A3995SEV-T Allegro Microsystems Inc, A3995SEV-T Datasheet

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A3995SEV-T

Manufacturer Part Number
A3995SEV-T
Description
Manufacturer
Allegro Microsystems Inc
Datasheet

Specifications of A3995SEV-T

Operating Current
10mA
Operating Temperature Classification
Commercial
Package Type
QFN
Operating Supply Voltage (min)
3V
Operating Supply Voltage (max)
5.5V
Lead Free Status / RoHS Status
Compliant
Features and Benefits
▪ 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
Package: 36 pin QFN
0.90 mm nominal height (suffix EV)
A3995DS
Approximate scale 1:1
Microcontroller or
Controller Logic
DMOS Dual Full Bridge PWM Motor Driver
Typical Application Diagram
MODE1
PHASE1
ENABLE1
VREF1
MODE2
PHASE2
ENABLE2
VREF2
VDD
CP1
CP2
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.
A3995
VCP
VBB
SENSE1
SENSE1
SENSE2
SENSE2
OUT1B
OUT1B
OUT2B
OUT2B
OUT1A
OUT1A
OUT2A
OUT2A
VBB
A3995

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A3995SEV-T Summary of contents

Page 1

DMOS Dual Full Bridge PWM Motor Driver Features and Benefits ▪ output rating ▪ 2 motor driver ▪ Synchronous rectification ▪ Internal undervoltage lockout (UVLO) ▪ Thermal shutdown circuitry ▪ Crossover-current protection ▪ Very thin profile QFN package Package: 36 pin QFN 0.90 mm nominal height (suffix EV) Approximate scale 1:1 Microcontroller or Controller ...

Page 2

... A3995 Selection Guide Part Number A3995SEV-T 61 pieces per tube A3995SEVTR-T 1500 pieces per reel Absolute Maximum Ratings Characteristic Symbol Load Supply Voltage V BB Logic Supply Voltage V DD Output Current * I OUT Logic Input Voltage Range V IN SENSEx Pin Voltage V SENSEx VREFx Pin Voltage ...

Page 3

A3995 VDD OSC MODE1 PHASE1 ENABLE1 Sense1 VREF1 3 MODE2 PHASE2 ENABLE2 Sense2 - VREF2 3 DMOS Dual Full Bridge PWM Motor Driver Functional Block Diagram CHARGE V PUMP CP CONTROL LOGIC GATE DRIVE PWM Latch BLANKING V CP CONTROL ...

Page 4

A3995 ELECTRICAL CHARACTERISTICS 1 , valid at T Characteristics Load Supply Voltage Range Logic Supply Voltage Range VDD Supply Current Output On Resistance V , Outputs f Output Leakage VBB Supply Current Control Logic Logic Input Voltage Logic Input Current ...

Page 5

A3995 Logic Timing Diagram, DC Driver ENB PH MODE V BB OUTA OUTB OUT 0 A OutA A Charge Pump and VREG Power-up Delay ( 200 µs) DMOS Dual Full Bridge PWM Motor ...

Page 6

A3995 Device Operation The A3995 is designed to operate two dc motors. The currents in each of the output full-bridges, all N-channel DMOS, are regulated with fixed off-time pulse width modulated (PWM) control circuitry. The peak current to each full ...

Page 7

A3995 Motor Configurations For applications that require either a stepper/dc motor driver or dual stepper motor driver, Allegro offers the A3989 and A3988. These devices are offered in the same QFN package as the A3995. The A3988 is capable of ...

Page 8

A3995 Terminal List Table Number ...

Page 9

A3995 Preliminary dimensions, for reference only (reference JEDEC MO-220VJJD-1, except exposed thermal pad) Dimensions in millimeters U.S. Customary dimensions (in.) in brackets, for reference only Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead configuration ...

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