CHARGER 13 CLICK
PID: MIKROE-3748
Weight: 20 g
Charger 13 Click is a single lithium-ion (Li+) cell battery charger. This click can be used for Low-Cost
Li-Ion battery chargers, or Power Tools, toys, backup energy storage solutions, etc. Charger 13 click
is based on the RT9532GQW battery charger IC, which has some extra features enabling charging
without too much hassle. This IC has an internal switching-mode regulation with input current
limiting, allowing it to use an external power supply from a cheap wall adapter, rated up to 28V. On
the board, there is a Power LED and two extra LED’s which can be used for charging indications.
Charger 13 click is supported by a mikroSDK compliant library, which includes functions that simplify
software development. This Click board™ comes as a fully tested product, ready to be used on a
system equipped with the mikroBUS™ socket.
Charging of the Li+ battery cell is a demanding task that requires a very accurate
current and voltage monitoring and limiting. In addition, it also requires specific charging
conditions, depending on the battery level (constant current mode, constant voltage
mode). Li+ batteries contain flammable chemical compounds and can easily be ignited.
The RT9532GQW IC closely monitors the battery voltage and current during the
charging process, ensuring safe and reliable operation. Charger 13 click is a perfect
solution for the development of multiple Li+ battery cell charging applications, offering a
set of connectors, pins, and LED indicators, allowing fast and easy prototyping.
HOW DOES IT WORK?
Charger 13 click is based on the RT9532GQW - fully integrated single cell Li-ion battery
charger IC ideal for portable applications. The RT9532 optimizes the charging task by
using a control algorithm including pre-charge mode, fast charge mode and constant
voltage mode. The input voltage range of the VIN pin can be as high as 28V. When the
input voltage exceeds the OVP threshold, it will turn off the charging MOSFET to avoid
overheating of the chip. Along with its small physical size, the low number of external
components makes this IC ideally suitable for various applications. The 4.2V factory
preset reference voltage simplifies design.
The RT9532GQW IC is designed with reliability in mind: the IC prevents draining the
battery below the critical level, offers prequel charging (for deeply depleted batteries),
features an overvoltage protection, charging status monitoring and so on. The Click
board™ itself is equipped with a set of indicators used to monitor both charging process
and power distribution.
CHARGE LED indicates the charge-in-progress status.
STATUS LED indicates power status during the charging process.
On the left side of the click board is an input screw terminal with corresponding
markings, where the external voltage as high as 28V can be applied. The connector on
the right side is reserved for a Li-Ion battery with GND and VBAT+ markings. When
connected to power source, the green STATUS LED will indicate it, while the red –
CHARGING LED will indicate the charging in progress and will turn off once the battery
charging is finished.
The voltage range which can be used to power up the Charger 13 click, allows for it to
work with both 3.3V and 5V capable MCUs. It can be selected by soldering a small
SMD jumper, labeled as VCC SEL to the correct position.
SPECIFICATIONS
Type
Battery charger
Applications
Charger 13 is a perfect choice for development lithium-ion (Li+)
cell battery charging applications.
On-board
modules
RT9532GQW, a highly Integrated, linear battery charger from
Richtek
Key Features
Intelligent, constant-current, constant voltage (CCCV),
temperature-regulated battery charger
Interface
GPIO
Click board size
M (42.9 x 25.4 mm)
Input Voltage
3.3V,5V
PINOUT DIAGRAM
This table shows how the pinout on Charger 13 click corresponds to the pinout of the
mikroBUS™ socket (the latter shown in the two middle columns).
Notes
Pin
Pin
Notes
NC
1
AN
PWM
16
EN
Enable In
NC
2
RST
INT
15
INT
Charging Interrupt Out
NC
3
CS
RX
14
NC
NC
4
SCK
TX
13
NC
NC
5
MISO
SCL
12
NC
NC
6
MOSI
SDA
11
NC
Power Supply
3.3V
7
3.3V
5V
10
5V
Ground
GND
8
GND
GND
9
GND
Power Supply
Ground
ONBOARD SETTINGS AND INDICATORS
Designator
Name
Default
Position
Default
Options
Description
JP1
VIN SEL
Left
5V
Power Supply Selection Jumper
INT/EXT, left position INT, right
position EXT
LD1
STATUS
-
-
Power Status LED indicator
LD2
CHARGING
-
-
Charging Status LED indicator
LD3
PWR
-
-
Power LED Indicator
SOFTWARE SUPPORT
We provide a library for the Charger 13 click on our LibStock page, as well as a demo
application (example), developed using MikroElektronika compilers. The demo can run
on all the main MikroElektronika development boards.
Library Description
The library covers all the necessary functions to control Charger 13 Click board. The
library contains a function which enables or disable charging and check battery charging
states.
Key functions:
void charger13_enable() - Enable the charging function.
void charger13_disable() - Disable the charging function.
uint8_t charger13_check() - Check battery charging function
Examples description
The application is composed of three sections :
System Initialization - Initializes GPIO and LOG structures, sets INT pin as input and PWM pin as
output and start to write log.
Application Initialization - Initialization driver enable's - GPIO, also write log.
Application Task - (code snippet) This is an example which demonstrates the use of Charger 13 click
board. This example shows the automatic control of the Charger 13 click, waits for valid user input
and executes functions based on a set of valid commands and check the battery charge status.
Results are being sent to the Usart Terminal where you can track their changes. All data logs on usb
uart for approximately every 1 sec when the data value changes.
Commands : 'E' - Enable charging; 'D' - Disable charging;
void applicationTask()
{
char receivedData;
if ( UART_Rdy_Ptr() )
{
receivedData = UART_Rd_Ptr();
switch ( receivedData )
{
case 'E' :
{
if ( enableFlag == 0 )
{
enableFlag = 1;
charger13_enable();
mikrobus_logWrite( "Charging Status : Enabled", _LOG_LINE );
mikrobus_logWrite( "‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐", _LOG_LINE );
}
break;
}
case 'D' :
{
if ( enableFlag == 1 )
{
enableFlag = 0;
charger13_disable();
mikrobus_logWrite( "Charging Status : Disable", _LOG_LINE );
mikrobus_logWrite( "‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐", _LOG_LINE );
}
break;
}
}
}
if ( charger13_check() != chargerFlag )
{
chargerFlag = charger13_check();
if ( chargerFlag == 0 )
{
mikrobus_logWrite( " Battery is charging ", _LOG_LINE );
mikrobus_logWrite( "‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐", _LOG_LINE );
}
else
{
mikrobus_logWrite( " Battery does not charge ", _LOG_LINE );
mikrobus_logWrite( "‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐", _LOG_LINE );
}
}
}
The full application code, and ready to use projects can be found on our LibStock page.
Other mikroE Libraries used in the example:
UART
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.
MIKROSDK
This Click board™ is supported with mikroSDK - MikroElektronika Software
Development Kit. To ensure proper operation of mikroSDK compliant Click board™
demo applications, mikroSDK should be downloaded from the LibStock and installed for
the compiler you are using.
For more information about mikroSDK, visit the official page.
https://www.mikroe.com/charger‐13‐click/10‐9‐19
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