A3989_V データシートの表示（PDF） - Allegro MicroSystems
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A3989_V Datasheet PDF : 13 Pages
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A3989
Bipolar Stepper and High Current DC Motor Driver
VDD
OSC
PHASE1
I01
I11
PHASE2
I02
I12
Sense1
VREF1
3
VREF2
3
Sense 2
PHASE3
ENABLE
MODE
Sense 3
VREF3
3
Functional Block Diagram
0.1 μF
50 V
CHARGE PUMP
Control Logic
Stepper Motor
PWM Latch
BLANKING
PWM Latch
BLANKING
0.1 μF
50 V
DMOS
Full Bridge 1
VBB1
100 μF
50 V
0.22 μF
50 V
To
VBB2
VCP
OUT1A
OUT1B
GATE
DRIVE
DMOS
VBB1
Full Bridge 2
SENSE1
RS1
OUT2A
OUT2B
VCP
Control Logic
DC Motor
PWM Latch
BLANKING
GATE
DRIVE
Sense 2
Sense 3
DMOS
Full Bridge 3
SENSE2
RS2
OUT3A
OUT3A
OUT3B
OUT3B
SENSE3
SENSE3
RS3
Allegro MicroSystems, LLC
3
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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