A3982 データシートの表示（PDF） - Allegro MicroSystems
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A3982 Datasheet PDF : 11 Pages
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A3982
DMOS Stepper Motor Driver with Translator
Description (continued)
fixed off-time, then to a slow decay for the remainder of the
off-time). This current decay control scheme results in reduced
audible motor noise, increased step accuracy, and reduced power
dissipation.
Internal synchronous rectification control circuitry is provided to
improve power dissipation during PWM operation.
Internal circuit protection includes: thermal shutdown with
hysteresis, undervoltage lockout (UVLO), and crossover-current
protection. Special power-on sequencing is not required.
The A3982 is supplied in a 24-pin wide-body SOIC
(package LB) with internally-fused power ground leads for
enhanced thermal dissipation. It is lead (Pb) free, with 100%
matte tin plated leadframe.
Selection Guide
Part Number
Packing*
A3982SLB-T
31 pieces per tube
A3982SLBTR-T
1000 pieces per reel
*Contact Allegro for additional packing options
Package
24-pin Wide SOIC with pins 6 and 7, and 18
and 19, fused internally
Absolute Maximum Ratings
Characteristic
Load Supply Voltage
Logic Input Voltage
Sense Voltage
Reference Voltage
Output Current
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
Symbol
VBB
VIN
VSENSE
VREF
IOUT
TA
TJ(max)
Tstg
Notes
Output current rating may be limited by duty cycle,
ambient temperature, and heat sinking. Under
any set of conditions, do not exceed the specified
current rating or a junction temperature of 150°C.
Range S
Rating
35
–0.3 to 7
0.5
4
±2
–20 to 85
150
–55 to 150
Units
V
V
V
V
A
ºC
ºC
ºC
Allegro MicroSystems, LLC
2
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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