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A3985 Datasheet(PDF) 2 Page - Allegro MicroSystems

Part No. A3985
Description  Digitally Programmable Dual Full-Bridge MOSFET Driver
Download  15 Pages
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A3985 Datasheet(HTML) 2 Page - Allegro MicroSystems

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Digitally Programmable
Dual Full-Bridge MOSFET Driver
A3985
2
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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
are protected from shoot-through by integrated crossover-control
and programmable dead time.
In addition to crossover current control, internal circuit protection
providesthermalshutdownwithhysteresisandundervoltagelockout.
Special power-up sequencing is not required. This component is
supplied in a 38-pin TSSOP (package LD) with 100% matte tin
leadframe plating.
Description (continued)
Selection Guide
Part Number
Packing*
A3985SLD-T
Tube, 50 pieces per tube
A3985SLDTR-T
Tape and reel, 4000 pieces per reel
*Contact Allegro for additional packing options
Absolute Maximum Ratings
Characteristic
Symbol
Notes
Rating
Units
Supply Voltage
VBB
–0.3 to 50
V
Logic Supply Voltage
VDD
–0.3 to 7
V
Logic Inputs and Outputs
–0.3 to 7
V
SENSEx pins
–1 to 1
V
Sxx pins
–2 to 55
V
LSSx pins
–2 to 5
V
GHxx pins
Sxx to Sxx+15
V
GLxx pins
–2 to 16 V
V
Cxx pins
–0.3 to Sxx+15
V
Operating Ambient Temperature
TA
Range S
–20 to 85
ºC
Junction Temperature
TJ(max)
150
ºC
Storage Temperature
Tstg
–55 to 150
ºC


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