A3955SLB-T Allegro Microsystems Inc, A3955SLB-T Datasheet - Page 4

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

Specifications of A3955SLB-T

• 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)
• Motor Type: Full Bridge
• No. Of Outputs: 2
• Output Current: 1.5A
• Output Voltage: 50V
• Supply Voltage Range: 4.5V To 5.5V
• Driver Case Style: SOIC
• No. Of Pins: 16
• Operating Temperature Range: -20°C To
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 620-1068

A3955
ELECTRICAL CHARACTERISTICS at T
(unless otherwise noted.)
Power Outputs
Load Supply Voltage Range
Output Leakage Current
Output Saturation Voltage
(Forward or Reverse Mode)
Sense Current Offset
Clamp Diode Forward Voltage
(Sink or Source)
Motor Supply Current
(No Load)
1.1 V to 3.1 V
Characteristic
PHASE
≥3.5 V
≤0.8 V
V
H
L
PFD
Table 1 — PHASE Truth Table
Table 2 — PFD Truth Table
Description
Slow Current-Decay Mode
Mixed Current-Decay Mode
Fast Current-Decay Mode
OUT
H
L
A
Full-Bridge PWM Microstepping Motor Driver
Symbol
V
I
I
BB(OFF)
BB(ON)
CE(SAT)
V
I
I
CEX
V
SO
BB
F
OUT
Operating, I
V
V
V
I
I
I
D
Test Conditions
S
F
F
OUT
OUT
S
0
H
= 0.85 A
= 1.5 A
- I
L
Source Driver, I
Source Driver, I
Sink Driver, I
Sink Driver, I
V
= D
= 1.0 V:
A
OUT
S
B
= V
= 0 V
= 25°C, V
= 0 V, V
1
, I
= D
BB
OUT
OUT
2
= 850 mA,
= 0.8 V
CC
= ±1.5 A, L = 3 mH
OUT
OUT
= 5 V
OUT
OUT
BB
where V
= 0.85 A
= 1.5 A
D
= 5 V to 50 V, V
= -0.85 A
= -1.5 A
H
H
H
H
L
L
L
L
2
DAC DATA
S
= I
D
H
H
H
H
L
L
L
L
Table 3 — DAC Truth Table
TRIP
1
•R
S
D
H
H
H
H
. See Applications section.
L
L
L
L
0
CC
Min.
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
V
—
—
—
—
—
—
—
—
20
—
—
= 4.5 V to 5.5 V
CC
Ratio, %
Current
All Outputs Disabled
92.4
83.1
70.7
55.5
38.2
19.5
100
Typ.
<-1.0
2.0
1.0
<1.0
1.0
1.3
0.5
1.3
1.2
1.4
33
—
Limits
Continued next page…
Max.
-50
1.2
1.5
0.6
1.5
1.4
1.7
4.0
50
50
40
50
V
15.38
REF
3.00
3.25
3.61
4.24
5.41
7.85
/V
Units
S
mA
mA
μA
μA
μA
V
V
V
V
V
V
V
3