Current Limit 5 Click

Current Limit 5 Click is a compact add-on board representing a current-limiting solution. This board features the MIC2099, a current-limit power distribution switch from Microchip Technology. This Click board™ represents a programmable current limit solution with various protection features and fault indication, which operates from a 2.5V to 5.5V input voltage range. Also, the current limit is adjustable from 100mA up to 1.05A programmed through the MCP4561 digital potentiometer. This Click board™ is suitable for applications in portable equipment and condition monitoring or power supplies, protecting them in short circuits or other overload conditions.

Click Product page

Click library

• Author : Stefan Filipovic
• Date : Jan 2022.
• Type : I2C type

Software Support

We provide a library for the Current Limit 5 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 Current Limit 5 Click driver.

Standard key functions :

• currentlimit5_cfg_setup Config Object Initialization function.

  void currentlimit5_cfg_setup ( currentlimit5_cfg_t *cfg );

• currentlimit5_init Initialization function.

  err_t currentlimit5_init ( currentlimit5_t *ctx, currentlimit5_cfg_t *cfg );

Example key functions :

• currentlimit5_set_ilimit This function sets the current limit value by configuring the onboard digital potentiometer.

  err_t currentlimit5_set_ilimit ( currentlimit5_t *ctx, currentlimit5_ilimit_t ilimit );

• currentlimit5_get_fault_pin This function returns the fault pin logic state.

  uint8_t currentlimit5_get_fault_pin ( currentlimit5_t *ctx );

• currentlimit5_enable_limit This function enables the current limiting switch.

  void currentlimit5_enable_limit ( currentlimit5_t *ctx );

Example Description

This example demonstrates the use of Current Limit 5 Click board by limiting the current to a certain value and displaying an appropriate message when the current reaches the limit.

The demo application is composed of two sections :

Application Init

Initializes the driver and performs the Click default configuration which sets the current limit to 200mA.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    currentlimit5_cfg_t currentlimit5_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.
    currentlimit5_cfg_setup( &currentlimit5_cfg );
    CURRENTLIMIT5_MAP_MIKROBUS( currentlimit5_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == currentlimit5_init( &currentlimit5, &currentlimit5_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( CURRENTLIMIT5_ERROR == currentlimit5_default_cfg ( &currentlimit5 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
}

Application Task

Displays the fault indicator state on the USB UART.

void application_task ( void )
{
    static uint8_t currentlimit_ind = 2;
    if ( currentlimit5_get_fault_pin ( &currentlimit5 ) )
    {
        if ( currentlimit_ind != 0 )
        {
            log_printf ( &logger, " The switch is in normal operation \r\n\n" );
            currentlimit_ind = 0;
        }
    }
    else
    {
        if ( currentlimit_ind != 1 )
        {
            log_printf ( &logger, " The switch is in the current limiting or thermal shutdown operation \r\n\n" );
            currentlimit_ind = 1;
        }
    }
}

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.CurrentLimit5

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.