MIKROE H-Bridge 9 Click is a compact add-on board that contains six MOSFET half-bridge outputs. This board features the L99UDL01, a six-channel half-bridge driver monolithic integrated circuit that is PWM configurable and current regulated from STMicroelectronics. It achieves excellent load and line regulation over a wide input supply range up to 18V. These six integrated MOSFET H-bridges are commanded entirely by the SPI interface using duration and current level commands. Complete protection features include open load, short to battery and ground, and load integrity via 10-bit current feedback. This Click board™ is suitable as a multiple brushed DC motor driver for various applications.
H-Bridge 9 Click is supported by a mikroSDK compliant library, which includes functions that simplify software development.
H-Bridge 9 Click as its foundation uses the L99UDL01, a half-bridge driver that is PWM configurable and current regulated from STMicroelectronics. The device contains six MOSFET half-bridge outputs and protection and diagnostic functions designed to improve safety and simplify the design. As a complete solution, this Click board™ replaces several separate motor drivers along with their associated analog and passive components, offering at the same time a more sophisticated functionality.
The L99UDL01 can enter four different operating modes to control the working sequence: Normal mode, Sleep mode, Emergency override mode, and Standby mode as its default operation. In the Sleep mode, no-active circuitry is supplied, where logic is initialized but not operational. There is no function present in either mode to minimize the current consumption. Only wake-up circuitry is active in the Standby mode. Also, an emergency mode represents a crash override mechanism that will interrupt any current actuation command in progress and drives outputs according to the programmed values in the command and configuration registers.
Benefits are further enhanced by PWM control of the output current and sophisticated diagnostic functions that can detect over-currents, line breaks, and short circuits to the battery and ground. The load-integrity tests can also be performed without activating the load. Also, programmable current limiting gives users the ability to reduce the load, thereby increasing reliability. The output MOSFETs are fully protected with low RDS(ON) values, increasing energy efficiency and facilitating thermal management.
The L99UDL01 communicates with MCU using the standard SPI serial interface with a maximum frequency of 4MHz, supporting the most common SPI mode, SPI Mode 0. It also features an interrupt function, labeled as DO and routed to the INT pin of the mikroBUS™ socket that provides the host processor with a real-time fault indication. Besides an interrupt pin, Enable pin labeled as ENO and routed to the PWM pin of the mikroBUS™ socket enables the output functionality while held high and disables the outputs when kept low. This pin can also be used to initiate an output timed actuation, based on programmed parameters, on a rising edge.
The H-Bridge 9 Click supports an external power supply for the L99UDL01, which can be connected to the input terminal labeled as VS and should be within the range of 6V to 18V, while the DC motor coils can be connected to the terminals labeled from O1 to O6. These outputs are configured as switching drivers incorporating active re-circulation to minimize power dissipation. It also has over-current protection, under-current detection, and OFF-state diagnostics.
This Click board™ can operate with both 3.3V and 5V logic voltage levels selected via the JP1 jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the SPI 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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