TP4054 Datasheet – Li-lon Battery Charger IC

This IC is Battery Charger.

Part Number : TP4054

Marking : 54b

Function : Linear Li-lon Battery Charger with Thermal Regulation in SOT

Package : SOT23-5 Type

Manufacturers : NanJing Top Power


TP4054 datasheet circuit

Description :

The TP4054 is a complete constant-current/constant-voltage linear charger for single cell lithium-ion batteries. Its SOT package and low external component count make the TP4054 ideally suited for portable applications. Furthermore, the TP4054 can work within USB and wall adapter. No external sense resistor is needed, and 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.


TP4054 pinout data


1. Programmable Charge Current Up to 800mA
2. No MOSFET, Sense Resistor or Blocking Diode Required
3. Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate Without Risk of Overheating
4. Charges Single Cell Li-Ion Batteries Directly from USB Port



1. Cellular Telephones, PDAs, MP3 Players
2. Charging Docks and Cradles
3. Blue tooth Applications

Other data sheets within the file : TP-4054


TP4054 Datasheet PDF

TP4054 pdf

CN3791 Datasheet – Li-ion Battery Charger IC

This is one of the Battery Charger IC types.

Part Number : CN3791

Function : 4A, Standalone Li-ion Battery Charger IC

Package : 10 Pin SSOP Type

Manufactures :

Images :

CN3791 datasheet controller

Description :

The CN3791 is a PWM switch-mode lithium ion battery charger controller that can be powered by
photovoltaic cell with maximum power point tracking function with few external components.


CN3791 pinout


1. Photovoltaic Cell Maximum Power Point Tracking
2. Wide Input Voltage: 4.5V to 28V
3. Complete Charge Controller for single cell Lithium-ion Battery
4. Charge Current Up to 4A
5. High PWM Switching Frequency : 300KHz


1. Power Bank
2. Hand-held Equipment
3. Battery-Backup Systems
4. Portable Industrial and Medical Equipment
5. Standalone Battery Chargers

CN3791 Datasheet