A1441 Datasheet, PDF (1/4 Pages) Allegro MicroSystems – Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation

A1441
Low-Voltage Full-Bridge Brushless DC Motor Driver
with Hall Element Commutation
Package EL, 6-pin Surface Mount MLP
6
5
4
1
2
3
Package EL
2 × 2 mm
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 integra-
tion 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 incor-
porated 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.
Approximate Actual Size
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V_DD ......................................... 5.0 V
Reverse Battery Voltage, V_RDD....................... –0.3 V
Output Voltage, V_OUT ............–0.3 V to V_DD + 0.3 V
Control Input Voltage,V_IN(High) –0.3 V to V_DD + 0.3 V
Load Current*, I_LOAD ............................... ±150 mA
Magnetic Flux Density, B ........................ Unlimited
Operating Temperature
Ambient, T_A, Range S .................. –20ºC to 85ºC
Maximum Junction, T_J(max)........................165ºC
Storage Temperature, T_S .................. –65ºC to 170ºC
*Positive I_LOAD flow is from VOUT1 to VOUT2.
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
Use the following complete part numbers when ordering:
Part Number
Package
Packing
A1441SELLT-T
2×2×0.50 mm
7-in. Reel, 3000 pieces/reel
A1441-DS
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com