1、 Product Description

TC4056A is a complete single lithium-ion battery with constant current/constant voltage linear charger. The ESOP8/DIP8 package with heat sink at the bottom and a small number of external components make TC4056A an ideal choice for portable applications. TC4056A can work with USB power supply and adapter power supply.

Due to the internal PMOSFET architecture and anti reverse charging circuit, no external isolation diode is required. Thermal feedback can automatically adjust the charging current to limit the chip temperature under high-power operation or high ambient temperature conditions. 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, TC4056A will automatically terminate the charging cycle.

When the input voltage (AC adapter or USB power supply) is removed, TC4056A automatically enters a low current state, reducing the battery leakage current to less than 2uA. The TC4056A can also be placed in the shutdown mode when there is power to reduce the power supply current to 55uA. Other features of TC4056A include battery temperature detection, undervoltage lockout, automatic recharging, and two LED status pins for indicating charging and ending.