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ALLEGRO BLDC MOTOR DRIVER DOWNLOAD

The sensorless start-up scheme allows the A to operate over a wide range of motor and load combinations. Further information about Allegro can be found at www. This new development kit is targeted at both the industrial and consumer markets with end applications to include power tools, lawn and garden equipment, pumps, ticketing and ATM machines and household appliances. Motor operation is controlled by a programmable PWM input that can be used to define the motor operating state and provide the proportional input for the selected operating mode. Allegro MicroSystems, LLC is a leader in developing, manufacturing and marketing high-performance semiconductors.

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If larger loads are needed the A has jumpers that disable the onboard bridge and provide connections to add an external bridge. Several operational modes are available including duty-cycle voltage control, current torque limit control and closed loop speed control.

A4963: Sensorless BLDC Controller

Motor operation is controlled by a programmable PWM input that can be used to define the motor operating state allegrl provide the proportional input for the selected operating mode. Faults are indicated by a single open drain output than can be used to pull the PWM input low.

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This innovative control interface combined with on-chip blldc commutation makes it possible to efficiently control a BLDC motor with little or no micro processing power.

Operating mode and control parameters can be altered through an SPI compatible serial interface. The A evaluation kit is fully compliant to 50 V and includes everything needed to spin a motor – just provide a voltage supply and a motor and you will be able to see just how simple the A can be to control a BLDC motor with a simple analog voltage or direct PWM. Integrated diagnostics provide indication of under voltage, over temperature and power bridge faults and can protect the power switches under most short circuit conditions.

The A can be used as a stand-alone controller communicating directly with an electronic control unit ECU or it can be used in a close coupled system with a local microcontroller MCU. If this is not your local representative, find your local sales rep here.

Motor Driver and Interface ICs

The sensorless start-up scheme allows the A to operate over a wide range of motor allego load combinations. The motor is driven using block commutation trapezoidal drive where phase commutation is determined, without the need for independent position sensors, by monitoring the motor back- EMF bemf.

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Further information about Allegro can be found at www. Another feature on the evaluation board, which makes operation and evaluation simple, is the onboard 5 V regulator which creates the secondary supply for logic inputs.

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Allegro MicroSystems – Motor Driver and Interface ICs

We’ll notify you when there are updates to this product. This new development kit is targeted at both the industrial and consumer markets with end applications to include power tools, lawn and garden bldv, pumps, ticketing and ATM machines and household appliances.

Allegro MicroSystems, LLC is a leader in developing, manufacturing and marketing high-performance semiconductors.