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Related Links:

Datasheets:
A1441: Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation (PDF)

Selection Guides:
BLDC Motor Drivers with Integrated Hall for Commutation

when this product is updated

FAQs:
A1441: Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation

Press Releases:
A1441: Allegro MicroSystems, Inc. Introduces Full-Bridge Motor Driver, Providing Integration of Hall Element and Motor Control Circuitry

A1441 Datasheet Addendum (PDF)

A1441
Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation

These parts are in production but have been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available. Date of status change: November 1, 2008.

Features and Benefits

• Single-chip solution for high reliability
• Chopper stabilization technique for precise signal response over operating range
• 2.0 to 4.0 V operation
• Sleep mode pin allowing external logic signal enable/disable to reduce average power consumption
• Restart feature
• Small package size

Description

The A1441 is a full-bridge motor driver designed to drive low-voltage bipolar brushless dc motors. Commutation of the motor is achieved by use of a single Hall element sensor to detect the position of an alternating-pole ring magnet. A high density merged Bipolar-CMOS semiconductor process allows the integration of the Hall element on the same IC as the motor control circuitry, providing a single-chip solution for enhanced reliability. All necessary circuitry is incorporated within the device package, eliminating the need for any external support components.

A micropower sleep mode can be enabled by an external signal, to reduce current consumption for battery management in portable electronic devices. In addition, the device offers an active function for motor braking.

The A1441 is optimized for vibration motor applications such as cellular phones, pagers, electronic toothbrushes, and hand-held video game controllers. These devices also drive low power fan motors designed with cogging plates.

The small package outline and low profile make this device ideally suited for use in applications where printed circuit board area and component headroom are at a premium. It is available in a lead (Pb) free (leadframe plating 100% matte tin) 6-pin MLP microleadframe package for surface mount, with exposed pad for enhanced thermal dissipation.

Functional Block Diagram

Complete Part Numbers

Part Number	Package Type	RoHS Compliant	Part Composition/ RoHS Data	Temperature	Comments	Samples	Distributor Stock
A1441EELLT-T	6-lead MLP	Yes	view data	-40 °C to  85 °C	not for new design	samples not available

Allegro's products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system.