Create a high-efficiency power manager with LTC3586 and ATmega328P
The future of battery management
Published Feb 14, 2024
Click board™
BATT-MAN Click
Dev. board
Arduino UNO Rev3
Compiler
NECTO Studio
MCU
ATmega328P
Manage power and charge LiPo batteries with multiple regulated outputs and built-in safety features
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Hardware Overview
How does it work?
BATT-MAN Click is based on the LTC3586, an integrated high-efficiency power manager from Analog Devices that features a versatile combination of switching regulators - boost, buck-boost, and dual buck converters - alongside an intelligent PowerPath™ controller with Bat-Track™ adaptive output control for optimized power flow and system stability. This board is a compact power management solution that combines advanced battery charging and multiple regulated power outputs on a single board. This Click board™ offers three independent regulated outputs. A low-current 3.3V LDO output supplies up to 30mA, ideal for light loads and always active by default. A high-current 3.3V output supports up to 1A, while an additional 5V output delivers up to 800mA, both suitable for more demanding applications. All outputs are conveniently accessible via onboard
screw terminals, ensuring a secure and flexible connection to external devices. BATT-MAN Click includes a full-featured LiPo battery charger with constant current/constant voltage control, automatic recharge, trickle charging for low-voltage cells, and safety features such as bad cell detection and timeout-based termination. The battery float voltage is fixed at 4.2V, matching the LiPo batteries available from the MIKROE shop. An onboard CHG status indicator provides real-time feedback on the charging process through a red LED, driven by an open-drain CHG pin that signals charging, standby, or battery fault conditions. Robust system monitoring is enhanced by the FLT pin, which detects output faults by monitoring the feedback voltages of the switching converters. In the event of a regulation failure, this bidirectional pin pulls LOW and disables all converters. It can
also be used externally to shut down the regulators manually. The device supports flexible startup and control. An onboard EN Vout switch (SW1) allows manual activation of outputs even without 5V mikroBUS™ power, as long as a LiPo battery is connected. Regulator enable lines are routed to the mikroBUS™ EN pin, allowing MCU-based control. In addition to screw terminals for power outputs, a standard 2.54mm battery connector is provided for seamless integration of a LiPo battery. This Click board™ can be operated only with a 5V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. It also comes equipped with a library containing functions and example code that can be used as a reference for further development.
Features overview
Development board
Arduino UNO is a versatile microcontroller board built around the ATmega328P chip. It offers extensive connectivity options for various projects, featuring 14 digital input/output pins, six of which are PWM-capable, along with six analog inputs. Its core components include a 16MHz ceramic resonator, a USB connection, a power jack, an
ICSP header, and a reset button, providing everything necessary to power and program the board. The Uno is ready to go, whether connected to a computer via USB or powered by an AC-to-DC adapter or battery. As the first USB Arduino board, it serves as the benchmark for the Arduino platform, with "Uno" symbolizing its status as the
first in a series. This name choice, meaning "one" in Italian, commemorates the launch of Arduino Software (IDE) 1.0. Initially introduced alongside version 1.0 of the Arduino Software (IDE), the Uno has since become the foundational model for subsequent Arduino releases, embodying the platform's evolution.
Microcontroller Overview
MCU Card / MCU
Architecture
AVR
MCU Memory (KB)
32
Silicon Vendor
Microchip
Pin count
28
RAM (Bytes)
2048
You complete me!
