A3982
DMOS Stepper Motor Driver with Translator
THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information
Characteristic
Symbol
Test Conditions*
Value Units
One-layer PCB, one-sided with copper limited to solder pads
77 ºC/W
One layer PCB, two-sided with copper limited to solder pads and
3.57 in.2 of copper area on each side, connected to PGND pins
45 ºC/W
35 ºC/W
RθJA
Package Thermal Resistance
High-K PCB (multilayer with significant copper areas, based on
JEDEC standard)
*In still air. Additional thermal information available on Allegro Web site.
Power Dissipation versus Ambient Temperature
4.00
3.50
3.00
2.50
2.00
1.50
1.00
0.50
0
20
40
60
80
100
120
140
160
Temperature, T (°C)
A
Allegro MicroSystems, Inc.
4
115 Northeast Cutoff, Box 15036
26184.28B
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
