TP4056 is a complete single-cell lithium-ion battery charger with constant current/voltage linear regulator. Its SOP8/MSOP8 package with a built-in heatsink and minimal external component count makes it an ideal choice for portable applications.

This charger is specifically designed to work with USB power and adapter power sources. It utilizes an internal PMOSFET architecture and a charge-reversal prevention circuit, eliminating the need for an external isolation diode. When the input voltage (AC adapter or USB power) is removed, TP4056 automatically enters a low-current mode, reducing battery leakage to less than 2uA.

Key Features:
Designed for single-cell lithium-ion batteries
SOP8/MSOP8 package with built-in heatsink for efficient heat dissipation
Minimal external component count for simplified circuit design
Compatible with USB power and adapter power sources
Internal PMOSFET architecture and charge-reversal prevention circuit
Automatically enters low-current mode when input voltage is removed
Ideal for portable applications

With its small size, efficient heat dissipation, and simplified circuit design, the TP4056 is a great solution for charging single-cell lithium-ion batteries in a wide range of applications.