Beginner
10 min

Convert and regulate voltage levels with TPS55289 and PIC32MZ2048EFH100

Synchronous buck-boost converter optimized for USB power delivery (USB PD) application

Buck-Boost 4 Click with Flip&Click PIC32MZ

Published Feb 06, 2024

Click board™

Buck-Boost 4 Click

Dev. board

Flip&Click PIC32MZ

Compiler

NECTO Studio

MCU

PIC32MZ2048EFH100

Take in one voltage and convert it to a higher or lower voltage as needed, making it useful for various applications that require different power levels

A

A

Hardware Overview

How does it work?

Buck-Boost 4 Click is based on the TPS55289, a buck-boost converter from Texas Instruments. It can smoothly transition between buck mode, buck-boost mode, and boost mode according to the input voltage and the set output voltage. It operates in buck mode when the input voltage exceeds the output voltage and in boost mode when the input voltage is less than the input voltage. When the input voltage is close to the output voltage, it

alternates between one-cycle buck mode and one-cycle boost mode. The converter can work in PWM or PFM mode, depending on the load currents. The switching frequency is set with a resistor to a little less than 1MHz. Buck-Boost 4 Click uses a standard 2-wire I2C interface to communicate with the host MCU supporting clock frequency of up to 1MHz. The I2C address can be selected over the ADDR SEL jumper. You can turn off the device by

setting the EN pin to a LOW logic state. The fault indication is available over the INT pin. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used for further development.

Buck-Boost 4 Click hardware overview image

Features overview

Development board

Flip&Click PIC32MZ is a compact development board designed as a complete solution 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 PIC32MZ microcontroller, the PIC32MZ2048EFH100 from Microchip, four mikroBUS™ sockets for Click board™ connectivity, two USB connectors, LED indicators, buttons, debugger/programmer connectors, and two headers compatible with Arduino-UNO pinout. Thanks to innovative manufacturing technology,

it allows you to build gadgets with unique functionalities and features quickly. Each part of the Flip&Click PIC32MZ development kit contains the components necessary for the most efficient operation of the same board. In addition, there is the possibility of choosing the Flip&Click PIC32MZ programming method, using the chipKIT bootloader (Arduino-style development environment) or our USB HID bootloader using mikroC, mikroBasic, and mikroPascal for PIC32. This kit includes a clean and regulated power supply block through the USB Type-C (USB-C) connector. All communication

methods that mikroBUS™ itself supports are on this board, including the well-established mikroBUS™ socket, user-configurable buttons, and LED indicators. Flip&Click PIC32MZ development kit allows 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.

Flip&Click PIC32MZ double image

Microcontroller Overview

MCU Card / MCU

default

Architecture

PIC32

MCU Memory (KB)

2048

Silicon Vendor

Microchip

Pin count

100

RAM (Bytes)

524288

Used MCU Pins

mikroBUS™ mapper

NC
NC
AN
NC
NC
RST
ID COMM
RA0
CS
NC
NC
SCK
NC
NC
MISO
NC
NC
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
Device Enable
RC14
PWM
Interrupt
RD9
INT
NC
NC
TX
NC
NC
RX
I2C Clock
RA2
SCL
I2C Data
RA3
SDA
Power Supply
5V
5V
Ground
GND
GND
1

Take a closer look

Click board™ Schematic

Buck-Boost 4 Click Schematic schematic

Step by step

Project assembly

Flip&Click PIC32MZ front image hardware assembly

Start by selecting your development board and Click board™. Begin with the Flip&Click PIC32MZ as your development board.

Flip&Click PIC32MZ front image hardware assembly
GNSS2 Click front image hardware assembly
Prog-cut hardware assembly
GNSS2 Click complete accessories setup image hardware assembly
Board mapper by product7 hardware assembly
Necto image step 2 hardware assembly
Necto image step 3 hardware assembly
Necto image step 4 hardware assembly
Necto image step 5 hardware assembly
Necto image step 6 hardware assembly
Flip&Click PIC32MZ MCU step hardware assembly
Necto No Display image step 8 hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Debug Image Necto Step hardware assembly

Software Support

Library Description

This library contains API for Buck-Boost 4 Click driver.

Key functions:

  • buckboost4_set_vout - Buck-Boost 4 set the output voltage function

  • buckboost4_set_vref - Buck-Boost 4 set internal reference voltage function

  • buckboost4_fault_indicator - Buck-Boost 4 check fault indicator function

Open Source

Code example

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

/*!
 * @file main.c
 * @brief Buck-Boost 4 Click example
 *
 * # Description
 * This example demonstrates the use of the Buck-Boost 4 Click board™.
 * This driver provides functions for device configurations and for the output voltage setting.
 *
 * 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.
 *
 * ## Application Task
 * The demo application sets the desired output voltage 
 * by cycling through a couple of voltage values.
 * Results are sent to the UART Terminal, where you can track their changes.
 *
 * @author Nenad Filipovic
 *
 */

#include "board.h"
#include "log.h"
#include "buckboost4.h"

static buckboost4_t buckboost4;
static log_t logger;

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    buckboost4_cfg_t buckboost4_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.
    buckboost4_cfg_setup( &buckboost4_cfg );
    BUCKBOOST4_MAP_MIKROBUS( buckboost4_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == buckboost4_init( &buckboost4, &buckboost4_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( BUCKBOOST4_ERROR == buckboost4_default_cfg ( &buckboost4 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
    log_printf( &logger, "____________\r\n" );
    Delay_ms ( 100 );
}

void application_task ( void ) 
{
    for ( uint8_t vout = 1; vout < 21; vout++ )
    {
        if ( BUCKBOOST4_OK == buckboost4_set_vout( &buckboost4, ( float ) vout ) )
        {
            log_printf( &logger, " Vout: %dV\r\n", ( uint16_t ) vout );
            Delay_ms ( 1000 );
            Delay_ms ( 1000 );
            Delay_ms ( 1000 );
            Delay_ms ( 1000 );
            Delay_ms ( 1000 );
        }
    }
    log_printf( &logger, "____________\r\n" );
    Delay_ms ( 1000 );
}

int main ( void ) 
{
    /* Do not remove this line or clock might not be set correctly. */
    #ifdef PREINIT_SUPPORTED
    preinit();
    #endif
    
    application_init( );
    
    for ( ; ; ) 
    {
        application_task( );
    }

    return 0;
}

// ------------------------------------------------------------------------ END

Additional Support

Resources

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