Here's some information about the TP4056 IC in the SOP-8 package:

Functionality: The TP4056 is designed for the charging of single-cell lithium-ion or lithium polymer batteries. It provides a constant current and constant voltage charging algorithm.

Package Type: The "SOP-8" designation indicates that the TP4056 is housed in a Small Outline Package with 8 pins.

Pin Configuration: The SOP-8 package has eight pins that serve various functions, including connections for input voltage, ground, battery terminals, and status indicators. The specific functions of each pin are outlined in the datasheet.

Charging Algorithm: The TP4056 typically follows a two-stage charging process. In the constant current (CC) phase, it provides a fixed charging current to the battery. In the constant voltage (CV) phase, it maintains a fixed voltage until the charging current drops below a certain threshold.

Charge Status Indication: The TP4056 often features indicators, such as an LED, to convey the charging status. The LED might change color or blink to signify different charging stages.