A5990: Quad DMOS Full-Bridge PWM Motor Driver

The A5990 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 1.6 A and 40 V. The A5990 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 A5990 PWM current regulator features externally adjustable off-time to adapt the current control to supply voltage and motor parameters (each bridge pair can be adjusted independently). The A5990 also features an adaptive percent fast decay (APFD) option which automatically and continuously adjusts the fast decay portion of the off-time to provide increased step accuracy, lower current ripple, and reduced power dissipation in many conditions. Alternatively the A5990 can be set to use the Allegro™ patented mixed decay mode with fixed percent fast decay of 30.1%.

Internal synchronous rectification control circuitry is provided to improve power dissipation during PWM operation. To minimize power consumption when not in use, the A5990 can be put into a low current Sleep Mode. Protection features include thermal shutdown with hysteresis, undervoltage lockout (UVLO), over current (OCP) and crossover-current protection. Special power-up sequencing is not required.

The A5990 is supplied in the EV package, a 6 mm × 6 mm 40-pin QFN package with a nominal overall package height of 0.90 mm. The packages is lead (Pb) free, with 100% matte-tin leadframe plating.

DATASHEETS
SAMPLE & BUY

Astrorep Inc. (Allegro and Sanken Semiconductors, Sanken Power Supplies)
141 John Street, Suite 300
Babylon, NY 11702
Phone: (631)422-2500
Fax: (631)422-2504
Web: www.astrorepinc.com
Email: donna.tweedy@astrorepinc.com

If this is not your local representative, find your local sales rep here.

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  • Features and BenefitsFeatures and Benefits
  • PackagingPackaging
  • Technical DocsTechnical Docs
  • NewsNews
  • 40 V output rating
  • 4 full bridges
  • Dual stepper motor driver
  • High-current outputs
  • Adaptive fast decay option
  • Adjustable off-time
  • 3.3 and 5 V compatible logic supply
  • Synchronous rectification
  • Internal undervoltage lockout (UVLO)
  • Thermal shutdown circuitry
  • Crossover-current protection
  • Overcurrent protection
  • Low-power sleep mode
  • Low-profile QFN package
A5990 Packages

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A5990 Product Image A5990 Block Diagram A5990 Typical Application

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
A5990GEVSR-T 40-lead QFN/MLP -40°C to 105°C Yes View Data Contact your
local sales rep
Check Stock

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