A4983SET View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
MFG CO.
'A4983SET' PDF : 16 Pages View PDF
A4983
DMOS Microstepping Driver with Translator
Description (continued)
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 A4983 is supplied in a 5 mm × 5 mm × 0.90 nominal surface
mount QFN package with exposed thermal pad (suffix ET). The
package is lead (Pb) free (suffix –T), with 100% matte tin plated
leadframe.
Selection Guide
Part Number
A4983SET-T
A4983SETTR-T
Pb-free
Yes
Yes
Package
28-pin QFN with exposed thermal pad
28-pin QFN with exposed thermal pad
Packing
73 pieces per tube
1500 pieces per 7-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
Duty Cycle < 20%
Range S
Notes
Rating
35
±2
±2.5
–0.3 to 7
0.5
4
–20 to 85
150
–55 to 150
Units
V
A
A
V
V
V
ºC
ºC
ºC
Allegro MicroSystems, Inc.
2
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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