A3957SLB Allegro, A3957SLB Datasheet - Page 5

• 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

ELECTRICAL CHARACTERISTICS at T
otherwise noted.)
Control Circuitry (continued)
* The total error for the V
3957
FULL-BRIDGE PWM
MICROSTEPPING
MOTOR DRIVER
Characteristic
Mixed-Decay Comparator
Trip Points
Mixed-Decay Comparator
Input Offset Voltage
Mixed-Decay Comparator
Hysteresis
Reference Input Current
Reference Divider Ratio
Digital-to-Analog Converter
Accuracy*
Current-Sense Comparator
Input Offset Voltage*
Step Reference
Current Ratio
Thermal Shutdown Temp.
Thermal Shutdown Hyst.
REF
/V
S
function is the sum of the D/A error and the current-sense comparator input offset voltage.
Symbol
V
V
SRCR
V
V
REF
V
IO(PFD)
I
IO(PFD)
REF
—
IO(S)
T
PFD
T
J
/V
J
S
Test Conditions
Slow Current-Decay Mode
Mixed Current-Decay Mode
Fast Current-Decay Mode
V
at trip, D
1.0 V < V
0.5 V < V
V
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
REF
REF
0
1
0
2
0
1
0
3
0
1
0
2
0
1
0
= D
= 2 V, D
= D
= 2 V, D
= D
= D
= D
= 2 V, D
= D
= D
= D
= D
= D
= D
= D
A
= 25˚C, V
= 0 V to 2.5 V
= 0 V
1
1
2
2
1
3
3
1
3
2
2
1
= D
= 2 V, D
= 2 V, D
= 2 V, D
= D
= 2 V, D
= 2 V, D
= D
= 2 V, D
= D
= D
= D
0
REF
REF
= D
0
0
0
2
2
3
3
3
2
= D
= D
= D
= D
= 2 V, D
= 2 V, D
= 2 V, D
= 2 V, D
= D
1
2.5 V
1.0 V
= D
2
2
1
1
0
1
1
0
0
BB
3
3
= D
= D
= D
= D
= D
= D
= D
= D
= D
= 0.8 V
= 2 V
2
= 5 V to 50 V, V
= D
3
3
3
3
3
3
2
2
2
2
1
1
0
= 0.8 V
= 0.8 V
= 0.8 V
= 0.8 V
= 0.8 V
= 0.8 V
= 0.8 V
= 0.8 V
= 0.8 V
= 0.8 V
= 0.8 V
= 0.8 V
= 0.8 V
3
= 2 V
CC
Min.
3.5
1.2
5.0
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
= 4.5 V to 5.5 V (unless
Typ.
17.4
26.1
34.8
43.5
52.2
60.9
69.6
73.9
78.3
82.6
87.0
91.3
95.7
100
165
3.0
25
15
—
—
—
—
—
—
0
16
0
Limits
Continued next page…
Max.
2.9
0.8
55
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
5.0
3.0
4.0
20
Units
mV
mV
mV
—
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
V
V
V
C
C
A