TP4056 - Battery Charging/Protection Module (Micro USB)

TP4056 Battery Charging and Protection Module (Micro USB, 1A)

The TP4056 Battery Charging and Protection Module is a widely used, cost-effective, and reliable solution for charging single-cell 3.7V Lithium-Ion or Lithium-Polymer batteries, including popular 18650 cells. It is built around the proven TP4056 linear charger IC and, on protection-enabled variants, integrates the DW01A protection IC with FS8205A dual MOSFETs to ensure safe charging and discharging.

The module follows the industry-standard CC/CV (Constant Current / Constant Voltage) charging algorithm, terminating at a precise 4.2V float voltage. A default 1A charging current is provided, which can be adjusted by replacing the onboard programming resistor (RPROG) to suit smaller or larger battery capacities. Integrated protection circuitry safeguards the battery against over-discharge, over-charge, and over-current, extending battery lifespan and improving safety in portable electronics.

🔧 Key Features

• Charging IC: TP4056 linear lithium battery charger.
• Input Power: Micro-USB connector or IN+ / IN− pads (4.5V – 5.5V DC).
• Supported Battery: Single 3.7V Li-ion / Li-Po cell (4.2V full charge).
• Charging Current: 1A default, adjustable down to ~100mA via RPROG resistor.
• Charge Termination: Automatic C/10 termination with auto-recharge.
• Battery Protection (variant-dependent): Over-discharge (2.5V UVP), over-charge (4.2V OVP), and over-current protection (~3A).
• Status Indicators: Dual LEDs show charging and charge-complete states.

💡 Applications

• DIY 18650 power bank projects.
• Charging circuits for portable IoT devices and electronics.
• Battery management for small robotics and embedded systems.
• Backup power solutions using single-cell Li-ion batteries.

⚙️ Technical Specifications

📦 Package Includes

• 1 × TP4056 Battery Charging and Protection Module (Micro USB)