Responding the growth in 3-phase DC motor applications in the automotive and industrial sectors, Allegro MicroSystems Europe has released a 3-phase MOSFET pre-driver IC that it claims is ideal for systems that use sinusoidal control of the motor phase currents. The part has been enhanced to reduce audible noise and minimise torque ripple at the load.
The A4935 integrates a regulating charge pump which provides gate drive capability for battery voltages down to 7 V and reduced gate drive for battery voltages as low as 5.5 V. Other features include an enhanced current sense amplifier, better fault diagnostics and reporting to decode and identify faults. Features such as top-off charge pump and bootstrap charge management make the A4935 easier to manage in terms of ensuring an adequate bootstrap capacitor charge under varying PWM conditions, says Allegro.
The A4935KJP-T is supplied in a small-footprint 48L eLQFP small profile thermally efficient exposed-pad package which is lead (Pb) free with 100% matte tin leadframe plating. A data sheet of this product can be viewed and downloaded from here