A3964(2008) Просмотр технического описания (PDF) - Allegro MicroSystems
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A3964 Datasheet PDF : 10 Pages
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3964
DUAL FULL-BRIDGE
PWM MOTOR DRIVER
5
4
3
2
1
0
25
A3964SB
RθJT = 6.0°C/W
SUFFIX 'B', RθJA = 40°C/W
SUFFIX 'LB', R θJA = 60°C/W
50
75
100
TEMPERATURE IN °C
125
150
Dwg. GP-049-4
NO
CONNECT.
1 NC
OUT 1B 2
SENSE 1 3
1
OUT 1A 4
LOAD 5
VBB
SUPPLY
GROUND 6
GROUND 7
VREF(IN) 8
RC 1 99
PHASE 1 10 θ1
ENABLE 1 11
NO
CONNECT.
12
NC
FUNCTIONAL BLOCK DIAGRAM
(A3964SLB pinning shown)
NC 24 NO
CONNECT.
23 OUT 2B
2
22 SENSE 2
21 OUT 2A
V CC
20
LOGIC
SUPPLY
19 GROUND
18 GROUND
17 V REF(OUT)
16 RC 2
θ 2 15 PHASE 2
14 ENABLE 2
NC 13 NO
CONNECT.
Dwg. PP-005-2
17
VCC
PHASE 1 9
ENABLE1 10
SOURCE
DISABLE
ONE SHOT
–
+
3
1
4
VBB
1
2.5 V
REFERENCE
V REF(IN)
18 20
UVLO
& TSD
12 PHASE 2
2
11 ENABLE2
SOURCE
DISABLE
–
+
ONE SHOT
8
RT
CT
2
14
7
5 6 15 16
19
RA
RB
RS
RS
13
RT
CT
Dwg. FP-033-1
115 Northeast Cutoff, Box 15036
2
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1997, 2000 Allegro MicroSystems, Inc.
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