DC Motor 11 Click Board™

The DC Motor 11 Click Board™ is optimized for driving brushed DC motors. it integrates an efficient H-Bridge with very low ON resistance of approximately 500mΩ through each branch. An integrated sleep mode is activated when both logic inputs are at a LOW logic level for longer than 1ms, reducing the overall power consumption. A dedicated, high-precision current sensing amplifier IC is used to sense the current through motor coils, allowing the host MCU to perform current monitoring at all times. the DC Motor 11 Click Board™ is perfectly suited for rapid development of various DC motor driving applications, including home appliances, printers, industrial equipment, mechatronic applications, etc.

How Does The DC Motor 11 Click Board™ Work?

The DC Motor 11 Click Board™ is designed around the DRV8830, a Low-Voltage Motor Driver With Serial Interface, by Texas Instruments. This IC is actually an integrated H-Bridge driver with the current regulation circuit that allows limiting the current through the connected load, with just a single resistor. A very low ON resistance through the H-Bridge reduces the overall power dissipation, while an advanced control circuit injects dead-time intervals, whenever the outputs change their state, preventing current shoot-throughs. The DRV8830 integrates a set of protection features, including undervoltage, overcurrent, and overtemperature protection. Each of these events will cause the H-Bridge MOSFETs to be disabled. After a fault condition has been removed, the device will continue its operation.

The DRV8830 includes an internal reference voltage that is connected to a DAC. This DAC generates a voltage which is used to set the PWM regulated output voltage, and therefore speed and direction of the motor rotation. The DAC is controlled by the VSET bits from the I2C interface. For the detailed commands for desired output voltages, refer to DRV8830 datasheet.

The DC Motor 11 Click Board™ uses I2C interface to communicate with the main MCU, as well as fault pin (FLT), which is routed to the INT pin of the mikroBUS™ socket. I2C address can be selected using an additional SMD jumpers (JP1 and JP2), labeled as ADDR SEL, determining the least significant bits of the DRV8830 slave I2C address.

Although the DRV8830 supports up to 1A Maximum DC/RMS or Peak Drive Current Current through the connected load, it is limited to maximum 0.6A. Higher current will cause the overcurrent protection to be activated. Peak current through the motor is limited to about 1A, ensuring reliable spin-up while preventing the overcurrent protection to be activated, even if a large load torque is applied. Although there is a very low resistance across the H-Bridge, the current should be monitored to prevent excessive heating in situations where the load is reasonably high.

The DC Motor 11 Click Board™ can operate with 3.3V MCUs only, it is set to work over the I2C by default, and it is already equipped with the pull-up resistors. It is ready to be used as soon as it is inserted into a mikroBUS™ socket of the development system.

SPECIFICATIONS

PINOUT DIAGRAM

This table shows how the pinout of the DC Motor 11 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
NC	1	AN	PWM	16	NC
NC	2	RST	INT	15	FLT	Fault Output
NC	3	CS	RX	14	NC
NC	4	SCK	TX	13	NC
NC	5	MISO	SCL	12	SCL	I2C Clock
NC	6	MOSI	SDA	11	SDA	I2C Data
Power supply	3V	7	3.3V	5V	10	NC
Ground	GND	8	GND	GND	9	GND	Ground

ONBOARD SETTINGS AND INDICATORS

DC MOTOR 11 CLICK ELECTRICAL SPECIFICATIONS