A3909: Dual Full Bridge Motor Driver

The A3909 is a dual full bridge motor driver, designed for 12 V medium power applications. The outputs are rated for operation through a power supply range of 4 to 18 V, and capable of up to 1 A per phase.

Paralleling the outputs is possible for higher amperage single DC motor applications.

The four inputs (IN1 to IN4) can control DC motors in forward, reverse, brake, and coast modes, or a bipolar stepper motor in full- and half-step modes.

The A3909 is supplied in a 10-pin MSOP package with exposed thermal pad (suffix LY) and a 10-pin SSOP (suffix LN) for wave solder applications. Both packages are lead (Pb) free with 100% matte-tin leadframe plating.


Astrorep Inc. (Allegro and Sanken Semiconductors, Sanken Power Supplies)
700 Veterans Memorial Hwy
Suite 310
Hauppauge, NY 11788
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
  • Low RDS(on) outputs
  • Drives two DC motors or single stepper motor
  • Low power standby (Sleep) mode with zero current drain
  • Thermal shutdown protection
  • Parallel operation option for 1.8 A, single DC motor
  • Overcurrent protection:
    • Output to supply short
    • Output to GND short
    • Output load short

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Product Image Functional Block Diagram

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
APEK3909GLY-01-T DEMO BOARD -20°C to 85°C No -- Contact your
local sales rep
Check Stock
A3909GLNTR-T 10-lead SSOP -40°C to 105°C Yes View Data Contact your
local sales rep
Check Stock
A3909GLYTR-T 10-lead MSOP -40°C to 105°C Yes View Data Contact your
local sales rep
Check Stock

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