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A3988 Datasheet(HTML) 3 Page - Allegro MicroSystems

Part No. A3988
Description  Quad DMOS Full Bridge PWM Motor Driver
Download  13 Pages
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Maker  ALLEGRO [Allegro MicroSystems]
Homepage  http://www.allegromicro.com
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A3988 Datasheet(HTML) 3 Page - Allegro MicroSystems

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Quad DMOS Full Bridge PWM Motor Driver
A3988
3
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Functional Block Diagram
CHARGE PUMP
DMOS
FULL-BRIDGE 1
DMOS
FULL-BRIDGE 2
DMOS
FULL-BRIDGE 4
DMOS
FULL-BRIDGE 3
V
CP
To
V
BB2
PHASE1
I01
I11
SENSE1
OUT1B
OUT1A
SENSE2
OUT2B
OUT2A
VDD
OSC
SENSE4
OUT4B
OUT4A
SENSE3
OUT3B
OUT3A
VBB2
Sense2
Sense3
Sense4
PWM Latch
BLANKING
PWM Latch
BLANKING
VREF2
GATE
DRIVE
V
CP
Sense1
Sense2
PWM Latch
BLANKING
PWM Latch
BLANKING
Bridges 1 and 2
Control Logic
3
GATE
DRIVE
PHASE2
3
VREF1
VREF4
Sense3
Sense4
3
3
VREF3
I02
I12
PHASE3
I03
I13
PHASE4
I04
I14
VBB2
VBB1
VBB1
0.1 μF
50 V
100 μF
50 V
0.22 μF
50 V
0.1 μF
50 V
Bridges 3 and 4
Control Logic


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