H-Bridge 12 Click Board™

Product Code: MIKROE-5690

How Does The H Bridge 12 Click Board™ Work? The H Bridge 12 Click Board™ is based on the DRV8823, a four-bridge serial interface motor driver from Texas Instruments. Internally, the motor driver consists of four NMOS H-Bridges, a micro-stepping indexer, and various fault-protecting features. The motor driver is fully protected against overcurrent, overtemperature, undervoltage, and comes in a thermally-enhanced package. It can control motors that operate in an 8V to 32V voltage range, with up to 1.5A of current per winding. For this, it uses an internal charge pump for the gate drives. Eight current levels set through the serial interface allow micro-stepping with bipolar stepper motors. The H Bridge 12 Click Board™ uses a simple 3-Wire SPI serial interface to communicate with the host MCU. In addition, this Click board™ uses some other pins from the mikroBUS™ socket, such as the RST pin for the device reset. The motor driver outputs can be disabled with the STB's pin LOW logic state while resetting the serial interface.

Another neat feature is sleep, which can be activated with logic LOW on the SLP pin of the mikroBUS™ socket. There are two precision potentiometers labelled VREFA and VREFC. The VREFA supplies the referent voltage for setting the current trip threshold for bridges A and B, while the VREFC supplies the referent voltage for setting the current trip threshold for bridges C and D. The H Bridge 12 Click Board™ comes with screw terminals for connecting an external motor power supply, labelled with ground and VM. The motors can be connected to 8 terminals appropriately labelled for every motor output channel. The motor driver supports Brushed DC, Brushless DC, and Stepper motors. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the 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 It can be used for the development of printers, scanners, office automation, factory automation, and more On-board modules DRV8823 - a 4-bridge serial interface motor driver from Texas Instruments Key Features Four half-bridges for a broad operating supply voltage range, up to 1.5A of current per winding, protection features, additional current-set threshold potentiometers, low power consumption, internal charge pump for gate drivers, and more Interface SPI Compatibility mikroBUS Click board size L (57.15 x 25.4 mm) Input Voltage 3.3V or 5V PINOUT DIAGRAM This table shows how the H Bridge 12 Click Board™ pinout corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes Pin Pin Notes Serial Data Strobe STB 1 AN PWM 16 SLP Sleep Mode Reset RST 2 RST INT 15 NC SPI Chip Select CS 3 CS RX 14 NC SPI Clock SCK 4 SCK TX 13 NC NC 5 MISO SCL 12 NC SPI Data IN SDI 6 MOSI SDA 11 NC Power Supply 3.3V 7 3.3V 5V 10 5V Power Supply Ground GND 8 GND GND 9 GND Ground ONBOARD SETTINGS AND INDICATORS Label Name Default Description LD1 PWR - Power LED Indicator JP1 VCC SEL Left Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V P1 VREFA - Current trip threshold potentiometer for A/B channels P2 VREFC -