A4964: Sensorless Sinusoidal Drive BLDC Controller

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.

For full article: http://www.allegromicro.com/en/Products/Motor-Driver-And-Interface-ICs/BLDC-Drivers/A4964.aspx