Charger 25 click

Charger 25 Click is a compact add-on board that contains a battery charger. This board features the BQ25792, a buck-boost battery charger with a dual-input selector, and a USB PD3.0 OTG output from Texas Instruments. It is fully integrated for 1-4 cell Li-Ion and Li-Polymer batteries. Designed specifically for USB applications, it also includes a Narrow voltage DC (NVDC) power path management in which the system is regulated at a voltage slightly higher than the battery voltage without being allowed to drop below the minimum system voltage.

click Product page

Click library

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

Software Support

We provide a library for the Charger 25 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 Charger 25 Click driver.

Standard key functions :

• charger25_cfg_setup Config Object Initialization function.

  void charger25_cfg_setup ( charger25_cfg_t *cfg );

• charger25_init Initialization function.

  err_t charger25_init ( charger25_t *ctx, charger25_cfg_t *cfg );

• charger25_default_cfg Click Default Configuration function.

  err_t charger25_default_cfg ( charger25_t *ctx );

Example key functions :

• charger25_get_vbat Charger 25 get VBAT function.

  err_t charger25_get_vbat ( charger25_t *ctx, uint16_t *vbat );

• charger25_get_status Charger 25 get charging status function.

  err_t charger25_get_status ( charger25_t *ctx, charger25_status_t *status );

• charger25_get_vbat_lim Charger 25 get battery voltage limit function.

  err_t charger25_get_vbat_lim ( charger25_t *ctx, uint16_t *vtg_lim );

Example Description

This example demonstrates the use of Charger 25 click board™ by enabling battery charging and displaying battery voltage and charging status.

The demo application is composed of two sections :

Application Init

Initialization of I2C module and log UART. After driver initialization, the app executes a default configuration.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    charger25_cfg_t charger25_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.
    charger25_cfg_setup( &charger25_cfg );
    CHARGER25_MAP_MIKROBUS( charger25_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == charger25_init( &charger25, &charger25_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( CHARGER25_ERROR == charger25_default_cfg ( &charger25 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
    log_printf( &logger, " ----------------\r\n" );
    Delay_ms ( 100 );
}

Application Task

The demo application reads and displays the results of the battery voltage, minimal system voltage, battery voltage limit and charging status. Results are being sent to the UART Terminal, where you can track their changes.

void application_task ( void ) 
{
    static uint16_t vtg_data = 0;
    if ( CHARGER25_OK == charger25_get_status ( &charger25, &status ) )
    {
        charger25_display_status( );
    }
    Delay_ms ( 100 );

    if ( CHARGER25_OK == charger25_get_vbat( &charger25, &vtg_data ) )
    {
        log_printf( &logger, " VBAT: %u [mV]\r\n", vtg_data );
    }
    Delay_ms ( 100 );

    if ( CHARGER25_OK == charger25_get_vsys_min( &charger25, &vtg_data ) )
    {
        log_printf( &logger, " VMIN: %u [mV]\r\n", vtg_data );
    }
    Delay_ms ( 100 );

    if ( CHARGER25_OK == charger25_get_vbat_lim( &charger25, &vtg_data ) )
    {
        log_printf( &logger, " VLIM: %u [mV]\r\n", vtg_data );
    }
    log_printf( &logger, " ----------------\r\n" );
    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.Charger25

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.