A4919GLPTR-5-T | Gate Driver ICs

Three-Phase MOSFET Driver, A4919GLPTR-5-T, Allegro

The A4919 is a three-phase controller for use with an N-channel external power MOSFET. A unique charge pump regulator provides full (>10 V) gate drive at power supply voltages down to 7 V and allows the A4919 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 the N-channel MOSFET.

One logic-level input is provided for each of the six power MOSFETs in the 3-phase bridge, allowing a motor to be driven with any commutation scheme defined by an external controller. The power MOSFET is protected from cross-conduction by integrated crossover control. Motor phase short-to-supply and short-to-ground detection is provided by an independent drain-source voltage monitor on the MOSFET. Short faults, supply undervoltage, and chip overtemperature conditions are indicated by a single open-collector fault output.

Features

• 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

Applications

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