Smart Buck 3 Click

Smart Buck 3 Click is a compact add-on board that contains a high-frequency synchronous step-down DC-DC converter. This board features the TPS62366A, a processor supply with I2C compatible interface and a remote sense from Texas Instruments. As input, it uses voltages in the range of 2.5V up to 5.5V, including support for common battery technologies. As output, the converter can scale voltage from 0.5V up to 1.77V in 10mV steps, retaining up to 2.5A peak output current, operating at 2.5MHz of the typical switching frequency.

Click Product page

Click library

• Author : Nenad Filipovic
• Date : Jan 2023.
• Type : I2C type

Software Support

We provide a library for the Smart Buck 3 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 Smart Buck 3 Click driver.

Standard key functions :

• smartbuck3_cfg_setup Config Object Initialization function.

  void smartbuck3_cfg_setup ( smartbuck3_cfg_t *cfg );

• smartbuck3_init Initialization function.

  err_t smartbuck3_init ( smartbuck3_t *ctx, smartbuck3_cfg_t *cfg );

• smartbuck3_default_cfg Click Default Configuration function.

  err_t smartbuck3_default_cfg ( smartbuck3_t *ctx );

Example key functions :

• smartbuck3_set_voltage Smart Buck 3 set voltage function.

  err_t smartbuck3_set_voltage ( smartbuck3_t *ctx, uint16_t vout_mv );

• smartbuck3_get_voltage Smart Buck 3 get voltage function.

  err_t smartbuck3_get_voltage ( smartbuck3_t *ctx, uint16_t *vout_mv );

• smartbuck3_set_operation_mode Smart Buck 3 set operation mode function.

  err_t smartbuck3_set_operation_mode ( smartbuck3_t *ctx, uint8_t op_mode );

Example Description

This example demonstrates the use of Smart Buck 3 Click board™. This driver provides functions for device configurations and for the sets and reads the output voltage.

The demo application is composed of two sections :

Application Init

Initialization of I2C module and log UART. After initializing the driver, the default configuration is executed and the device is turned on.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    smartbuck3_cfg_t smartbuck3_cfg;  /**< Click config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.
    smartbuck3_cfg_setup( &smartbuck3_cfg );
    SMARTBUCK3_MAP_MIKROBUS( smartbuck3_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == smartbuck3_init( &smartbuck3, &smartbuck3_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    Delay_ms ( 100 );

    if ( SMARTBUCK3_ERROR == smartbuck3_default_cfg ( &smartbuck3 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    Delay_ms ( 100 );
    log_info( &logger, " Application Task " );
    vout_mv = SMARTBUCK3_VOUT_MIN;
}

Application Task

This example demonstrates the use of the Smart Buck 3 Click board™. Changes the output voltage every 3 seconds and displays the current voltage output value. Results are sent to the UART Terminal, where you can track their changes.

void application_task ( void ) 
{
    if ( SMARTBUCK3_OK == smartbuck3_set_voltage( &smartbuck3, vout_mv ) )
    {
        Delay_ms ( 100 );
        if ( SMARTBUCK3_OK == smartbuck3_get_voltage( &smartbuck3, &vout_mv ) )
        {
            log_printf ( &logger, " Vout: %u mV\r\n", vout_mv );    
        }
    }
    vout_mv += 100;
    if ( vout_mv > SMARTBUCK3_VOUT_MAX )
    {
        vout_mv = SMARTBUCK3_VOUT_MIN;
    }
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

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.SmartBuck3

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. UART terminal is available in all MikroElektronika compilers.