A3981KLPTR-T Allegro Microsystems Inc, A3981KLPTR-T Datasheet - Page 35

• Manufacturer Part Number: A3981KLPTR-T
• Description: AUTOMOTIVE PROGRAMMABLE STEPPER DRVR
• Manufacturer: Allegro Microsystems Inc

Specifications of A3981KLPTR-T

• Applications: Stepper Motor Driver, 2 Phase
• Number Of Outputs: 1
• Voltage - Load: 7 V ~ 28 V
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP (0.173", 4.40mm Width) Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

A3981
N
S
S
N
Figure A1. Basic principle of bipolar stepper motor operation
N
N
N
A
S
A
A
S
S
A
N
N
N
B
B
S
B
B
S
S
Rotor
A
S
N
S
A
A
N
S
N
A
_
_
_
_
Rotor
N
N
N
_
B
_
B
S
S
_
B
_
B
S
Stator
Stator
Stator
Stator
Rotor
N
N
N
A
S
A
A
S
S
A
Rotor
B
B
N
S
N
B
B
S
N
S
A
S
N
S
A
A
N
N
A
_
_
_
S
_
Automotive, Programmable Stepper Driver
N
N
N
B
B
S
S
B
B
S
_
_
_
_
N
S
N
S
A
A
A
A
B
B
B
B
(a)
• Phase A energized in positive direction
• Phase B not energized
Permanent magnet poles on the rotor aligned with
electromagnet poles on the stator
(b)
• Phase A not energized
• Phase B energized in positive direction
Rotor moves to the right to realign permanent
magnet poles on the rotor to the electromagnet
poles on the stator.
(c)
• Phase A energized in negative direction.
• Phase B not energized
Rotor moves to the right to realign permanent
magnet poles on the rotor to the electromagnet
poles on the stator.
(d)
• Phase A not energized.
• Phase B energized in negative direction
Rotor moves to the right to realign permanent
magnet poles on the rotor to the electromagnet
poles on the stator.
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
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