TP4056 Battery Charger
TP 4056 chip is a lithium Ion battery charger for a single cell battery. It protects the cell from over-under charging. Two status LEDs; charging in progress and charging complete. It also has a programmable charge current of up to 1 A.
No blocking diode is required due to the internal PMOSFET architecture. Thermal feedback to regulate the charge current during high power and temperature.
Features of TP4056 Battery Charger includes;
- Programmable Charge Current of Up to 1000 mA
- No MOSFET, Sense Resistor or Blocking Diode Required
- Complete Linear Charger in SOP-8 for Single Cell Lithium Ion Batteries
- Constant Current / Constant-Voltage
- Charges Single Cell Li-Ion Batteries Directly from USB Port
- Preset 4.2 V Charge Voltage with 1.5 % accuracy
- Two Charge Status Output Pins
- C / 10 Charge Termination
- 2.9 V Trickle Charge Threshold (TP4056)
- Cellular Telephones,
- Charging Docks and Cradles
- Digital Still Cameras,
- Portable Devices
- USB Bus-Powered Chargers
- The power source needs to be able to provide at least 1A for the charger to correctly charge a connected battery. Most modern phone/USB chargers can provide 1A or more; refer to the label on your phone charger to verify. If you use a USB cable, make sure that it is made to carry at least 1A.
- Includes two indicator LEDs. Red LED indicates charging. Blue LED indicates charge complete.
- The charge current can be configured externally with the Rprog resistor (R3, see below diagram). The datasheet for the TP4056 includes a table and equation for what resistor values to use for configuring different charge currents.
- The module uses a very small amount of current (in the micro amps) whenever it is connected to a battery. It is fine to leave it connected to a battery for long periods, but if you plan to not charge the battery within four months then we recommend disconnecting the module from the battery.
- You can connect two lithium battery cells in parallel to form an equivalent single cell battery with a total capacity of twice that of the individual single cells, but we do not recommend connecting more than two cells at a time to this module.