H-Bridge 9 Click Board™

Product Code: MIKROE-4821

How Does The H-Bridge 9 Click Board™ Work? The H-Bridge 9 Click Board™ 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 Board™ 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. The H-Bridge 9 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. Specifications Type Brushed Applications Can be used as a multiple brushed DC motor driver for various applications On-board modules L99UDL01 - multiple half-bridge driver that is PWM configurable and current regulated from STMicroelectronics Key Features Six integrated fully protected half bridges, several operational modes, low power consumption, high level of programming, high level diagnostics, protection features, and more Interface SPI Compatibility mikroBUS Click board size L (57.15 x 25.4 mm) Input Voltage 3.3V or 5V,External Pinout diagram This table shows how the pinout on the H-Bridge 9 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 ENO Enable NC 2 RST INT 15 DO Fault Indication SPI Chip Select CS 3 CS RX 14 NC SPI Clock SCK 4 SCK TX 13 NC SPI Data OUT SDO 5 MISO SCL