MIKROE Charger 3 Click is a compact add-on board that represents a standalone battery charger with thermal regulation. This board features the TP4056, a complete constant-current/constant-voltage linear charger for single-cell lithium-ion batteries from NanJing Top Power ASIC Corp. The charge voltage of the TP4056 is specified at 4.2V with the charge current programmable via an onboard digital potentiometer, automatically terminating the charge cycle when the charging current drops to 1/10th the programmed value. It also features current monitoring, under-voltage lockout, automatic recharge, and two LEDs to indicate charge termination and the presence of an input voltage. This Click board™ is a perfect solution for the development of multiple Li-ion battery cell charging applications.
Charger 3 Click is based on the TP4056, a complete constant-current/constant-voltage linear charger for single-cell lithium-ion batteries from NanJing Top Power ASIC Corp. This standalone battery charger automatically terminates the charge cycle when the charge current drops to 1/10th of the programmed value after reaching the final float voltage. Thermal feedback regulates the charging current to limit the die temperature during high power operation or high ambient temperature. It also features current monitoring, under-voltage lockout, automatic recharge, and two LEDs to indicate charge termination and the presence of an input voltage.
The charge voltage of the TP4056 is specified at 4.2V with 1.5% accuracy, with the charge current pin programmable up to 1000mA via an onboard single-channel digital potentiometer, the AD5175 from Analog Devices, controllable through the I2C compatible digital interface. When the TP4056 is in a pre-charge mode, this pins voltage is regulated to 0.2V, while in constant-charge current mode voltage is regulated to 2V. During the charging process, the voltage on this pin can be used to measure the charge current.
Charger 3 Click has the possibility of connecting an external temperature sensor on the onboard header labeled as NTC. If the voltage of this pin is below 45% or above 80% of supply voltage for more than 0.15s, this means that the battery’s temperature is too high or too low, suspending the charging process. Alongside this feature, this Click board™ also has two LEDs to indicate charge termination and the presence of an input voltage, red LED labeled as CHG indicating charging process, and green LED labeled as STB for ‘charged’ status.
This Click board™ is designed to operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. It allows for both 3.3V and 5V capable MCUs to use the I2C communication lines properly. However, the Click board™ comes equipped with a library that contains functions and an example code that can be used, as a reference, for further development.
Features:
- Interface: I2C
- Compatibility: mikroBUS™
- Dimensions: 28.6 x 25.4mm
- Input Voltage: 3.3V or 5V
- Battery Charge Current Range: Min. 130mA, Max. 1000mA
- Operating Temperature Range: Min. -40°C, Typ. +25°C, Max. +85°C
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