A3985 Allegro MicroSystems, Inc., A3985 Datasheet - Page 2

• Manufacturer Part Number: A3985
• Description: Digitally Programmable Dual Full-Bridge MOSFET Driver
• Manufacturer: Allegro MicroSystems, Inc.

A3985
Description (continued)
control for a variety of step methods, from microstepping to full-step
drive. Load current in the external power MOSFET full-bridges is
set in 1.56% increments of the maximum value.
The above-supply voltage required for the high-side N-channel
MOSFETs is provided by a bootstrap capacitor. Efficiency is
enhanced by using synchronous rectification and the power FETs
Selection Guide
*Contact Allegro for additional packing options
Absolute Maximum Ratings
Supply Voltage
Logic Supply Voltage
Logic Inputs and Outputs
SENSEx pins
Sxx pins
LSSx pins
GHxx pins
GLxx pins
Cxx pins
Operating Ambient Temperature
Junction Temperature
Storage Temperature
A3985SLD-T
A3985SLDTR-T
Part Number
Characteristic
Tube, 50 pieces per tube
Tape and reel, 4000 pieces per reel
Symbol
T
J
V
V
(max)
T
T
stg
BB
DD
A
Packing*
Range S
Dual Full-Bridge MOSFET Driver
are protected from shoot-through by integrated crossover-control
and programmable dead time.
In addition to crossover current control, internal circuit protection
provides thermal shutdown with hysteresis and undervoltage lockout.
Special power-up sequencing is not required. This component is
supplied in a 38-pin TSSOP (package LD) with 100% matte tin
leadframe plating.
Notes
Digitally Programmable
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
–0.3 to Sxx+15
Sxx to Sxx+15
–55 to 150
–20 to 85
–2 to 16 V
–0.3 to 50
–0.3 to 7
–0.3 to 7
–2 to 55
Rating
–1 to 1
–2 to 5
150
Units
ºC
ºC
ºC
V
V
V
V
V
V
V
V
V
2