onsemi AMIS30624C6244RG

The AMIS−30624/NCV70624 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/NCV70624 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 step−loss detection prevents the positioner from loosing steps and 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 NCV70624 is fully compatible with the automotive voltage requirements.

• Micro−Stepping Technology
• Sensorless Step−Loss Detection
• Peak Current Up to 800 mA
• Fixed Frequency PWM Current−Control
• Selectable PWM Frequency
• Automatic Selection of Fast and Slow Decay Mode
• No external Fly−back Diodes Required
• 14 V/24 V Compliant
• Motion Qualification Mode
• Position Controller
• Configurable Speeds and Acceleration
• Input to Connect Optional Motion Switch
• Bi−Directional 2−Wire Bus for Inter IC Control
• Field Programmable Node Addresses
• Full Diagnostics and Status Information
• Overcurrent Protection
• Undervoltage Management
• Open−circuit Detection
• High Temperature Warning and Management
• Low Temperature Flag
• High Voltage Outputs with Slope Control
• US 7,271,993
• US 7,288,956
• This is a Pb−Free Device
• NCV Prefix for Automotive and Other Applications Requiring Site and Control Changes

• Small positioning applications
• Automotive (headlamp alignment, HVAC, idle control, cruise control)
• Industrial equipment (lighting, fluid control, labeling, process control, XYZ tables, robotics)
• Building automation (HVAC, surveillance, satellite antennas, renewable energy systems)