A3983(2008) 查看數據表（PDF） - Allegro MicroSystems
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A3983 Datasheet PDF : 11 Pages
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A3983
DMOS Microstepping Driver with Translator
Description (continued)
control scheme results in reduced audible motor noise, increased
step accuracy, and reduced power dissipation.
lockout (UVLO), and crossover-current protection. Special power-
on sequencing is not required.
Internal synchronous rectification control circuitry is provided to
improve power dissipation during PWM operation. Internal circuit
protection includes: thermal shutdown with hysteresis, undervoltage
The A3983 is supplied in a low-profile (1.2 mm maximum height),
24-pin TSSOP with exposed thermal pad (suffix LP). It is lead (Pb)
free, with 100% matte tin leadframe plating.
Selection Guide
Part Number
A3983SLP-T
A3983SLPTR-T
Pb-free
Yes
Yes
Package
24-pin TSSOP with exposed thermal pad
24-pin TSSOP with exposed thermal pad
Packing
62 pieces per tube
4000 pieces per 13-in. reel
Absolute Maximum Ratings
Characteristic
Load Supply Voltage
Output Current
Logic Input Voltage
Sense Voltage
Reference Voltage
Operating Ambient Temperature
Maximum Junction
Storage Temperature
Symbol
VBB
IOUT
VIN
VSENSE
VREF
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 tem-
perature of 150°C.
Range S
THERMAL CHARACTERISTICS
Characteristic
Symbol
Package Thermal Resistance
RθJA
Test Conditions*
Package LP; 4-layer PCB, based on JEDEC standard)
*In still air. Additional thermal information available on Allegro Web site.
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
20
Maximum Power Dissipation, PD(max)
(R
θJA = 28 ºC/W)
40 60 80 100 120 140 160 180
Temperature (°C)
Rating
35
±2
–0.3 to 7
0.5
4
–20 to 85
150
–55 to 150
Units
V
A
V
V
V
ºC
ºC
ºC
Value Units
28 ºC/W
Allegro MicroSystems, Inc.
2
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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