A4910: Automotive 3-Phase MOSFET Driver

The A4910 is a three-phase controller for use with N-channel external power MOSFETs and is specifically designed for automotive applications.

A unique charge pump regulator provides full (>10 V) gate drive for battery voltages down to 7 V, and allows the A4910 to operate with a reduced gate drive down to 5.5 V.

A bootstrap capacitor is used to provide the above battery supply voltage required for N-channel MOSFETs. An internal charge pump for the high-side drive allows DC (100% duty cycle) operation.

Full control over all six power MOSFETs in the 3-phase bridge is provided, allowing motors to be driven with block commutation or sinusoidal excitation. The power MOSFETs are protected from shoot-through by integrated crossover control and programmable dead time.

Current in each half bridge can be measured using integrated current sense amplifiers. These are three user-configurable differential amplifiers, with below ground common mode range and excellent transient response and settling time, allowing them to be used in low-side current sense applications.

Integrated diagnostics provide indication of undervoltage, overtemperature, and power bridge faults, and can be configured to protect the power MOSFETs under most short circuit conditions. Detailed diagnostics are available as a serial data word.

The A4910 is supplied in a small footprint (81 mm2) 48-pin LQFP with exposed thermal pad (suffix JP). It is lead (Pb) free, with 100% matte-tin leadframe plating.

ASIL LogoAllegro's A4910 is a Quality Managed (QM) product that has been developed according to the automotive quality requirements of TS 16949 and contains features targeted for automotive safety applications. This product can be qualified for use in accordance with ISO 26262 in compliant safety systems by ensuring a robust integration of the component into the system design. Safety documentation will be provided to support and guide the integration process.


  • Electronic power steering (EPS, EHPS, EAS)
  • Hydraulic pumps
  • Engine cooling fan
  • Gearbox actuator

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
  • High current 3-phase gate drive for N-channel MOSFETs
  • 3-phase current sense amplifiers
  • SPI compatible serial or direct parallel control
  • Cross conduction protection
  • Programmable dead time
  • Top-off charge pump for 100% PWM
  • Uncommitted buffer amplifier
  • 5.5 to 50 V supply voltage range
  • CMOS inputs, 3.3 to 5 V logic supply
  • Extensive diagnostics output
  • Low-current sleep mode


Design Support Tools

NOTE: When ordering, please also request APEK-USBCBLE-T.

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Product Image Typical Application

Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
APEK4910KJP-01-T DEMO BOARD -20°C to 85°C No -- Contact your
local sales rep
Check Stock
A4910KJPTR-T 48-lead LQFP -40°C to 150°C Yes View Data 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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