Full-bridge gate IC drives automotive power MOSFETs

Posted By : Barney Scott
Full-bridge gate IC drives automotive power MOSFETs

The A5929 from Allegro is a full-bridge gate driver IC designed to drive N-channel external power MOSFETs in automotive applications including Integrated Starter Generator (ISG) systems. The device incorporates a specially designed charge pump regulator that provides a full gate drive voltage of greater than 10V at battery voltages down to 7V and allows operation with reduced gate drive at battery voltages down to 5.5V.

A bootstrap capacitor is used to provide the 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-circuit faults, supply undervoltage, and chip overtemperature 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% matt-tin lead frame plating (suffix -T).


You must be logged in to comment

Write a comment

No comments

Sign up to view our publications

Sign up

Sign up to view our downloads

Sign up

SPS IPC Drives 2019
26th November 2019
Germany Nuremberg Messe
Vietnam International Defense & Security Exhibition 2020
4th March 2020
Vietnam National Convention Center, Hanoi