A4926: Automotive Half-Bridge MOSFET Driver

The A4926 is an N-channel power MOSFET driver capable of controlling MOSFETs connected in a half-bridge arrangement and is specifically designed for automotive applications with high-power inductive loads, such as brush DC motors solenoids and actuators.

The A4926 is intended for automotive systems that must meet ASIL requirements. In common with other Allegro A2SIL™ products, this device incorporates features to complement proper system design, allowing users to achieve the required ASIL level.

A unique charge pump regulator provides full gate drive for battery voltages down to 5.5 V for most applications. A bootstrap capacitor is used to provide the above-battery supply voltage required for N-channel MOSFETs.

The half bridge can be controlled by independent logic-level inputs or through the SPI-compatible serial interface. The external power MOSFETs are protected from shoot-through by a programmable dead time.

Integrated diagnostics provide indication of multiple internal faults, system faults, and power bridge faults, and can be configured to protect the power MOSFETs under most shortcircuit conditions.

In addition to providing full access to the bridge control, the serial interface is also used to alter programmable settings such as dead time, VDS threshold, and fault blank time. Detailed diagnostic information can be read through the serial interface.

The A4926 is supplied in a 20-lead eTSSOP (suffix LP). This package is lead (Pb) free, with 100% matte-tin leadframe plating (suffix –T).

ASIL LogoAllegro’s A4926 is an ASIL-B product that has been developed in accordance to ISO26262 and contains features targeted for automotive safety applications. This product can be used in accordance with ISO 26262 in compliant safety systems by ensuring a robust integration of the component into the system design. Safety documentation can be provided to support and guide the integration process.

 

Applications

  • Anti-lock braking systems (ABS)
  • HVAC (blower fan)
  • DC pumps (fuel, oil, water)
  • Solenoids and actuators
  • Similar industrial applications
DATASHEETS
SAMPLE & BUY

Digi-Key Corporation (Distributor, Allegro & Sanken Products)
701 Brooks Avenue South
Thief River Falls, MN 56701
United States
Phone: 800-344-4539 or 218-681-6674
Fax: 218-681-3380
Web: www.digikey.com
Email: webmaster@digikey.com

Digi-Key Corporation (Distributor, Allegro & Sanken Products)
701 Brooks Avenue South
Thief River Falls, MN 56701
United States
Phone: 800-344-4539 or 218-681-6674
Fax: 218-681-3380
Web: www.digikey.com
Email: webmaster@digikey.com

Digi-Key Corporation (Distributor, Allegro & Sanken Products)
701 Brooks Avenue South
Thief River Falls, MN 56701
United States
Phone: 800-344-4539 or 218-681-6674
Fax: 218-681-3380
Web: www.digikey.com
Email: webmaster@digikey.com

Digi-Key Corporation (Distributor, Allegro & Sanken Products)
701 Brooks Avenue South
Thief River Falls, MN 56701
United States
Phone: 800-344-4539 or 218-681-6674
Fax: 218-681-3380
Web: www.digikey.com
Email: webmaster@digikey.com

Digi-Key Corporation (Distributor, Allegro & Sanken Products)
701 Brooks Avenue South
Thief River Falls, MN 56701
United States
Phone: 800-344-4539 or 218-681-6674
Fax: 218-681-3380
Web: www.digikey.com
Email: webmaster@digikey.com

Digi-Key Corporation (Distributor, Allegro & Sanken Products)
701 Brooks Avenue South
Thief River Falls, MN 56701
United States
Phone: 800-344-4539 or 218-681-6674
Fax: 218-681-3380
Web: www.digikey.com
Email: webmaster@digikey.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
  • Half-bridge MOSFET driver
  • Bootstrap gate drive for N-channel MOSFET bridge
  • Cross-conduction protection with adjustable dead time
  • Charge pump regulator for low supply voltage operation
  • 5.5 to 50 V supply voltage operating range
  • SPI-compatible serial interface
  • Bridge control by direct logic inputs or serial interface
  • Programmable gate drive
  • Programmable diagnostics
  • A2SIL product—device features for safety-critical systems
A4926 Packages

Design Support Tools

Click the image to view larger
A4926 Product Image A4926 Block Diagram A4926 Typical Application

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
A4926KLPTR-T 20-lead TSSOP -40°C to 125°C Yes View Data New Contact your
local sales rep
Check Stock
APEK4926KLP-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.

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