A3995
DMOS Dual Full Bridge PWM Motor Driver
Features and Benefits
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36 V output rating
2.4 A dc motor driver
Synchronous rectification
Internal undervoltage lockout (UVLO)
Thermal shutdown circuitry
Crossover-current protection
Very thin profile QFN package
Description
The A3995 is designed to drive two dc motors at currents up to
2.4 A. Capable of drive voltages up to 36 V, the A3995 includes
two independent fixed off-time PWM current regulators that
operate in either fast or slow decay mode, as determined by
the MODE input. Internal synchronous rectification control
circuitry is provided to improve power dissipation during
PWM operation.
Protection features include: thermal shutdown with hysteresis,
undervoltage lockout (UVLO) and crossover current protection.
Special power-up sequencing is not required.
The A3995 is supplied in a 36 pin QFN package (suffix EV)
with exposed power tab for enhanced thermal performance. It
has a 6 mm × 6 mm footprint, with a nominal overall package
height of 0.90 mm, and is lead (Pb) free, with 100% matte tin
leadframe plating.
Package: 36 pin QFN
0.90 mm nominal height (suffix EV)
Approximate scale 1:1
Typical Application Diagram
CP1
VDD
CP2
VCP
VBB
VBB
OUT1A
OUT1A
OUT1B
OUT1B
SENSE1
SENSE1
MODE1
PHASE1
Microcontroller or
Controller Logic
ENABLE1
VREF1
MODE2
PHASE2
ENABLE2
VREF2
A3995
OUT2A
OUT2A
OUT2B
OUT2B
GND
GND
GND
A3995DS
GND
SENSE2
SENSE2
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
