MCP73213 click

How does it work?

MCP73213 Click is based on the MCP73213, a dual-cell Li-Ion/Li-Polymer battery charge management controller with input overvoltage protection from Microchip. The charger integrates input overvoltage protection, pass transistor, current sense, and reverse discharge protection. It operates at constant current/constant voltage with thermal regulation. Four battery voltage charge options exist 8.2V, 8.4V, 8.7V, and 8.8V, with a resistance programmable fast charge current from 130mA up to 1100mA. Automatic recharge at 95% and preconditioning of deeply depleted cells at 10% are factory-set.

You can set the charging current over the MCP4161, a single SPI digital potentiometer with non-volatile memory from Microchip. It is a 10K, 8-bit device with 256 resistors and 257 wiper steps. The integrated EEPROM can store resistance data for the wiper position. The charge current limit is based on the die temperature during high-power or high-ambient conditions. The external power supply in a recommended range of battery voltage charge options (+0.3V) up to 13V can be connected to the VIN terminal. The batteries can be connected to the VOUT terminal.

MCP73213 uses a standard 3-Wire SPI serial interface of the MCP4161 to communicate with the host MCU supporting modes 0.0 and 1.1 and frequency of up to 10MHz. The status output of the battery charger is available over the STAT LED.

This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the 3V3 5V jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. 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.

Specifications

Pinout diagram

This table shows how the pinout on MCP73213 click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
	NC	1	AN	PWM	16	NC
	NC	2	RST	INT	15	NC
SPI Chip Select	CS	3	CS	RX	14	NC
SPI Clock	SCK	4	SCK	TX	13	NC
	NC	5	MISO	SCL	12	NC
SPI Data IN	SDI	6	MOSI	SDA	11	NC
Power Supply	3.3V	7	3.3V	5V	10	5V	Power Supply
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

MCP73213 Click electrical specifications

Software Support

We provide a library for the MCP73213 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for MCP73213 Click driver.

Key functions

• Set values for output current function

• Get the status register data function

• Convert ADC value to volatage

Example Description

This application is polymer battery charge management controller.

 void application_task ( void ) 
 { 
     log_printf( &logger, "---------------------- rn" ); 
     log_printf( &logger, "   10 kOhm - 130 mA    rn" ); 
     mcp73213_set_current_output( &mcp73213, MCP73213_OUTPUT_130_mA ); 
     Delay_ms ( 1000 );
     Delay_ms ( 1000 );
     Delay_ms ( 1000 );
     Delay_ms ( 1000 );
     Delay_ms ( 1000 ); 

     log_printf( &logger, "---------------------- rn" ); 
     log_printf( &logger, "    5 kOhm - 250 mA    rn" ); 
     mcp73213_set_current_output( &mcp73213, MCP73213_OUTPUT_250_mA ); 
     Delay_ms ( 1000 );
     Delay_ms ( 1000 );
     Delay_ms ( 1000 );
     Delay_ms ( 1000 );
     Delay_ms ( 1000 ); 
 }

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.Mcp73213

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. UART terminal is available in all MIKROE compilers.

mikroSDK

This Click board™ is supported with mikroSDK – MIKROE 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.