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A1441 Datasheet(PDF) 1 Page - Allegro MicroSystems

Part No. A1441
Description  Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A1441 Datasheet(HTML) 1 Page - Allegro MicroSystems

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Low-Voltage Full-Bridge Brushless DC Motor Driver
with Hall Element Commutation
A1441
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.
1441-DS, Rev. 2
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
Functional Block Diagram
Continued on the next page…
Package: 6 Contact MLP/DFN/SON (suffix EL)


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