A3986SLD-T Allegro MicroSystems, Inc., A3986SLD-T Datasheet - Page 6

• Manufacturer Part Number: A3986SLD-T
• Description: DUAL H-BRIDGE MOSFET DRVR W/MICRO TRANS
• Manufacturer: Allegro MicroSystems, Inc.

A3986
THERMAL CHARACTERISTICS
Package Thermal Resistance
*Additional thermal information available on Allegro Web site.
Table 1. Microstep Resolution Truth Table
MS2
Characteristic
0
0
1
1
MSx, DIR
RESET
STEP
MS1
Figure 1. Logic Interface Timing Diagram
0
1
0
1
Microstep Resolution
Sixteenth Step
Quarter Step
t
WAKE
Half Step
Full Step
Symbol
t
SU
R
θJA
4-layer PCB, based on JEDEC standard
1-layer PCB with copper limited to solder pads
t
H
t
Dual Full-Bridge MOSFET Driver
STEPH
with Microstepping Translator
Table 2. Mixed Decay Selection Truth Table
PFD2
Test Conditions*
0
0
1
1
PFD1
0
1
0
1
t
STEPL
100% ( ≡ Fast Decay)
Percentage of Fast decay
26% (23 cycles)
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
0% ( ≡ Slow Decay)
8% (7 cycles)
Value Units
127
51
ºC/W
ºC/W
6