AMT49105 Datasheet | Allegro MicroSystems

FEATURES AND BENEFITS - 3-phase bridge MOSFET driver - Bootstrap gate drive for N-channel MOSFET bridge - Cross-conduction protection with adjustable dead time - Charge pump for low supply voltage operation - Programmable gate drive voltage and strength - 5.5 to 50 V supply voltage operating range - Integrated logic supply - Current sense amplifier with programmable gain and offset - SPI-patible serial interface - Bridge control by direct logic inputs or serial interface - Integrated bemf state parators - LIN/PWM physical interface with Wake - Programmable logic supply regulator with current limit - MCU Window watchdog and reset - Ignition switch interface - Diagnostics, status, voltage, and temperature feedback - Developed in accordance with ISO 26262 APPLICATIONS - Automotive fuel, oil, and urea pumps - Automotive fans and blowers PACKAGES: 48-pin QFN with exposed thermal pad and wettable flank (suffix EV) Not to scale DESCRIPTION The AMT49105 is an N-channel power MOSFET driver capable of controlling MOSFETs connected in a three-phase bridge arrangement and is specifically designed for automotive applications with high-power inductive loads such as BLDC motors. Full control over all six power MOSFETs in the threephase bridge is provided, allowing motors to be driven with block mutation or sinusoidal excitation. The AMT49105 is designed to provide the gate drive, supply, and peripheral functions in a system where a small microcontroller provides the motor control, munication interface to a central ECU and intelligent fault and status handling. The AMT49105 provides the supply and watchdog for the microcontroller and the high voltage interfaces between the microcontroller and the central ECU and ignition switch. An ISO17987 (LIN 2.X) and SAE J2602 pliant physical interface is provided for systems using LIN bus munications. This can also operate as a PWM interface for PWM munication systems. A unique charge pump regulator provides the supply for the MOSFET gate...