MLX81205/07/10/15

Product Abstract

Page 13 of 18

Rev 3.9

TFR / CPA

11-May-2012

4.5

Sensor-less BLDC Motor Control via a CAN-Bus-Interface

In this sample application the MLX81215 can realize the sensor-less driving of a BLDC motor via a CAN-Bus

Interface. System wake-up on CAN-bus traffic is possible. The 5V and a 3.3V voltage supply needed for the

CAN-Bus, is generated via external N-FET control in order to limit the power dissipation in the package.

The motor current can be monitored via shunt resistors in the ground and battery path in case the application

requests a double side monitoring for security reasons.

Application programming on module level via the CAN-Bus is supported by the SPI-Interface.

Figure 6 – Typical BLDC Motor Control Application Example on the CAN-Bus with MLX81215