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3971 Datasheet(PDF) 2 Page - Allegro MicroSystems

Part # 3971
Description  DUAL DMOS FULL-BRIDGE DRIVER
PDF  8 Pages
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

3971 Datasheet(HTML) 2 Page - Allegro MicroSystems

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3971
DUAL DMOS
FULL-BRIDGE DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
FUNCTIONAL BLOCK DIAGRAM
Copyright © 2000, Allegro MicroSystems, Inc.
BRIDGE 1
CONTROL
LOGIC
VOLTAGE
REFERENCE
UVLO &
THERMAL
SHUTDOWN
OUT
2A
SENSE
2
GATE
DRIVE
CHARGE PUMP
CP1
CP2
V
CP
V
BB2
S
20
S
21
OUT
2B
0.22
µF/100 V
V
DD
DMOS H-BRIDGE
0.22
µF
50 V
OUT
1A
V
BB1
OUT
1B
DMOS H-BRIDGE
SENSE
1
VCP
GROUND
S
10
S
11
PWM
1
PWM
2
V REF
LOW SIDE SUPPLY
BRIDGE 2
CONTROL
LOGIC
LGND
(OPTIONAL)
(OPTIONAL)
LOAD
SUPPLY
R
S,
C
S
R
S
, C
S
LOGIC
SUPPLY
Dwg. FP-050
24
3
10
11
22
15
23
2
8
9
4
5
17
16
21
20
14
12
13
6
7
18 19



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