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A4919GETTR-T

A4919GETTR-T

Allegro MicroSystems
High-Side, Low-Side Gate Driver IC TTL 28-QFN (5x5)
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Overview

The A4919GETTR-T is a 3-phase N-channel MOSFET gate driver designed to operate over a wide supply range of 5.5V to 50V. It features six independent drivers arranged in three high-side and three low-side pairs, specifically optimized for brushless DC (BLDC) motor control in industrial and automotive-adjacent systems.

Why Choose This Part

This IC provides robust protection features including cross-conduction prevention, overtemperature monitoring, and motor phase short-to-ground/supply detection. Its fast 35ns rise and 20ns fall times ensure efficient high-frequency switching with minimal thermal overhead.

Applications

Brushless DC (BLDC) Motor Control
Driving 3-phase bridges for high-current motors used in power tools, pumps, and fans.
Battery Powered Tools
Utilizing the 15uA low-current Sleep mode to extend battery life in cordless drills and saws.
Industrial Robotics
Managing high-speed switching for robotic arm actuators and small AGV drivetrains.
Electric Mobility
Controlling 3-phase propulsion systems in e-bikes and personal transport vehicles.

Key Specifications

Gate Type MOSFET (N-Channel)
Input Type TTL
Channel Type 3-Phase
Mounting Type Surface Mount
Package / Case 28-VFQFN Exposed Pad
Voltage - Supply 5.5V ~ 50V
Number of Drivers 6
Driven Configuration High-Side, Low-Side
Operating Temperature -40degC ~ 105degC (TA)
Rise / Fall Time (Typ) 35ns, 20ns
Supplier Device Package 28-QFN (5x5)
Logic Voltage - VIL, VIH 0.8V, 1.5V

Getting Started

Ensure proper thermal management by soldering the 28-QFN exposed pad to a large PCB ground plane. When prototyping, use high-quality ceramic bypass capacitors close to the VDD and VCP pins to stabilize the internal charge pump and supply rails.

Also Consider

A4915 Allegro MicroSystems - Provides a simpler interface with an integrated commutation logic for Hall-effect sensor inputs.
MIC4606-2 MCHPMicrochip Technology - A highly compact 85V full-bridge driver suitable for designs requiring higher voltage headroom.