Buck-Boost Click

Buck-Boost Click™ features LTC3129-1, a buck-boost DC/DC conversion integrated circuit. The Click supports a wide input voltage range and can output eight discrete regulated output voltage levels, selectable by the digital output voltage selection pins, ranging from 2.5V to 15V.

Click Product page

Click library

• Author : MikroE Team
• Date : Dec 2019.
• Type : GPIO type

Software Support

We provide a library for the BuckBoost 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 BuckBoost Click driver.

Standard key functions :

• Config Object Initialization function.

  void buckboost_cfg_setup ( buckboost_cfg_t *cfg );

• Initialization function.

  BUCKBOOST_RETVAL buckboost_init ( buckboost_t ctx, buckboost_cfg_t cfg );

• Click Default Configuration function.

  void buckboost_default_cfg ( buckboost_t *ctx );

Example key functions :

• This function set fixed frequency PWM operation mode of LTC3129-1 on Buck Boost Click by set PWM pin ( logic 1 ).

  void buckboost_set_mode_fixed_freq ( buckboost_t *ctx );

• This function enables automatic burst mode operation of LTC3129-1 on Buck Boost Click by clear PWM pin ( logic 0 ).

  void buckboost_enables_auto_burst_mode ( buckboost_t *ctx );

• This function set the output voltage of 2500 mV function.

  void buckboost_set_2500mv ( buckboost_t *ctx );

Examples Description

The demo application change output voltage from 2500 mV to 15000 mV every 5 seconds.

The demo application is composed of two sections :

Application Init

Initialization device and set default configuration.

void application_init ( void )
{
    log_cfg_t log_cfg;
    buckboost_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 ----\r\n");

    //  Click initialization.

    buckboost_cfg_setup( &cfg );
    BUCKBOOST_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    buckboost_init( &buckboost, &cfg );

    buckboost_default_cfg( &buckboost );
    log_printf(&logger, "--------------------------------\r\n");
    log_printf(&logger, "        Buck Boost Click        \r\n");
    log_printf(&logger, "--------------------------------\r\n");
    Delay_ms ( 100 );
}

Application Task

This is a example which demonstrates the use of Buck Boost Click board. Change output voltage from 2500 mV to 15000 mV every 5 seconds. All data logs write on usb uart for aproximetly every 5 sec.

void application_task ( void )
{
    log_printf(&logger, " Set Output Voltage of  2500 mV \r\n");
    log_printf(&logger, "--------------------------------\r\n");
    buckboost_set_2500mv( &buckboost );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf(&logger, " Set Output Voltage of  3300 mV \r\n");
    log_printf(&logger, "--------------------------------\r\n");
    buckboost_set_3300mv( &buckboost );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf(&logger, " Set Output Voltage of  4100 mV \r\n");
    log_printf(&logger, "--------------------------------\r\n");
    buckboost_set_4100mv( &buckboost );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf(&logger, " Set Output Voltage of  5000 mV \r\n");
    log_printf(&logger, "--------------------------------\r\n");
    buckboost_set_5000mv( &buckboost );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf(&logger, " Set Output Voltage of  6900 mV \r\n");
    log_printf(&logger, "--------------------------------\r\n");
    buckboost_set_6900mv( &buckboost );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf(&logger, " Set Output Voltage of  8200 mV \r\n");
    log_printf(&logger, "--------------------------------\r\n");
    buckboost_set_8200mv( &buckboost );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf(&logger, " Set Output Voltage of  12000 mV \r\n");
    log_printf(&logger, "--------------------------------\r\n");
    buckboost_set_12000mv( &buckboost );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf(&logger, " Set Output Voltage of  15000 mV \r\n");
    log_printf(&logger, "--------------------------------\r\n");
    buckboost_set_15000mv( &buckboost );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
} 

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.BuckBoost

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.