From handheld devices to renewable energy installations, this buck converter empowers modern engineering with its seamless voltage transformation, driving progress in various industries
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Hardware Overview
How does it work?
Buck 23 Click is based on the MAX20010C, a high-efficiency, synchronous step-down converter from Analog Devices, providing interface-configurable output voltage range from 0.5V to 1.58V. The MAX20010C offers a factory-preset output voltage of 1V and supports dynamic voltage adjustment with programmable slew rates. Other features include programmable soft-start, overcurrent, and overtemperature protections. The wide input/output voltage range, ±2% output voltage accuracy, and the ability to provide up to 6A load current make this Click board™ an ideal solution for on-board point-of-load and post-regulation applications. The MAX20010C features a synchronization input, marked as SYN and routed to the PWM pin of the mikroBUS™ socket, that
puts the converter either in skip mode or forced-PWM mode of operation. In PWM mode, the converter switches at a constant frequency with variable on-time. In skip mode, the converter’s switching frequency is load-dependent until the output load reaches a certain threshold. This Click board™ communicates with MCU using the standard I2C 2-Wire interface to read data and configure settings. Also, the MAX20010C allows choosing its I2C slave address using the SMD jumper labeled ADDR SEL. Besides, it also possesses a power-good function and a device-enable feature. The power-good feature is routed to the red LED marked as PGOOD and PG pin of the mikroBUS™ socket, indicating that the output reached regulation, while the EN pin serves
for power ON/OFF purposes optimizing power consumption (converter operation permission). This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. Additionally, there is a possibility for the MAX20010C power supply selection via jumper labeled as VDD SEL to supply the MAX20010C from an external power supply terminal in the range from 3V to 5.5V or with mikroBUS™ power rails. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development.
Features overview
Development board
Kinetis Clicker is a compact starter development board that brings the flexibility of add-on Click boards™ to your favorite microcontroller, making it a perfect starter kit for implementing your ideas. It comes with an onboard 32-bit ARM Cortex-M4 microcontroller, the MK22FN512VLH12 from NXP Semiconductor, a USB connector, LED indicators, buttons, a mikroProg connector, and a header for interfacing with external electronics. Thanks to its compact design with clear and easy-recognizable silkscreen markings, it provides a fluid and immersive working experience, allowing access
anywhere and under any circumstances. Each part of the Kinetis Clicker development kit contains the components necessary for the most efficient operation of the same board. In addition to the possibility of choosing the Kinetis Clicker programming method, using USB HID mikroBootloader, or through an external mikroProg connector for Kinetis programmer, the Clicker board also includes a clean and regulated power supply module for the development kit. The USB-MiniAB connection provides up to 500mA of current, which is more than enough to operate all
onboard and additional modules. All communication methods that mikroBUS™ itself supports are on this board, including the well-established mikroBUS™ socket, reset button, and several buttons and LED indicators. Kinetis Clicker is an integral part of the Mikroe ecosystem, allowing you to create a new application in minutes. Natively supported by Mikroe software tools, it covers many aspects of prototyping thanks to a considerable number of different Click boards™ (over a thousand boards), the number of which is growing every day.
Microcontroller Overview
MCU Card / MCU
Architecture
ARM Cortex-M4
MCU Memory (KB)
512
Silicon Vendor
NXP
Pin count
64
RAM (Bytes)
131072
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Schematic
Step by step
Project assembly
Track your results in real time
Application Output via Debug Mode
1. Once the code example is loaded, pressing the "DEBUG" button initiates the build process, programs it on the created setup, and enters Debug mode.
2. After the programming is completed, a header with buttons for various actions within the IDE becomes visible. Clicking the green "PLAY" button starts reading the results achieved with the Click board™. The achieved results are displayed in the Application Output tab.
Software Support
Library Description
This library contains API for Buck 23 Click driver.
Key functions:
buck23_set_vstep
- This function sets the voltage output step to 10mV or 12.5mVbuck23_set_vout
- This function sets the voltage outputbuck23_get_pg_pin
- This function returns the PG (power good) pin logic state
Open Source
Code example
This example can be found in NECTO Studio. Feel free to download the code, or you can copy the code below.
/*!
* @file main.c
* @brief Buck 23 Click example
*
* # Description
* This example demonstrates the use of Buck 23 click by changing the output voltage.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes the driver and performs the device default configuration.
*
* ## Application Task
* Changes the output voltage once per second and displays on the USB UART the currently set
* voltage output value as well as its range and resolution. It also checks and displays the status
* register content and the power good pin indication.
*
* @author Stefan Filipovic
*
*/
#include "board.h"
#include "log.h"
#include "buck23.h"
static buck23_t buck23;
static log_t logger;
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
buck23_cfg_t buck23_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.
buck23_cfg_setup( &buck23_cfg );
BUCK23_MAP_MIKROBUS( buck23_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == buck23_init( &buck23, &buck23_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( BUCK23_ERROR == buck23_default_cfg ( &buck23 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}
void application_task ( void )
{
uint16_t vout_mv;
uint8_t status;
if ( BUCK23_OK == buck23_set_vstep ( &buck23, BUCK23_VSTEP_10 ) )
{
log_printf ( &logger, " ------------------------------------\r\n" );
log_printf ( &logger, " VOUT resolution: 10mV\r\n VOUT range: 500mV to 1270mV\r\n" );
log_printf ( &logger, " ------------------------------------" );
}
for ( vout_mv = BUCK23_VOUT_MIN_VSTEP_10; vout_mv <= BUCK23_VOUT_MAX_VSTEP_10; vout_mv += 50 )
{
if ( BUCK23_OK == buck23_read_register ( &buck23, BUCK23_REG_STATUS, &status ) )
{
log_printf ( &logger, "\r\n STATUS: 0x%.2X\r\n", ( uint16_t ) status );
}
if ( BUCK23_OK == buck23_set_vout ( &buck23, vout_mv ) )
{
log_printf ( &logger, " VOUT: %u mV\r\n", vout_mv );
}
if ( !buck23_get_pg_pin ( &buck23 ) )
{
log_printf ( &logger, " ERROR: No power good\r\n" );
log_printf ( &logger, " Restarting device\r\n" );
buck23_restart_device ( &buck23 );
vout_mv -= 50;
}
Delay_ms ( 1000 );
}
if ( BUCK23_OK == buck23_set_vstep ( &buck23, BUCK23_VSTEP_12_5 ) )
{
log_printf ( &logger, " ------------------------------------\r\n" );
log_printf ( &logger, " VOUT resolution: 12.5mV\r\n VOUT range: 625mV to 1587.5mV\r\n" );
log_printf ( &logger, " ------------------------------------" );
}
for ( vout_mv = BUCK23_VOUT_MIN_VSTEP_12_5; vout_mv <= BUCK23_VOUT_MAX_VSTEP_12_5; vout_mv += 50 )
{
if ( BUCK23_OK == buck23_read_register ( &buck23, BUCK23_REG_STATUS, &status ) )
{
log_printf ( &logger, "\r\n STATUS: 0x%.2X\r\n", ( uint16_t ) status );
}
if ( BUCK23_OK == buck23_set_vout ( &buck23, vout_mv ) )
{
log_printf ( &logger, " VOUT: %u mV\r\n", vout_mv );
}
if ( !buck23_get_pg_pin ( &buck23 ) )
{
log_printf ( &logger, " ERROR: No power good\r\n" );
log_printf ( &logger, " Restarting device\r\n" );
buck23_restart_device ( &buck23 );
vout_mv -= 50;
}
Delay_ms ( 1000 );
}
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END