1. DESCRIPTION

The TP4056 is a complete constant-current/constant-voltage linear charger for single cell

lithium-ion batteries. Its SOP package and low external component count make the TP4056

ideally suited for portable applications. Furthermore, the TP4056 can work within USB and wall

adapter.

No blocking diode is required due to the internal PMOSFET architecture and have prevent to

negative Charge Current Circuit. Thermal feedback regulates the charge current to limit the die

temperature during high power operation or high ambient temperature. The charge voltage is

fixed at 4.2V, and the charge current can be programmed externally with a single resistor. The

TP4056 automatically terminates the charge cycle when the charge current drops to 1/10th the

programmed value after the final float voltage is reached.

TP4056 Other features include current monitor, under voltage lockout, automatic recharge and

two status pin to indicate charge termination and the presence of an input voltage.

2. FEATURES

· Programmable Charge Current Up to

1000mA

·No MOSFET, Sense Resistor or Blocking

Diode Required

· Complete Linear Charger in SOP-8

Package for Single Cell Lithium-Ion

Batteries

·Constant-Current/Constant-Voltage

·Charges Single Cell Li-Ion Batteries Directly from USB Port

·Preset 4.2V Charge Voltage with 1.5 Accuracy

·Automatic Recharge

·two Charge Status Output Pins

·C/10 Charge Termination

·2.9V Trickle Charge Threshold (TP4056)

·Soft-Start Limits Inrush Current

·Available Radiator in 8-Lead SOP Package,

the Radiator need connect GND or impending