A4956: Full-Bridge PWM Gate Driver

Designed for pulse-width-modulated (PWM) control of DC motors, the A4956 is capable of 50 V operation and provides gate drive for an all n-channel external MOSFET bridge.

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 VDS protection, thermal shutdown with hysteresis, undervoltage monitoring of VBB, and crossover-current protection.

The A4956 is supplied in a low-profile 4×4 mm, 20-contact QFN package (suffix “ES”) and a 20-lead eTSSOP (suffix “LP”), both with exposed thermal pad.


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.

We'll notify you when there are updates to this product. Sign Up
  • Features and BenefitsFeatures and Benefits
  • PackagingPackaging
  • Technical DocsTechnical Docs
  • NewsNews
  • PHASE/ENABLE/MODE control logic
  • Overcurrent indication
  • Adjustable off-time and blank-time
  • Adjustable current limit
  • Adjustable gate drive
  • Synchronous rectification
  • Internal UVLO
  • Crossover-current protection
  • MOSFET VDS protection
  • Voltage output proportional to load current
  • Decay-mode selection for external PWM
  • A4956K is AEC-Q100 Grade 1 qualified
  • Commercial temperature grade (A4956G: –40°C to 105°C)
  • Automotive temperature grade (A4956K: –40°C to 125°C)

Click the image to view larger
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
APEK4956ES-01-T DEMO BOARD -40°C to 85°C No -- Contact your
local sales rep
Check Stock
A4956GESTR-T 20-lead QFN -40°C to 105°C Yes View Data Contact your
local sales rep
Check Stock
A4956GLPTR-T 20-lead TSSOP -40°C to 105°C Yes View Data Contact your
local sales rep
Check Stock
A4956KLPTR-T 20-lead TSSOP -40°C to 125°C Yes View Data Contact your
local sales rep
Check Stock
APEK4956LP-01-T DEMO BOARD -40°C to 125°C No -- Contact your
local sales rep
Check 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.

Copyright © 2018 Allegro MicroSystems, LLC

Sitemap  |  Privacy Policy  |  Contact Webmaster

Follow us on: LinkedIn YouTube Google+ Follow Allegro on Twitter

Careers   |   Contact Sales   |   Home   |   Legal   |   Quality & Environment   |   Request Samples