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3966 Datasheet(PDF) 2 Page - Allegro MicroSystems

Part No. 3966
Description  DUAL FULL-BRIDGE PWM MOTOR DRIVER
Download  9 Pages
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

3966 Datasheet(HTML) 2 Page - Allegro MicroSystems

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3966
DUAL FULL-BRIDGE
PWM MOTOR DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
2
Copyright © 1998, 2003 Allegro MicroSystems, Inc.
FUNCTIONAL BLOCK DIAGRAM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
OUT1B
GROUND
Dwg. PP-066-2
OUT
1A
PHASE 1
OUT2A
SENSE 1
ENABLE 1
LOAD
SUPPLY
REFERENCE
PHASE 2
ENABLE 2
SENSE 2
OUT 2B
LOGIC
SUPPLY
RC
RC
V
REF
V
CC
V
BB
GROUND
A3966SA (DIP)
TRUTH TABLE
PHASE
ENABLE
OUTA
OUTB
XH
Off
Off
HL
H
L
LL
L
H
X = Irrelevant
R2S
R1S
REFERENCE
÷4
V CC
LOGIC
SUPPLY
PHASE 1
LOAD
SUPPLY
V BB
RC
R T
C T
Dwg. FP-036-6
SENSE
UVLO
& TSD
BLANKING
GATE
Q
R
S
PWM LATCH
+
CURRENT-SENSE
COMPARATOR
ENABLE 1
OSC
PHASE2
GROUND
SENSE
UVLO
& TSD
BLANKING
GATE
Q
R
S
PWM LATCH
+
CURRENT-SENSE
COMPARATOR
ENABLE 2
2
1
2
2
2
1
1
1


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