TP4057 SMD IC lithium ion battery charger 500mA SOT-23-6 UMW TP4057

Product Overview:

A surface-mount, stand-alone linear Li-Ion battery charger integrated circuit designed for portable electronic products, compatible with USB and adapter power sources, featuring constant current/constant voltage (CC/CV) charging architecture.

Core Specifications:

Manufacturer: TECH PUBLIC

Package Type: SOT23-6

Function: Single-cell Li-Ion Battery Charger

Charging Current: Up to 500mA (externally programmable)

Control Interface: Status Indication Pins (CHRG and STDBY)

Features:

• Constant current/constant voltage (CC/CV) operation

• Internal thermal regulation (automatically reduces current if chip temperature exceeds 135°C)

• No external MOSFET, sense resistor, or blocking diode required

• Undervoltage lockout protection

• Ultra-low power: <1µA leakage in sleep mode; 25µA in shutdown mode

• Two open-drain status outputs for real-time charge state indication

Applications:

• Portable consumer electronics

• USB-powered devices

• Handheld battery-operated equipment

• Single-cell Lithium battery power management systems