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mikroSDK Library

Buck 11 click

Rating:

5

Author: MikroElektronika Team

Last Updated: 2019-02-18

Category: Buck

Downloaded: 373 times

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License: MIT license  

Buck 11 click is a high-efficiency step-down converter which provides 3.3V on its output, derived from the connected power supply voltage, in the range from 4.2V to 60V.

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mikroSDK Library Blog

Buck 11 click

Buck 11 click

Native view of the Buck 11 Click board.

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Buck 11 click

Buck 11 click

Front and back view of the Buck 11 Click board.

View full image

Library Description

The library allows user to perform the VOUT measurement of the Buck 11 Click board. One measurement cycle can consist a one conversion or more averaged conversions. This library also allows user to enter a real measured reference voltage for the AD conversion (VDD). For more details check documentation.

Key functions:

  • void buck11_set_vdd_value( float vdd_volts ) - This function allows user to set VDD voltage to the desired (measured) value.
  • uint16_t buck11_read_adc( void ) - This function reads the results of the AD conversion from the MCP3221A5T 12-bit converter.
  • float buck11_get_vout( uint8_t vout_resolution ) - This function allows user to get VOUT voltage value in the desired unit resolution, volts or millivolts.

Examples description

The application is composed of the three sections :

  • System Initialization - Initializes peripherals and pins.
  • Application Initialization - Initializes I2C serial interface and selects the desired VDD voltage value and VOUT value resolution (to get VOUT value in Volts). Note : The user should measure the VDD voltage value and enter this measured value to the function as VDD value to get more accurate measurement. This VDD voltage is used as reference voltage for the AD conversion.
  • Application Task - (code snippet) - Reads the averaged VOUT voltage calculated to Volts by performing a 30 conversions in one measurement cycle. The measured results will be showed on the uart terminal every 300 milliseconds. Note : The input voltage (VIN) range is from 4.2V to 60V. The output current (IOUT) value should not be greater than 1.5A.
void applicationTask()
{
    vout_value = buck11_get_averaged_vout( vout_resol, 30 );
    
    FloatToStr( vout_value, text );
    floatCut();
    
    mikrobus_logWrite( "** VOUT : ", _LOG_TEXT );
    mikrobus_logWrite( text, _LOG_TEXT );
    
    if (vout_resol == _BUCK11_VOUT_VOLTS)
    {
        mikrobus_logWrite( " V", _LOG_LINE );
    }
    else
    {
        mikrobus_logWrite( " mV", _LOG_LINE );
    }
    
    mikrobus_logWrite( "*************************************", _LOG_LINE );
    Delay_ms( 300 );
}

Additional Functions :

  • floatCut - Allows to real values be rounded on two decimal places.

Other mikroE Libraries used in the example:

  • I2C
  • UART
  • Conversions

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.

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