ALLEGRO A4919GLPTR-T

A three-phase controller for use with N-channel external power MOSFETs. A unique charge pump regulator provides full (>10 V) gate drive at power supply voltages down to 7 V and allows the device to operate with reduced gate drive at power supply voltages down to 5.5 V. A bootstrap capacitor is used to provide the above power supply voltage required for N-channel MOSFETs. One logic-level input is provided for each of the six power MOSFETs in the 3-phase bridge, allowing motors to be driven with any commutation 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 undervoltage, and chip overtemperature conditions are indicated by a single opendrain fault output. Product variants incorporating a low dropout (LDO) regulator to source either 5.0 V or 3.3 V to external circuitry are available.

• High-current 3-phase gate drive for N-channel MOSFETs
• 5.5 to 50 V supply voltage range
• Regulated logic supply voltage output option
• Low-current Sleep mode option
• Motor phase short-to-supply and short-to-ground detection
• Cross-conduction protection
• Undervoltage, overtemperature monitors

• Lawn and garden equipment
• Battery-operated power tools
• Industrial grinders
• Continuous positive airway pressure (CPAP) machines
• Vacuum cleaners