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ON Semiconductor collaborates with Stegia to bring ultra small smart motor solutions to market

June 29, 2011 // Paul Buckley

ON Semiconductor collaborates with Stegia to bring ultra small smart motor solutions to market

ON Semiconductor and leading Nordic motor supplier Stegia have announced that ON Semiconductor’s AMIS-30624 2-phase stepper motor driver, with built-in position controller and I2C serial interfacing, has been incorporated into Stegia’s stepper motor product line. This enables the creation of highly compact motor systems with next generation functionality.


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The AMIS-30624s on-chip position controller is fully configurable, offering a high degree of flexibility. The device is able to accommodate different motor types, positioning ranges, and speed/acceleration parameters. Its sensor-less stall detection feature can be used to identify blocked rotor and end of run conditions, preventing the motor from going into stall. The devices dimensions and high power density mean that it can be used with even the smallest models in the Stegia stepper motor portfolio, which go down to diameters of 6 mm.

Commands for controlling the acceleration, deceleration, position and speed of the motor are carried out through the AMIS-30624s I2C interface in microsteps. This results in silent motor operation, as well as enhancing positioning resolution. A stream of valuable diagnostic data can also be sent back to the motor systems host controller via the I2C interface.

Utilisation of an I2C interface limits the amount of cabling to the motor, thereby reducing bill of materials costs and lowering the systems overall electromagnetic radiation level. It is possible to connect up to 32 drivers to one I2C master, so that system complexity can be kept to a minimum.

The AMIS-30624 has a peak current of 800 mA and is fully compatible with automotive voltage requirements, with supply voltages of 8 V to 29 V being supported. Its operational temperature range of -40 to 125 C allows it to be employed in automotive and industrial environments.

This highly integrated device is optimised for use in any electromechanical system that requires precise, high reliability positional control, such as damper control systems for building automation, remote access control for hotel rooms, remote tuning of cellular base stations, vehicle headlamp positioning systems, and surveillance systems (pan-tilt-zoom cameras), as well as automotive, residential, and commercial comfort systems.
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