MIKROE DC Motor 20 Click is a compact add-on board that contains a brushed DC motor driver. This board features the TC78H651AFNG, a dual H-bridge driver for one or two DC brushed motors, which incorporates DMOS with low ON resistance in output transistors from Toshiba Semiconductor. The Forward/Reverse/Stop mode can be selected according to the state of its input control signals routed to the GPIO pins of the mikroBUS™ socket. It has a wide operating voltage range of 1.8V to 7.5V with an output current capacity of 2A maximum. Besides, it also features built-in protection against under-voltage, overcurrent, and overtemperature conditions. This Click board™ is suitable for driving DC brushed motors and stepping motors for low voltage equipment.

DC Motor 20 Click is supported by a mikroSDK compliant library, which includes functions that simplify software development.

DC Motor 20 Click as its foundation uses the TC78H651AFNG, a dual H-bridge driver for one or two DC brushed motors from Toshiba Semiconductor. The integrated MOSFETs, which configures with an H-Bridge circuit inside the TC78H651AFNG, use DMOS elements with low-on resistance (0.22Ω typical with 5V power supply). It has a wide operating voltage range with an output current capacity of 2A maximum and control functions including motor-related functions and built-in detection circuits for overcurrent, overheat, and low/high voltage.

As mentioned in the product description, DC Motor 20 Click communicates with MCU using several GPIO pins. Also, this Click board™ has a Standby function used to switch to Standby mode by setting all motor control pins to a low logic state. When the Standby mode is active, the TC78H651AFNG stops supplying the power to the logic circuit. The Standby current is significantly reduced because all circuits in the IC are configured with CMOS/DMOS elements, and the current consumption in this mode is 0μA typical.

To turn ON the internal MOSFETs of the TC78H651AFNG, they need to be switched by the logic level, which is input to the control input pins: IN1, IN2, IN3, and IN4 pins routed to the RST, AN, PWM, and INT pins of the mikroBUS™ socket. Thereby, the Forward/Reverse/Stop rotation direction mode can be selected according to the state of its input control signals. More information on the Motor Rotation Mode Selection can be found in the attached datasheet.

This Click board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use communication lines properly. However, the 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.

• Interface: GPIO
• Compatibility: mikroBUS™
• Dimensions: 42.9 x 25.4mm
• Input Voltage: 3.3V or 5V, External
• Supply Voltage VCC: Min. 3.3V, Max. 5V
• External Power Supply VM: Min. 1.8V, Max. 7.5V
• Maximum Output Current: 2A
• Operating Temperature Range: Min. -40°C, Typ. +25°C, Max. +105°C

• Schematic
• TC78H651AFNG Datasheet
• mikroSDK
• LibStock