A3980KLP Allegro Microsystems Inc, A3980KLP Datasheet - Page 16

• Manufacturer Part Number: A3980KLP
• Description: IC DRIVER MICROSTEPPING 28-TSSOP
• Manufacturer: Allegro Microsystems Inc

Specifications of A3980KLP

• Applications: Stepper Motor Driver
• Number Of Outputs: 1
• Current - Output: ± 1A
• Voltage - Load: 7 V ~ 50 V
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

A3980
Current Sensing. To minimize inaccuracies caused by
ground-trace IR drops in sensing the output current level,
the current-sense resistors (R
independent ground return to the star ground point. This path
should be as short as possible. For low-value sense resistors,
the IR drops in the printed circuit board sense resistor traces
can be signifi cant and should be taken into account. The use
of sockets should be avoided as they can introduce variation
in R
The recommended value of the sense resistor, R
given by
up to a maximum of 1 Ω for I
R
in the following table.
S
should be 1 Ω, and V
S
due to their contact resistance.
I
MAX
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
(A)
R
S
REF
= 0.5 / I
R
1.00
1.00
1.00
1.00
1.00
0.83
0.71
0.63
0.56
0.50
S
reduced accordingly, as shown
S1
(Ω)
Recommended
TripMAX
and R
TripMAX
of 0.5 A. Below 0.5 A,
S2
) should have an
V
REF
0.8
1.6
2.4
3.2
4.0
4.0
4.0
4.0
4.0
4.0
(V)
Automotive DMOS Microstepping Driver
S
(Ω), is
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
with Translator
16