A4919 - Allegro MicroSystems

A4919 Three-Phase MOSFET Driver

The A4919 is 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 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 requir.

Features

• 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 APPLICATIONS
• Lawn and garden equipment
• Battery-operated power tools
• Industrial grinders
• Continuous positive airway pressure (CPAP) machines
• Vacuum cleaners PACKAGE: 28-pin TSSOP with exposed thermal pad (suffix LP) 28-terminal 5 mm × 5 mm QFN with exposed thermal pad (suffix ET) Not to sc.