Brushless 16 Click

How does it work?

Brushless 16 Click as its foundation uses the LB11685AV, a three-phase full-wave current-linear-drive motor driver from ON Semiconductor. The LB11685AV adopts a sensorless control system without the use of a Hall-effect device. It features a current soft switching circuit for silent operation. Alongside, it is also characterized by easy control, current limit, and various protection features. This Click board™ makes the perfect solution for delivering quiet, cool operation to home appliances and office automation equipment.

Start-Up Mode is set when the LB11685AV starts up its operation. After the “START” position, the LB11685AV outputs energization timing patterns for a Start-Up in each output (U/V/W) to determine the position of a motor. Based on the timing pattern, the motor starts rotation in which LB11685AV detects back-EMF, which defines a motor position. As a result, the LB11685AV outputs energization timing, which synchronizes with the motor position to the motor. That’s how a motor starts rotation. When the LB11685AV switches from Start-Up Mode to Regular rotation Mode, the driving current is switched to full driving mode, which increases the rotation speed until it is stabilized.

Brushless 12 Click communicates with MCU using several GPIO pins. The device can be enabled or disabled through a dedicated Enable (EN) pin routed on the CS pin of the mikroBUS™ socket while the FG pin routed on the PWM pin serves as a rotation speed indicator and outputs a rectangular waveform in reverse to V motor signal made by back EMF. Besides, it is possible to detect motor lock events on the interrupt RD pin routed to the INT signal of the mikroBUS™ socket, where the indication of such a condition is performed using the red LED indicator labeled as MOTOR LOCK.

Brushless 16 Click supports an external power supply connected to the input terminal labeled as VM, next to the U, V, W, and COM terminals on which the BLDC motor needs to be connected. The absolute maximum rating of the power supply voltage is 19V which must not be exceeded, even for a moment. Do not exceed any of these ratings!

This Click board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. It allows for both 3.3V and 5V capable MCUs to use the communication lines properly. Additionally, there is a possibility for LB11685AV power supply selection via jumper labeled as VFAN SEL to supply the LB11685AV from an external input terminal in the range from 4.5 to 19V or with a 5V from mikroBUS™ power rail.

Specifications

Pinout diagram

This table shows how the pinout on Brushless 16 Click 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	FG	Rotation Speed Indication
	NC	2	RST	INT	15	RD	Motor Lock Detection
Enable	EN	3	CS	RX	14	NC
	NC	4	SCK	TX	13	NC
	NC	5	MISO	SCL	12	NC
	NC	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

Brushless 16 Click electrical specifications

Software Support

We provide a library for the Brushless 16 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for Brushless 16 Click driver.

Key functions:

• brushless16_cfg_setup – Config Object Initialization function.
• brushless16_init – Initialization function.

Examples description

This example showcases ability to enable and disable motor output, and check the status pins.

The application is composed of three sections :

void application_task ( void ) 
{
    static uint16_t timer = 5000;
    static uint8_t state = 1;
    
    if ( brushless16_get_rd( &brushless16 ) )
    {
        log_info( &logger, " Motor Lock" );
        Delay_ms( 500 );
    }
    
    if ( brushless16_get_fg( &brushless16 ) )
    {
        log_info( &logger, " FG" );
        Delay_ms( 500 );
    }
    
    if ( !( timer-- ) )
    {
        timer = 5000;
        
        if ( state )
        {
            log_info( &logger, " Motor stop" );
        }
        else
        {
            log_info( &logger, " Motor rotating" );
        }
        
        brushless16_set_en( &brushless16, state );
        state = !state;
    }
    
    Delay_ms( 1 );
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.Brushless16

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB UART 2 click or RS232 click to connect to your PC, for development systems with no UART to USB interface available on the board. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.

mikroSDK

This Click board™ is supported with mikroSDK – MikroElektronika Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.

For more information about mikroSDK, visit the official page.