A3955SLB Allegro Microsystems Inc, A3955SLB Datasheet - Page 5

• Manufacturer Part Number: A3955SLB
• Description: IC MOTOR DRIVER PWM FULL 16-SOIC
• Manufacturer: Allegro Microsystems Inc

Specifications of A3955SLB

• Applications: Stepper Motor Driver
• Number Of Outputs: 1
• Current - Output: ±1.5A
• Voltage - Load: 4.5 V ~ 50 V
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

A3955
ELECTRICAL CHARACTERISTICS (continued) at T
5.5 V (unless otherwise noted. )
Control Circuitry
* The total error for the V
Characteristic
Logic Supply Voltage Range
Reference Voltage Range
UVLO Enable Threshold
UVLO Hysteresis
Logic Supply Current
Logic Input Voltage
Logic Input Current
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
REF
/V
S
function is the sum of the D/A error and the current-sense comparator input offset voltage.
Full-Bridge PWM Microstepping Motor Driver
∆V
Symbol
V
V
I
SRCR
I
CC(OFF)
V
CC(ON)
V
V
REF
V
V
IO(PFD)
I
I
V
I
IN(1)
IN(0)
IO(PFD)
REF
—
IO(S)
IN(1)
IN(0)
REF
PFD
CC
/V
S
Test Conditions
Operating
Operating
D
V
V
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
V
IN
IN
REF
REF
0
0
0
0
0
0
0
0
0
CC
= D
= D
= 2 V, D
= 0.8 V, D
= D
= D
= 2 V, D
= 0.8 V, D
= D
= 2.0 V
= 0.8 V
= 0 →5 V
= 0 V to 2.5 V
= 0 V
1
1
1
1
1
= D
= D
= 2 V, D
= 0.8 V, D
= D
0
REF
REF
= D
1
1
2
2
2
= D
= 0.8 V, D
2.5 V
1.0 V
1
1
= 0.8 V
= 0.8 V
= 2 V
1
= 2 V, D
= D
= D
2
2
= 0.8 V
= 0.8 V
2
2
2
= 2 V
= 2 V
= 2 V
A
2
2
= 25°C, V
= 0.8 V
= 2 V
BB
= 5 V to 50 V, V
3.35
0.30
Min.
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
4.5
0.5
2.0
3.5
1.1
5.0
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
<-2.0
Typ.
3.70
0.45
<1.0
19.5
38.2
55.5
70.7
83.1
92.4
100
5.0
3.0
42
12
25
—
—
—
—
—
—
—
—
—
—
0
0
Limits
CC
Continued next page…
= 4.5 V to
Max.
4.05
0.60
-200
±5.0
±3.0
±4.0
±5.0
±20
5.5
2.5
0.8
3.1
0.8
50
16
20
55
—
—
—
—
—
—
—
—
—
—
—
Units
mA
mA
mV
mV
mV
μA
μA
μA
—
%
%
%
%
%
%
%
%
%
%
V
V
V
V
V
V
V
V
V
4