Create a reliable and versatile power bank solution with MP2632B and STM32F031K6
Your portable power source
Published Oct 01, 2024
Click board™
PowerBank Click
Dev Board
Nucleo 32 with STM32F031K6 MCU
Compiler
NECTO Studio
MCU
STM32F031K6
Don't let a dead battery slow you down - choose our powerful and versatile power bank to keep your solution running smoothly no matter where you go
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Hardware Overview
How does it work?
PowerBank Click is based on the MP2632B, a highly integrated 3A Li-Ion and Li-Polymer battery charger from Monolithic Power Systems (MPS). It can supply power from the connected battery through a USB port and charge the battery. The MP2632B can operate in charge and boost modes to allow for full-system and battery-power management. It has an integrated VIN-to-SYS pass-through path to pass the input voltage to the system. The pass-through path has built-in over-voltage (OVP), over-current protection (OCP), and a higher priority over the charging path. This board can also recharge the connected battery from a micro USB connector on the bottom side by providing input power. The MP2632B operates in charge mode when the input power is present. The MP2632B detects the battery voltage automatically and charges the battery in three phases: trickle current, constant current, and constant voltage. Other features include charge termination and auto-recharge.
The MP2632B also integrates input current limit and voltage regulation to manage the input power and prioritize the system load. Without an input source, the MP2632B switches to boost mode through PB to power SYS from the battery. In boost mode, the OLIM pin programs the output current limit, and the MP2632B automatically turns off at light load. The MP2632B also allows output short-circuit protection (SCP) to disconnect the battery completely from the load in case of a short-circuit fault. Normal operation resumes once the short-circuit fault is removed. The operational mode selector button on the PowerBank Click has a few purposes. If the button is pressed for more than 1.5ms, the boost is enabled and latched if V IN is unavailable. LEDs 1-4 are ON for five seconds whenever the button is pressed for more than 1.5ms. If the button is pressed for more than 1.5ms twice within one second, it serves as a torch light ON/OFF switch. If the button is held pressed for more than 2.5 seconds, this is defined
as a long push, and the boost is shut down manually. A 4-LED driver is integrated for voltage-based fuel gauge indication. With torch-light control, the MP2632B provides an all-in-one solution for power banks and similar applications without an external microcontroller. The PowerBank Click is also equipped with an MCP3221, a successive approximation A/D converter (ADC) with a 12-bit resolution to monitor battery voltage over an I2C bus over a mikroBUS™ socket. This Click board™ can only be operated with a 5V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used as a reference for further development.
Features overview
Development board
Nucleo 32 with STM32F031K6 MCU board provides an affordable and flexible platform for experimenting with STM32 microcontrollers in 32-pin packages. Featuring Arduino™ Nano connectivity, it allows easy expansion with specialized shields, while being mbed-enabled for seamless integration with online resources. The
board includes an on-board ST-LINK/V2-1 debugger/programmer, supporting USB reenumeration with three interfaces: Virtual Com port, mass storage, and debug port. It offers a flexible power supply through either USB VBUS or an external source. Additionally, it includes three LEDs (LD1 for USB communication, LD2 for power,
and LD3 as a user LED) and a reset push button. The STM32 Nucleo-32 board is supported by various Integrated Development Environments (IDEs) such as IAR™, Keil®, and GCC-based IDEs like AC6 SW4STM32, making it a versatile tool for developers.
Microcontroller Overview
MCU Card / MCU
Architecture
ARM Cortex-M0
MCU Memory (KB)
32
Silicon Vendor
STMicroelectronics
Pin count
32
RAM (Bytes)
4096
You complete me!
Accessories
Click Shield for Nucleo-32 is the perfect way to expand your development board's functionalities with STM32 Nucleo-32 pinout. The Click Shield for Nucleo-32 provides two mikroBUS™ sockets to add any functionality from our ever-growing range of Click boards™. We are fully stocked with everything, from sensors and WiFi transceivers to motor control and audio amplifiers. The Click Shield for Nucleo-32 is compatible with the STM32 Nucleo-32 board, providing an affordable and flexible way for users to try out new ideas and quickly create prototypes with any STM32 microcontrollers, choosing from the various combinations of performance, power consumption, and features. The STM32 Nucleo-32 boards do not require any separate probe as they integrate the ST-LINK/V2-1 debugger/programmer and come with the STM32 comprehensive software HAL library and various packaged software examples. This development platform provides users with an effortless and common way to combine the STM32 Nucleo-32 footprint compatible board with their favorite Click boards™ in their upcoming projects.
Li-Polymer Battery is the ideal solution for devices that demand a dependable and long-lasting power supply while emphasizing mobility. Its compatibility with mikromedia boards ensures easy integration without additional modifications. With a voltage output of 3.7V, the battery meets the standard requirements of many electronic devices. Additionally, boasting a capacity of 2000mAh, it can store a substantial amount of energy, providing sustained power for extended periods. This feature minimizes the need for frequent recharging or replacement. Overall, the Li-Polymer Battery is a reliable and autonomous power source, ideally suited for devices requiring a stable and enduring energy solution. You can find a more extensive choice of Li-Polymer batteries in our offer.
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Nucleo 32 with STM32F031K6 MCU as your development board.
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 PowerBank Click driver.
Key functions:
uint16_t powerbank_read_data ( );- Function is used to read raw data from MCP3221.uint16_t powerbank_read_voltage ( uint16_t v_ref );- Function is used to calculate voltage of the connected battery.
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
* \brief PowerBank Click example
*
* # Description
* This application is example of the PowerBank Click functionality
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initalizes I2C driver and makes an initial log.
*
* ## Application Task
* This example shows the capabilities of the
* PowerBank click by measuring voltage of the connected
* battery. In order to get correct calculations user should
* change "v_ref" value to his own power supply voltage.
*
*
* \author MikroE Team
*
*/
// ------------------------------------------------------------------- INCLUDES
#include "board.h"
#include "log.h"
#include "powerbank.h"
// ------------------------------------------------------------------ VARIABLES
static powerbank_t powerbank;
static log_t logger;
void application_init ( void )
{
log_cfg_t log_cfg;
powerbank_cfg_t cfg;
/**
* 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.
powerbank_cfg_setup( &cfg );
POWERBANK_MAP_MIKROBUS( cfg, MIKROBUS_1 );
powerbank_init( &powerbank, &cfg );
Delay_ms( 100 );
log_printf( &logger, "------------------------\r\n" );
log_printf( &logger, " PowerBank click \r\n" );
log_printf( &logger, "------------------------\r\n" );
}
void application_task ( void )
{
uint16_t voltage;
uint16_t v_ref = 5075;
voltage = powerbank_read_voltage( &powerbank, v_ref );
log_printf( &logger, "Battery voltage: %d mV\r\n", voltage );
log_printf( &logger, "------------------------\r\n" );
Delay_ms( 2000 );
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
// ------------------------------------------------------------------------ END
