eFuse 4 Click

eFuse 4 Click is a compact add-on board with a power path protection solution that limits circuit currents and voltages to safe levels during fault conditions. This board features the TPS25940, an eFuse power switch with reverse current blocking from Texas Instruments. The TPS25940 features a full suite of protection and monitoring functions, including a DevSleep™ mode that supports compliance with the SATA™ Device Sleep standard. The wide operating range from 2.7V to 18V allows control of many popular DC bus voltages. The additional potentiometer sets the overload and short-circuit current limit of the TPS25940, while the additional header allows external current monitoring.

Click Product page

Click library

• Author : Nenad Filipovic
• Date : Nov 2022.
• Type : I2C type

Software Support

We provide a library for the eFuse 4 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 eFuse 4 Click driver.

Standard key functions :

• efuse4_cfg_setup Config Object Initialization function.

  void efuse4_cfg_setup ( efuse4_cfg_t *cfg );

• efuse4_init Initialization function.

  err_t efuse4_init ( efuse4_t *ctx, efuse4_cfg_t *cfg );

• efuse4_default_cfg Click Default Configuration function.

  err_t efuse4_default_cfg ( efuse4_t *ctx );

Example key functions :

• efuse4_set_current_limit eFuse 4 set current limit function.

  err_t efuse4_set_current_limit ( efuse4_t *ctx, efuse4_current_limit_t current_limit )

• efuse4_set_resistance eFuse 4 set resistance function.

  err_t efuse4_set_resistance ( efuse4_t *ctx, uint32_t res_ohm );

• efuse4_set_digi_pot eFuse 4 set normal mode function.

  void efuse4_set_normal_mode ( efuse4_t *ctx );

Example Description

This library contains API for the eFuse 4 Click driver. This driver provides the functions to set the current limiting conditions in order to provide the threshold of the fault conditions.

The demo application is composed of two sections :

Application Init

Initialization of I2C module and log UART. After driver initialization, default settings turn on the device.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    efuse4_cfg_t efuse4_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.
    efuse4_cfg_setup( &efuse4_cfg );
    EFUSE4_MAP_MIKROBUS( efuse4_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == efuse4_init( &efuse4, &efuse4_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( EFUSE4_ERROR == efuse4_default_cfg ( &efuse4 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

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

    display_selection( );
    Delay_ms ( 100 );
}

Application Task

This example demonstrates the use of the eFuse 4 Click board™. Reading user's input from UART Terminal and using it as an index for an array of pre-calculated values that define the current limit level. Results are being sent to the UART Terminal, where you can track their changes.

void application_task ( void ) 
{  
    static char index;

    if ( EFUSE4_ERROR != log_read( &logger, &index, 1 ) ) 
    {
        if ( ( index >= '0' ) && ( index <= '6' ) ) 
        {
            efuse4_set_current_limit ( &efuse4, limit_value_op[ index - 48 ] );
            log_printf( &logger, "  >>> Selected mode %d     \r\n", index - 48 );
            log_printf( &logger, "  Current limit is %d mA   \r\n", limit_value_op[ index - 48 ] );
            log_printf( &logger, "---------------------------\r\n" );
            Delay_ms ( 100 );
        }
        else 
        { 
            log_printf( &logger, "    Data not in range!    \r\n" );
            log_printf( &logger, "---------------------------\r\n" );
            display_selection( );
            Delay_ms ( 100 );
        }
    }
}

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.eFuse4

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.