HOW DOES IT WORK?

Brushless 27 Click is based on the TMC6300, a power driver for BLDC/PMSM motors from Analog Devices. It integrates a charge pump and ultra-low standby current, ensuring the best efficiency and longest battery life. The 3-phase driver offers three half-bridges with individual enable signals for low-side and high-side. It is optimized for BLDC motor control, as well as control of other magnetic actuators. Each MOSFET of each half-bridge can be individually switched on and off. Internal break-before-make (BBM) logic ensures that no cross-conduction occurs.

The driver operates a BLDC motor with a block or sine-commutation using 6-line control from the PCA9538, a low-voltage 8-bit I/O port from NXP. The foot-points of the motor driver are connected via a sense resistor to the LMV321, a low-voltage rail-to-rail output operational amplifier from Texas Instruments. This OP-AMP allows current measurement of the motor to control or limit motor torque. You can change this sense resistor (R9) to set other maximum motor current values according to the table at the bottom of the Brushless 27 Click. The external power supply in a range of 2 – 11V can be connected over the INPUT screw terminal.

Brushless 27 Click uses a standard 2-wire I2C interface of the PCA9538 to communicate with the host MCU, supporting clock frequency of up to 400kHz. The I2C address can be selected over the ADDR SEL jumpers. The I/O prot can be reset over the RST pin, while the host MCU can measure the current over the SEN pin. The diagnostic output signals any overcurrent or overtemperature condition over the INT pin.

This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.

SPECIFICATIONS