原标题：On Semi AMIS-30624 I2C微步进马达驱动方案

　　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

　　评估板AM306244R1DBGEVB材料清单(BOM)：