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3971 Datasheet(PDF) 4 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) 4 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
Logic Truth Table
PWM
x
S
x0
S
x1
OUT
xA
OUT
xB
Function
X
0
0
Z
Z
Disable
001L
H
Forward
0
1
0
H
L
Reverse
011LL
Synchronous
101LL
Rectification/
111LL
Slow Decay
110LL
Chop
Terminal List
Terminal
Name
Description
1
NC
No (Internal) connection
2
LGND
Logic ground
3S
10
Control input, bridge 1
4
OUT
1A
Output A, bridge 1
5V
BB1
Load supply voltage, bridge 1
6, 7
GND
Ground
8
SENSE
1
Sense resistor, bridge 1
9
OUT
1B
Output B, bridge 1
10
S
11
Control input, bridge 1
11
PWM
1
Control input, bridge 1
12
CP1
Charge-pump capacitor
13
CP2
Charge-pump capacitor
14
V
CP
Reservoir capacitor
15
S
21
Control input, bridge 2
16
OUT
2B
Output B, bridge 2
17
SENSE
2
Sense resistor, bridge 2
18, 19
GND
Ground
20
V
BB2
Load supply voltage, bridge 2
21
OUT
2A
Output A, bridge 2
22
S
20
Control input, bridge 2
23
PWM
2
Control input, bridge 2
24
V
DD
Logic supply voltage



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