TP4056 1A Linear Li-Ion Battery Charger IC SOP-8

TP4056 1A Linear Li-Ion Battery Charger IC SOP-8 is a complete constant-current/constant-voltage linear charger specifically designed for single-cell lithium-ion batteries. It is suitable for USB and wall adapter power sources and comes with onboard current regulation, thermal regulation, and charge status indication.

Key Features:

• Single Cell Charging: Designed to charge 3.7V Li-Ion/Li-Po cells.
• 1A Charge Current: Supports adjustable charge current up to 1 Ampere.
• Complete Charger: Integrates all the functions required for battery charging.
• Thermal Regulation: Reduces charge current automatically if the IC temperature rises too high.
• Status Indication: LED indicators show charging and charge complete states.

Technical Specifications:

• Input Voltage: 4V to 8V
• Charging Voltage: 4.2V ±1%
• Charging Current: Adjustable up to 1000mA
• Battery Type: Single-cell Li-Ion or Li-Polymer
• Package Type: SOP-8 (ESOP-8 with thermal pad)
• Standby Current: Less than 2µA
• Precharge Condition: Trickle charge below 2.9V
• Termination Current: Typically 1/10th of programmed charge current

Mechanical Specifications:

• Package: SOP-8 with exposed pad
• Dimensions: Approx. 5mm × 4mm
• Mounting: Surface-mount device (SMD)
• Cooling: Exposed pad for thermal dissipation

Pinout and Wiring:

• VCC: Power input (typically from USB)
• BAT: Battery connection terminal
• CHRG: Charging status output (active low)
• STDBY: Charge complete status output (active low)
• PROG: Charge current programming via resistor
• GND: Ground

Datasheet and Documentation:

• Download TP4056 Datasheet (PDF)

Applications:

• Power Banks: Core component in DIY and commercial USB battery packs.
• Solar Charging Circuits: Used in solar-powered battery systems.
• Portable Devices: Suitable for MP3/MP4 players, cameras, and handheld electronics.
• Wearable Gadgets: Ensures safe and reliable charging in compact devices.
• DIY Electronics: Popular in maker projects involving Li-Ion battery charging.

Equivalent Models:

• TP5000: Supports LiFePO4 and solar charging
• MCP73831: Low-current Li-Ion charger IC with similar functions
• CN3065: Single-cell solar Li-Ion charger IC

Package Includes:

• 1 x TP4056 1A Linear Li-Ion Battery Charger IC SOP-8