Allegro MicroSystems announces 4x4mm 50 V full-bridge gate drivers

Posted 18 May 2022

Allegro MicroSystems announced two new full-bridge gate drivers for automotive and industrial applications.

Available with direct control (A89505) and pulse-width modulation (A89506) options, these devices up-integrate critical features to make system design easier, replacing mechanical relays with solid-state drivers to improve performance and reliability.

With built-in capabilities including flexible interface logic, EMI mitigation with programmable gate drive, motor current feedback and multiple diagnostic features, these devices require very few external components and are available in a 4×4 mm QFN package, 36% smaller than comparable 5×5 mm devices.

The A89505 and A89506 are ideal for vehicle applications such as window and door actuators, EV charger locks, electronic parking brakes, and folding mirrors. Their solid-state design also makes them ideal for battery-powered applications that incorporate brushed DC motors such as building automation and robotics, improving reliability and battery life while facilitating smaller design footprints.

Both drivers include built-in current sensing capabilities, eliminating the need for external current sense resistors and reducing external component requirements to as few as seven. Integrated diagnostics further obviate the need for additional microprocessor programming and addition circuitry.



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