A3957SLB Allegro, A3957SLB Datasheet - Page 3

• Manufacturer Part Number: A3957SLB
• Description: Full Bridge PWM Motor Driver 5V 24-Pin SOIC W
• Manufacturer: Allegro
• Type: Full Bridge PWM Motor Driverr

Specifications of A3957SLB

• Package: 24SOIC W
• Operating Supply Voltage: 5 V
• Maximum Operating Current: 4 mA
• Operating Temperature: -20 to 85 °C

3957
FULL-BRIDGE PWM
MICROSTEPPING
MOTOR DRIVER
where V
D
1.2 V to 2.9 V
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
3
PHASE
V
3.5 V
0.8 V
DAC Data
S
PFD
H
L
D
= I
H
H
H
H
L
L
L
L
H
H
H
H
L
L
L
Table 1 — PHASE Truth Table
2
Table 3 — DAC Truth Table
Table 2 — PFD Truth Table
TRIP
D
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
• R
1
S
. See Applications section.
Description
Slow Current-Decay Mode
Mixed Current-Decay Mode
Fast Current-Decay Mode
D
H
H
H
H
H
H
H
X
L
L
L
L
L
L
L
0
OUT
H
L
A
Current
Ratio, %
All Outputs Disabled
95.7
91.3
87.0
82.6
78.3
73.9
69.6
60.9
52.2
43.5
34.8
26.1
17.4
100
OUT
V
H
L
11.49
17.24
REF
3.00
3.13
3.29
3.45
3.64
3.83
4.07
4.31
4.93
5.74
6.90
8.62
B
/V
S