Allegro Microsystems, LLC Announces New Automotive Full Bridge Gate Driver IC with Fault and Independent Enable Functions

Designed for Use in Integrated Starter Generator (ISG) Applications

August 25, 2015

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Worcester, MA – Allegro MicroSystems, LLC announces a new full-bridge controller for use with N-channel external power MOSFETs that has been specifically designed for automotive applications. Allegro’s A5929 has a unique charge pump regulator that provides full (>10 V) gate drive at battery voltages down to 7 V and allows the device to operate with reduced gate drive at battery voltages down to 5.5 V.  A bootstrap capacitor is used to provide the above battery supply voltage required for N-channel MOSFETs.

One logic level input is provided for each of the four power MOSFETs in the full-bridge, allowing motors to be driven with any PWM scheme defined by an external controller. The power MOSFETs are protected from cross-conduction by integrated crossover control. Motor phase short-to-supply and short-to-ground detection is provided by independent drain-source voltage monitors on each MOSFET. Short faults, supply under-voltage, and chip over-temperature conditions are indicated by a single open drain fault output.

The A5929KLPTR-T is supplied in a 24-pin TSSOP power pack­age with an exposed thermal pad (package type LP) for enhanced power dissipation. This package is available in lead (Pb) free versions, with 100% matte-tin lead frame plating (suffix –T).



Allegro MicroSystems, LLC is a leader in developing, manufacturing and marketing high-performance semiconductors. Allegro's innovative solutions serve high-growth applications within the automotive market, with additional focus on office automation, industrial, and consumer/communications solutions. Allegro is headquartered in Worcester, Massachusetts (USA) with design, applications, and sales support centers located worldwide. Further information about Allegro can be found at www.allegromicro.com.


Editorial Contact:

Stephanie Fennelly
Director - Marketing Communications
Tel: (508) 854-5363
sfennelly@allegromicro.com
.

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