A3958SB Allegro Microsystems Inc, A3958SB Datasheet - Page 3

• Manufacturer Part Number: A3958SB
• Description: IC MOTOR DRIVER PWM FULL 24-DIP
• Manufacturer: Allegro Microsystems Inc

Specifications of A3958SB

• Applications: PWM Motor Driver
• Number Of Outputs: 1
• Current - Output: ±2A
• Voltage - Load: 20 V ~ 50 V
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 24-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Absolute Maximum Ratings
A3958
Selection Guide
Variant is in production but has been determined to be NOT FOR NEW DESIGN. This classification indicates
that sale of the variant is currently restricted to existing customer applications. The variant should not be
purchased for new design applications because obsolescence in the near future is probable. Samples are no
longer available. Status change: May 4, 2009.
Thermal Characteristics
Package Thermal Resistance, Junction
to Ambient
Package Thermal Resistance, Junction
to Tab
*Additional thermal information available on Allegro website.
Load Supply Voltage
Logic Supply Voltage
Input Voltage
Sense Voltage
Reference Voltage
Output Current
Package Power Dissipation
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
A3958SB-T*
A3958SLBTR-T
Part Number
Characteristic
Characteristic
24-pin DIP with exposed thermal tabs
24-pin SOICW with internally fused pins
Symbol
Symbol
T
J
V
V
V
I
(max)
V
T
R
R
OUT
P
V
T
REF
stg
BB
DD
IN
θJA
S
D
A
θJT
Packing
B Package, single-layer PCB, 1 in.
LB Package, single-layer PCB, minimal exposed copper area
Output current rating may be limited by duty cycle, ambient
temperature, and heat sinking. Under any set of conditions, do
not exceed the specifi ed current rating or a junction tempera-
ture of 150°C.
B package, per SEMI G42-88 Specification, T
LB package, per SEMI G42-88 Specification, T
Range S
Fault conditions that produce excessive junction temperature
will activate the device’s thermal shutdown circuitry. These
conditions can be tolerated but should be avoided.
Copyright © 2000, 2002 Allegro MicroSystems, Inc.
DMOS Full-Bridge PWM Motor Driver
Test Conditions*
Notes
1000 per reel
15 per Tube
Package
2
2-oz. exposed copper
4
3
2
1
0
25
A
SUFFIX 'LB', R
= 25°C
A
50
= 25°C
Allegro MicroSystems, Inc.
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
SUFFIX 'B', R
Worcester, Massachusetts 01615-0036 U.S.A.
TEMPERATURE IN C
75
JA
= 77 C/W
JA
= 40 C/W
R
JT
100
–0.3 to V
= 6.0 C/W
–55 to 150
–20 to 85
Rating
Value
±2.0
150
7.0
0.5
2.7
3.1
1.6
50
40
77
6
125
CC
+ 0.3
150
Units
Units
ºC/W
ºC/W
ºC/W
mA
ºC
ºC
ºC
W
W
V
V
V
V
V
2