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TECH PUBLIC TP4057 product image
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TECH PUBLIC TP4057RoHS

Manufacturer
TECH PUBLICAsian Brands
MPN
TP4057
LCSC Part #
C5380673
Packaging
SOT-23-6
Customer #
Key Attributes
Linear lithium-ion battery charger
Datasheetpdf iconTECH PUBLIC TP4057
In-Stock: 8,930
8,930 In stock, ships now
Minimum: 10Multiple: 10Sales Unit: Piece
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QtyUnit PriceTotal Amount
10+$ 0.0414$ 0.41
100+$ 0.0363$ 3.63
300+$ 0.0337$ 10.11
3,000+$ 0.0318$ 95.40
6,000+$ 0.0303$ 181.80
9,000+$ 0.0295$ 265.50
Standard Packaging3000/Full Reel
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Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/Battery Management
ManufacturerTECH PUBLIC
PackagingSOT-23-6
Operating Temperature-40℃~+85℃
Interface-
Quiescent Current25uA
0V Battery ChargeNot supported
Type of BatteryLithium Battery
Operating Voltage4V~6.5V
FeaturesConstant current charging;Constant voltage charging;Trickle charging;Automatic recharge;Charge termination;Programmable charging current;Under-voltage lockout;Soft-start
The Chip TypeCharging IC
Balance Current-
Charge Current - Max500mA
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Introduction

AI Translation

The TP4057 is a high-performance single-cell lithium-ion battery constant-current/constant-voltage linear charger. Packaged in SOT23-6 with minimal external components, it is suitable for portable products and ideal for powering USB and adapter power supplies.

Based on a specialized internal MOSFET architecture and reverse-charge protection circuit, no external sense resistors or isolation diodes are required. When the ambient temperature is too high or in high-power applications, thermal feedback adjusts the charging current to reduce the chip temperature. The charge voltage is fixed at 4.24V, while the charge current can be set externally via a single resistor. When the charge current drops to 1/10 of the programmed value after reaching the final float voltage, the chip terminates the charge cycle.

When the input voltage is disconnected, the TP4057 enters sleep mode, reducing the battery leakage current to below 1uA. The TP4057 can be placed in shutdown mode, in which the quiescent current drops to 25uA.

Additional features include: undervoltage lockout, automatic recharge, and two status pins to indicate charging and charge termination.

Features

AI Translation
  • Programmable charge current up to 500mA
  • No external MOSFET, sense resistor, or isolation diode required
  • Complete linear charger for single-cell Li-Ion in SOT23-6 package
  • Constant current/constant voltage operation with thermal regulation for maximum charge rate without risk of overheating
  • 4.24V preset charge voltage with ±1% accuracy
  • Charge current monitor output for battery fuel gauging
  • Automatic recharge
  • Dual charge status outputs with battery absent and fault status indication
  • C/10 charge termination
  • 25uA quiescent current in standby mode
  • 2.9V trickle charge
  • Soft-start to limit inrush current
  • Reverse battery protection
  • Battery undervoltage protection to enable charging

Applications

AI Translation
  • Mobile phones
  • PDAMP3
  • MP4 players
  • Chargers
  • Digital cameras
  • Electronic dictionaries
  • Bluetooth
  • GPS navigation devices
  • Portable devices