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 (over 10V) gate drive at battery voltages down to 7V and allows the device to operate with reduced gate drive at battery voltages down to 5.5V. A bootstrap capacitor is used to provide the above battery supply voltage required for N-channel MOSFETs.
Recommended: 4:1 Input 15W and 20W 1X1 Inch DC-DC Converters
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.
Comments are closed.
