Worcester, Mass. Allegro MicroSystems has introduced an automotive-grade, three-phase MOSFET pre-driver IC targeted at automotive and industrial applications. This new device is a third generation three-phase driver that touts enhanced performance and operational features over its predecessors. The new robust design is suitable for systems that use sinusoidal control of the motor phase currents. This commutation method provides smooth operation, reducing audible noise and minimizing torque ripple at the load, Allegro MicroSystems said.
Targeted at three-phase BLDC motors in automotive and industrial applications, the A4935 device integrates a regulating charge pump, which provides full gate drive capability for battery voltages (Vbb) down to 7 V and reduced gate drive for battery voltages as low as 5.5 V. It also includes performance enhancements of the current sense amplifier, as well as better fault diagnostics and reporting to decode and identify faults.
In addition, features such as top-off charge pump and boot strap charge management make this new device much easier to manage in terms of ensuring an adequate boot capacitor charge under varying PWM conditions. The A4935KJP-T is supplied in a 48L eLQFP small profile, thermally efficient exposed pad package.
Pricing: $2.74 in quantities of 1,000.
Availability: Lead time is 12 weeks.
Product information: A4935KJP-T
Allegro MicroSystems Inc. , www.allegromicro.com