Quality Standards and Environmental Certifications

A4910: Automotive 3-Phase MOSFET Driver

Allegero 48 Pin LQFP with exposed thermal pad JP Package

A4910 Datasheet
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Description

Top Features

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.

Allegro recommended automotive-qualified Hall latches: APS122x5 and APS122x0

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.

Applications

  • Electronic power steering (EPS, EHPS, EAS)
  • Hydraulic pumps
  • Engine cooling fan
  • Gearbox actuator
  • 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
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Part Number Specifications and Availability

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

Packaging

Package 

JP Package Documentation

Design Support Tools

Allegro Customer Portal: Gain access to Allegro product software and design tools.

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

A4910 Demo board Schematic/Layout

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