TC4054 is a constant current/constant voltage stand charger chip, mainly used for charging single-cell lithium batteries. No external sense resistor required, internal MOSFET

structure, so there is no need for an external reverse diode.

The TC4054 can regulate charge current to limit chip temperature at high power and high ambient temperatures. Its charging voltage is fixed at 4.2V, and the charging current can

It can be adjusted by an external resistor. When the float voltage is reached and the charging current drops to 1/10 of the set circuit, the TC4054 automatically terminates charging.

electrical process. When the input voltage is removed, the TC4054 automatically enters a low current mode, drawing less than 2uA from the battery. When TC4054 enters standby

In mode, the supply current is less than 25uA.

TC4054 can also monitor the charging current, has the characteristics of voltage detection, automatic cycle charging, and has an indicator pin to indicate the charging termination status.

status and input voltage status.