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Approximate Scale 1:1

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

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Package: 6 Contact MLP/DFN/SON (suffix EL)