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TP4057 Lithium-Ion Battery Charger IC -1

TP4057 Lithium-Ion Battery Charger IC -2

TP4057 Lithium-Ion Battery Charger IC -3

TP4057 Lithium-Ion Battery Charger IC – SOT23-6, Compact, Low Power, Overcharge Protection

Available:Out of Stock

Product SKU: INTEG347

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₹ 6 ~~₹ 9~~

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Specification

Description

TP4057 Lithium-Ion Battery Charger IC – SOT23-6, Compact, Low Power, Overcharge Protection

The TP4057 is a complete single-cell Li-Ion battery charger with battery positive and negative reverse polarity protection with constant current/constant voltage linear control. Its SOT26 package and fewer external components make the TP4057 ideal for portable applications. The TP4057 is suitable for USB power and adapter power supplies. Due to the internal PMOSFET architecture and anti-reverse charging path, no external sense resistors and isolation diodes are required. The full voltage is fixed at 4.2V, and the charging current can be externally set by a resistor. current drops to the set value of 1/10, and the TP4057 will automatically terminate charging.

Technical Details

Model: TP4057
Package Type: SOT23-6
Battery Type: Single-cell 3.7V Li-ion/Li-Po
Input Voltage Range: 4V to 8V (USB compatible)
Charge Voltage: 4.24V ±1%
Programmable Charge Current: Up to 500mA
Charging Method: Trickle → Constant Current → Constant Voltage
Trickle Charge Threshold: 2.9V
Charge Termination: C/10
Standby Quiescent Current: 25μA
Recharge Threshold Voltage: ~4.1V
Status Outputs: Dual LED indication for charge, fault, or no battery
Soft-start: Yes, limits inrush current
Reverse Polarity Protection: Yes
Thermal Regulation: Built-in

Features

Programmable charging current up to 500mA
No need for external MOSFET, sense resistor, or isolation diode
Complete linear charger in compact SOT23-6 package
Constant current / constant voltage operation with thermal regulation
4.24V pre-charge voltage with ±1% accuracy
Charge current monitor output for battery power detection
Automatic recharge when battery voltage drops
Dual status outputs for charging, no battery, and fault indication
C/10 charge termination for safe full charging
Low 25μA quiescent current in standby mode
2.9V trickle charging for deeply discharged batteries
Soft-start function to limit inrush current
Reverse polarity protection for battery connection

Applications

USB Li-ion Battery Chargers: Enable direct charging of single-cell batteries from USB ports without the need for external protection circuitry.

18650 and Single-Cell Battery Packs: Ideal for charging standard 3.7V Li-ion cells like 18650, commonly used in flashlights, vapes, and battery banks.

Wearable Electronics: Compact SOT23-6 package makes it suitable for space-constrained wearable designs such as fitness trackers and smart bands.

Portable Gadgets and Tools: Used in handheld devices like electric screwdrivers, remote controls, or toys requiring safe and efficient charging circuits.