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A3957SLB Datasheet(PDF) 2 Page - Allegro MicroSystems

Part # A3957SLB
Description  FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER
Download  16 Pages
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A3957SLB Datasheet(HTML) 2 Page - Allegro MicroSystems

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3957
FULL-BRIDGE PWM
MICROSTEPPING
MOTOR DRIVER
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
13
3
11
20
D/A
PFD
2
+
–
VBB
RC
R S
Dwg. FP-042-1
SENSE
17
18
19
VCC
BLANKING
VCC
9
PHASE
10
UVLO
& TSD
GROUND
Q
R
S
PWM LATCH
+ –
VTH
R T
C T
5
6
23
7
MIXED-DECAY
COMPARATOR
+
–
15
22
÷3
DISABLE
CURRENT-SENSE
COMPARATOR
BLANKING
GATE
8
FUNCTIONAL BLOCK DIAGRAM (A3957SLB shown)
W
Copyright © 1998 Allegro MicroSystems, Inc.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
LOGIC
SUPPLY
PHASE
GROUND
RC
SENSE
D 3
Dwg. PP-056-3
REF
LOAD
SUPPLY
VCC
OUTB
OUTA
VBB
PFD
D 1
D 0
GROUND
D 2
NO
CONNECT
NC
LOGIC
A3957SA
For the ‘A’ package, pins 1 and 8 must
be externally connected together.


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