Quality Standards and Environmental Certifications

A3950: DMOS Full-Bridge Motor Driver

A3950 Datasheet
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Description

Designed for PWM (pulse width modulated) control of DC motors, the A3950 is capable of peak output currents to ±2.8 A and operating voltages to 36 V.

PHASE and ENABLE input terminals are provided for use in controlling the speed and direction of a DC motor with externally applied PWM control signals. Internal synchronous rectification control circuitry is provided to lower power dissipation during PWM operation.

Internal circuit protection includes motor lead short-to-supply / short-to-ground, thermal shutdown with hysteresis, undervoltage monitoring of VBB and VCP, and crossover-current protection.

The A3950 is supplied in a thin profile (<1.2 mm overall height) 16 pin TSSOP package (LP), and a very thin (0.75 mm nominal height) QFN/MLP package. Both packages provide an exposed pad for enhanced thermal dissipation, and are lead (Pb) free with 100% matte tin leadframe plating.

Top Features

  • Low RDS(on) outputs
  • Overcurrent protection
  • Motor lead short-to-supply protection
  • Short-to-ground protection
  • Sleep function
  • Synchronous rectification
  • Diagnostic output
  • Internal undervoltage lockout (UVLO)
  • Crossover-current protection
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Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant 		Part Composition /
RoHS Data 		Comments Samples Check Stock
A3950SEUTR-T 16-lead QFN/MLP -20°C to 85°C Yes View Data Contact your
local sales rep		 Check
Distributor Stock
A3950SLPTR-T 16-lead TSSOP -20°C to 85°C Yes View Data Contact your
local sales rep		 Check
Distributor Stock

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.

Packaging

The A3950 is supplied in a thin profile (<1.2 mm overall height) 16 pin TSSOP package (LP). It is also supplied in a very thin (0.75 mm nominal height) QFN/MLP package (EU).

LP TSSOP 16 pinEU QFN/MLP 16 pin with exposed pad


 

Both packages provide an exposed pad for enhanced thermal dissipation, and are lead (Pb) free with 100% matte tin leadframe plating.