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MIKROE H-Bridge 8 Click is a compact add-on board that contains H-bridge current regulator. This board features the MP6519, a monolithic, step-down, current-source driver for applications that require accurate and fast current-response control from Monolithic Power Systems (MPS). It achieves excellent load and line regulation over a wide input supply range up to 28V. The four integrated MOSFET H-bridge control provide a fast dynamic load response and an ultra-high efficiency solution. Complete protection features include load open, load-short protection, over-current protection (OCP), over-temperature protection (OTP), and input over-voltage protection (OVP). This Click board™ is suitable as a current-regulator brushed DC motor/solenoid driver for various applications.
H-Bridge 8 Click is supported by a mikroSDK compliant library, which includes functions that simplify software development.
H-Bridge 8 Click as its foundation uses the MP6519, a monolithic current-source driver for applications that require accurate and fast current-response control from Monolithic Power Systems (MPS). The MP6519 works in step-down mode with four fully integrated MOSFET H-bridges to provide small size and high efficiency and uses pulse-width-modulation (PWM) signal with average current control to achieve a bidirectional current output and fast dynamic current response. It also has current polarity controlled by a GPIO pin alongside the programmable switching frequency from 30kHz to 300kHz.
This Click board™ communicates with MCU using several GPIO pins. The Enable pin, labeled as EN and routed to the RST pin of the mikroBUS™ socket, optimizes power consumption and is used for power ON/OFF purposes (driver operation permission). Also, the Forward/Reverse mode or current direction flowing can be selected according to a logic level of the control signal routed to the CS pin of the mikroBUS™ socket, marked as MOD. In addition, the H-Bridge 8 Click also has a fault pin labeled as FLT routed to the INT pin of the mikroBUS™ socket, which indicates the fault condition to the external system if any fault occurs during operation.
The MP6519 can enter four modes to control the working sequence: Shutdown, Standby, Normal Switching, and Current Polarity Mode. In Shutdown mode, all circuits and blocks are disabled, and the MP6519 consumes less than 1μA. Standby is an initial mode in which control blocks begin working except for the gate drive block for the internal switching MOSFETs. Normal Switching mode activates when both PWM and EN pins are at high logic state (active), while Current Polarity mode is set by MOD pin, and determines the polarity of the current, more precisely, the direction of rotation of the motor.
The H-Bridge 8 Click supports an external power supply for the MP6519, which can be connected to the input terminal labeled as VIN and should be within the range of 2.5V to 28V, while the DC motor coils can be connected to the terminals labeled as DCM1 and DCM2.
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.
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