diodes required
14V/24V compliant
Motion qualification mode
Controller with RAM and OTP memory
Position controller
Configurable speeds and acceleration
Input to connect optional motion switch
I2C interface
Bi-directional 2-wire bus for Inter IC Control
Field programmable node addresses
Full diagnostics and status information
Protection
Over-current protection
Under-voltage management
Open circuit detection
High-temp warning and management
Low-temp flag
EMI compatibility
High voltage outputs with slope control
HV outputs with slope control

AMIS-30624应用：
The AMIS-30624 is ideally suited for small positioning applications. Target markets include: automotive (headlamp alignment, HVAC, idle control, cruise control), industrial equipment (lighting, fluid control, labeling, process control, XYZ tables, robots) and building automation (HVAC, surveillance, satellite dish, renewable energy systems). Suitable applications typically have multiple axes or require mechatronic solutions with the driver chip mounted directly on the motor.

图1。AMIS-30624方框图

图2。AMIS-30624典型应用电路图

评估板AM306244R1DBGEVB
The AM306244R1DBGEVB is a form factor daughter board providing a complete solution driving bipolar stepper motors. In conjunction with the evaluation kit AMIS3062XGEVK it forms an I²C based solution turning high level commands from an I²C master in well defined motions. The design can be programmed to detect and act on mechanical blocking of the rotor. It also incorporates the lowest bill of materials, small board size and perfect matched thermal resistance allowing driving 800 mA at elevated ambient temperature.
Note: This board must be used with the AMIS3062XGEVK Industrial Stepper Motor Driver Kit.

图3。评估板AM306244R1DBGEVB外形图

评估板AM306244R1DBGEVB特性：
Low bill of materials
Small form factor (25mm x 24mm)
Plug and Play in combination with AMIS3062XGEVK
I²C interface
Microstepping (1/2, 1/4, 1/8, 1/16)
Peak current of 800mA
8V-29V supply voltage
Automotive compliant
Full diagnostics and status information
Position controller
Configurable speeds, acceleration and deceleration
Programmable hold and run current

评估板AM306244R1DBGEVB应用：
Flap control in HVAC systems
Headlamp Positioning systems
Pan - tilt - zoom function in Surveillance Camera
Mechatronic modules
X-Y-Z tables
Printers
Industrial robots
Pick-and-place machines
Dose pumps
Event lighting

图4。评估板AM306244R1DBGEVB电路图

评估板AM306244R1DBGEVB材料清单（BOM）：