AMT49701: Quad DMOS Full-Bridge PWM Motor Driver

Description

The AMT49701 is a quad DMOS full-bridge driver capable of driving up to two stepper motors or four DC motors. Each full-bridge output is rated up to 1 A and 18 V. The AMT49701 includes fixed off-time pulse-width modulation (PWM) current regulators, along with 2- bit nonlinear DACs (digital-to-analog converters) that allow stepper motors to be controlled in full, half, and quarter steps, and DC motors in forward, reverse, and coast modes. The PWM current regulator uses the Allegro™ patented mixed decay mode for reduced audible motor noise, increased step accuracy, and reduced power dissipation.

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 AMT49701 is supplied in the EV package, a 6 mm × 6 mm, 36-pin QFN package with a nominal overall package height of 0.90 mm, and with an exposed thermal pad for enhanced thermal performance. The package is lead (Pb) free, with 100% matte tin leadframe plating.

Top Features

  • 18 V output rating
  • 4 full bridges
  • Dual stepper motor driver
  • High-current outputs
  • 3.3 and 5 V compatible logic
  • Synchronous rectification
  • Internal undervoltage lockout (UVLO)
  • Thermal shutdown circuitry
  • Crossover-current protection
  • Overcurrent protection
  • Low-profile QFN package

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check Stock
AMT49701GEVATR 36-lead QFN/MLP -40°C to 105°C Yes View Data Contact your
local sales rep
Check
Distributor Stock
APEK49701GEV-01-T DEMO BOARD -40°C to 105°C No -- 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

AMT49701 Packages