Buck 2 Click

Buck 2 Click is a powerful step down DC-DC switching regulator. It gives a high precision regulated voltage at its output and it can handle an ample amount of current.

Click Product page

Click library

• Author : Katarina Perendic
• Date : nov 2019.
• Type : GPIO type

Software Support

We provide a library for the Buck2 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 form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for Buck2 Click driver.

Standard key functions :

• Config Object Initialization function.

  void buck2_cfg_setup ( buck2_cfg_t *cfg );

• Initialization function.

  BUCK2_RETVAL buck2_init ( buck2_t ctx, buck2_cfg_t cfg );

• Click Default Configuration function.

  void buck2_default_cfg ( buck2_t *ctx );

Example key functions :

• Function settings output voltage

  void buck2_set_output_voltage ( buck2_t *ctx , uint8_t voltage );

• Function reads state PG pin

  uint8_t buck2_get_power_good ( buck2_t *ctx );

• Function settings chip mode

  void buck2_set_power_mode ( buck2_t *ctx, uint8_t mode );

Examples Description

This application demonstrates the use of Buck 2 Click board.

The demo application is composed of two sections :

Application Init

Initializes the driver and configures the Click board.

void application_init ( void )
{
    log_cfg_t log_cfg;
    buck2_cfg_t cfg;

    /** 
     * 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.

    buck2_cfg_setup( &cfg );
    BUCK2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    buck2_init( &buck2, &cfg );

    buck2_default_cfg( &buck2 );
}

Application Task

Sets a different output voltage every 5 seconds then checks if the voltage on the output (OUTSNS) drops under 90% of the regulated voltage and displays an appropriate message on USB UART.

void application_task ( void )
{
    uint8_t pg_state;

    buck2_set_output_voltage( &buck2, BUCK2_SET_VOLTAGE_3300mV );
    log_printf( &logger, "---- Output voltage is 3300 mV ----\r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    pg_state = buck2_get_power_good( &buck2 );
    if ( pg_state == 0 )
    {
        log_info( &logger, "---- Voltage of the output dropped under 90%% of the regulated voltage ----" );
    }
    buck2_set_output_voltage( &buck2, BUCK2_SET_VOLTAGE_2500mV );
    log_printf( &logger, "---- Output voltage is 2500 mV ----\r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    pg_state = buck2_get_power_good( &buck2 );
    if ( pg_state == 0 )
    {
        log_info( &logger, "---- Voltage of the output dropped under 90%% of the regulated voltage ----" );
    }
    buck2_set_output_voltage( &buck2, BUCK2_SET_VOLTAGE_1800mV );
    log_printf( &logger, "---- Output voltage is 1800 mV ----\r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    pg_state = buck2_get_power_good( &buck2 );
    if ( pg_state == 0 )
    {
        log_info( &logger, "---- Voltage of the output dropped under 90%% of the regulated voltage ----" );
    }
    buck2_set_output_voltage( &buck2, BUCK2_SET_VOLTAGE_1500mV );
    log_printf( &logger, "---- Output voltage is 1500 mV ----\r\n" );
    log_printf( &logger, "-----------------------------------\r\n" );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    pg_state = buck2_get_power_good( &buck2 );
    if ( pg_state == 0 )
    {
        log_info( &logger, "---- Voltage of the output dropped under 90%% of the regulated voltage ----" );
    }
}

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub accaunt.

Other mikroE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.Buck2

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.