TP4056 is a high-performance single cell lithium-ion battery constant current/constant voltage linear charger. The TP4056 adopts the ESOP8 package with fewer peripheral components, making it very suitable for portable products and suitable for powering USB power supplies and adapter power supplies.
Based on the special internal MOSFET architecture and anti-reverse charging circuit, TP4056 does not require external detection resistors and isolation diodes. When the external ambient temperature is too high or in high-power applications, thermal feedback can adjust the charging current to reduce the chip temperature. The charging voltage is fixed at 4.2V, and the charging current can be set externally through a resistor. When the charging current drops to 1/10 of the set value after reaching the final floating charge voltage, the chip will terminate the charging cycle.
When the input voltage is disconnected, the TP4056 enters a sleep state and the battery leakage current drops below 1uA. The TP4056 can be set in shutdown mode, in which case the chip quiescent current drops to 35uA.
TP4056 also includes other features: battery temperature monitoring, undervoltage lockout, automatic recharge and two status pins to display charging and charge termination.
For complete product specifications, please refer to:

DataSheet