Accessories
Click Shield for Arduino UNO has two proprietary mikroBUS™ sockets, allowing all the Click board™ devices to be interfaced with the Arduino UNO board without effort. The Arduino Uno, a microcontroller board based on the ATmega328P, provides an affordable and flexible way for users to try out new concepts and build prototypes with the ATmega328P microcontroller from various combinations of performance, power consumption, and features. The Arduino Uno has 14 digital input/output pins (of which six can be used as PWM outputs), six analog inputs, a 16 MHz ceramic resonator (CSTCE16M0V53-R0), a USB connection, a power jack, an ICSP header, and reset button. Most of the ATmega328P microcontroller pins are brought to the IO pins on the left and right edge of the board, which are then connected to two existing mikroBUS™ sockets. This Click Shield also has several switches that perform functions such as selecting the logic levels of analog signals on mikroBUS™ sockets and selecting logic voltage levels of the mikroBUS™ sockets themselves. Besides, the user is offered the possibility of using any Click board™ with the help of existing bidirectional level-shifting voltage translators, regardless of whether the Click board™ operates at a 3.3V or 5V logic voltage level. Once you connect the Arduino UNO board with our Click Shield for Arduino UNO, you can access hundreds of Click boards™, working with 3.3V or 5V logic voltage levels.
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
Click board™ Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Arduino UNO Rev3 as your development board.
Track your results in real time
Application Output
1. Application Output - In Debug mode, the 'Application Output' window enables real-time data monitoring, offering direct insight into execution results. Ensure proper data display by configuring the environment correctly using the provided tutorial.
2. UART Terminal - Use the UART Terminal to monitor data transmission via a USB to UART converter, allowing direct communication between the Click board™ and your development system. Configure the baud rate and other serial settings according to your project's requirements to ensure proper functionality. For step-by-step setup instructions, refer to the provided tutorial.
3. Plot Output - The Plot feature offers a powerful way to visualize real-time sensor data, enabling trend analysis, debugging, and comparison of multiple data points. To set it up correctly, follow the provided tutorial, which includes a step-by-step example of using the Plot feature to display Click board™ readings. To use the Plot feature in your code, use the function: plot(*insert_graph_name*, variable_name);. This is a general format, and it is up to the user to replace 'insert_graph_name' with the actual graph name and 'variable_name' with the parameter to be displayed.
Software Support
Library Description
BATT-MAN Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.
Example Description
BATT-MAN Click is a very versatile battery operated power manager. When powered via mikroBUS, it will charge the connected Li-Ion/Li-Po 3.7V battery, while providing the output voltage on all its outputs at the same time.
Key functions:
battman_cfg_setup- Config Object Initialization function.battman_init- Initialization function.battman_set_enable- Controls the operation of the Click.battman_get_charging_indicator- Charging indicator status.
Application Init
Initializes the Click driver and logger utility and enables the Click board.
Application Task
Checks the charging indicator status, and in relation to its state it displays an appropriate message on USB UART.
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
* \brief BATT-MAN Click example
*
* # Description
* BATT-MAN Click is a very versatile battery operated power manager. When powered via mikroBUS,
* it will charge the connected Li-Ion/Li-Po 3.7V battery, while providing the output voltage
* on all its outputs at the same time.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes the Click driver and logger utility and enables the Click board.
*
* ## Application Task
* Checks the charging indicator status, and in relation to its state
* it displays an appropriate message on USB UART.
*
* \author MikroE Team
*
*/
// ------------------------------------------------------------------- INCLUDES
#include "board.h"
#include "log.h"
#include "battman.h"
// ------------------------------------------------------------------ VARIABLES
static battman_t battman;
static log_t logger;
static uint8_t chg_flag;
// ------------------------------------------------------ APPLICATION FUNCTIONS
void application_init ( void )
{
log_cfg_t log_cfg;
battman_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.
battman_cfg_setup( &cfg );
BATTMAN_MAP_MIKROBUS( cfg, MIKROBUS_1 );
battman_init( &battman, &cfg );
battman_set_enable( &battman, 1 );
log_printf( &logger, "BATT-MAN Click enabled.\r\n" );
chg_flag = 0;
}
void application_task ( void )
{
if ( !battman_get_charging_indicator ( &battman ) )
{
if ( chg_flag == 1 )
{
log_printf( &logger, "Charging enabled.\r\n" );
}
chg_flag = 0;
}
else
{
if ( chg_flag == 0 )
{
log_printf( &logger, "Charging disabled.\r\n" );
}
chg_flag = 1;
}
}
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
Category:Buck-Boost
