A4964

A4964 2 - Sensorless Sinusoidal Drive BLDC Controller FEATURES AND BENEFITS Three-phase sensorless BLDC motor control FET driver Three-phase sinusoidal drive with soft start Sensorless start-up and commutation Windmill detection and synchronization Bootstrap gate drive for N-channel MOSFET bridge 5.5 to 50 V supply range SPI-compatible interface Programmable control modes: speed, voltage, current Peak current limiting Control via SPI or PWM Programmable gate drive for slew rate control LIN / PWM physical interface with wake Logic supply regulator with current limit MCU watchdog and reset Ignition switch interface Diagnostics, status, current, and speed feedback APPLICATIONS Automotive fuel, oil, and urea pumps Automotive fans and blowers PACKAGES 36-terminal eQFN (suffix EV) 32-lead eQFP (suffix JP) Not to scale DESCRIPTION The A4964 is a three-phase, sensorless, brushless DC (BLDC) motor controller for use with external N-channel power MOSFETs and is specifically designed for automotive applications. It is designed to provide the motor control functions in a system where a small microcontroller provides the communication interface to a central ECU and intelligent fault and status handling. The A4964 provides the supply and watchdog for the microcontroller and the high-voltage interfaces between the microcontroller and the central ECU and ignition switch. The A4964 can also operate as an independent singlechip remote motor controller...