A3979SLP-T Allegro Microsystems Inc, A3979SLP-T Datasheet - Page 4

• Manufacturer Part Number: A3979SLP-T
• Description: IC, SM MOTOR DRIVER 2.5A TSSOP-28
• Manufacturer: Allegro Microsystems Inc

Specifications of A3979SLP-T

• Driver Ic Type: Microstepping DMOS Driver With Translator
• Voltage, Output Max: 35V
• Current, Output Max: 2.5A
• Temp, Op. Min: -20(degree C)
• Temp, Op. Max: 85(degree C)
• Pins, No. Of: 28
• Case: RoHS Compliant
• Applications: Stepper Motor Driver
• Number Of Outputs: 1
• Current - Output: ±2.5A
• Voltage - Load: 8 V ~ 35 V
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 620-1080

A3979
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ELECTRICAL CHARACTERISTICS
Output Drivers
Load Supply Voltage Range
Output Leakage Current
Output On Resistance
Body Diode Forward Voltage
Motor Supply Current
Control Logic
Logic Supply Voltage Range
Logic Supply Current
Logic Input Voltage
Logic Input Current
Reference Input Voltage Range
Reference Input Current
HOME Output Voltage
Mixed Decay Mode Trip Point
Gain (G
STEP Pulse Width
Blank Time
Fixed Off-Time
Crossover Dead Time
m
Characteristics
) Error
3
2
2
V
V
Symbol
R
V
t
HOME(1)
HOME(0)
V
V
V
V
BLANK
I
DS(On)
I
I
V
I
t
V
I
I
IN(1)
IN(0)
PFDH
DSS
REF
PFDL
OFF
t
DMOS Microstepping Driver with Translator
V
E
IN(1)
IN(0)
t
DD
REF
BB
DT
DD
W
BB
G
F
at T
A
= 25°C, V
Operating
During Sleep mode
V
V
Source driver, I
Sink driver, I
Source diode, I
Sink diode, I
f
Operating, outputs disabled
Sleep mode
Operating
f
Outputs off
Sleep mode
V
V
Operating
I
I
V
V
V
R
R
Synchronous rectification enabled
PWM
PWM
HOME(1)
HOME(0)
OUT
OUT
IN
IN
REF
REF
REF
T
T
= 56 kΩ, C
= 56 kΩ, C
= 0.3
= 0.7
< 50 kHz
< 50 kHz
= 2 V,
= 2 V,
= 2 V,
= V
= 0 V
= –200 μA
= 200 μA
×
BB
×
BB
Test Conditions
V
V
Phase Current =
Phase Current
Phase Current
DD
OUT
F
DD
= 35 V, V
= 2.5 A
T
T
OUT
F
= 680 pF
= 680 pF
= 2.5 A
= –2.5 A
= –2.5 A
DD
= 3.0 to 5.5 V (unless otherwise noted)
= 70.71%
= 100.00%
38.27%
0.7
0.7
Min.
–20
–20
700
100
3.0
×
×
30
8
0
–
–
–
–
–
–
–
–
–
–
–
–
–
0
–
–
–
–
–
–
–
1
V
V
115 Northeast Cutoff, Box 15036
DD
DD
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
0.21
0.6
Typ.
<1.0
<1.0
0.28
0.22
<1.0
<1.0
950
475
5.0
38
×
–
–
–
–
–
–
–
–
–
–
–
–
–
0
–
–
×
–
–
–
–
V
V
1
DD
DD
0.3
0.3
0.335
0.265
Max.
1200
±5.0
±5.0
V
–20
±10
800
1.4
1.4
8.0
6.0
5.5
35
35
20
20
12
10
20
20
20
±3
×
46
×
–
–
–
–
–
DD
V
V
DD
DD
Units
mA
mA
mA
mA
μA
μA
μA
μA
μA
μA
μA
μs
ns
μs
ns
%
%
%
Ω
Ω
V
V
V
V
V
V
V
V
V
V
V
V
4