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TP4056 Battery Charging Protection Module (V8)

TP4056 Battery Charging Protection Module (V8)

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SpecificationDetails
Input InterfaceMicro USB / USB Type-C (Variant Dependent)
Charging MethodLinear Constant Current / Constant Voltage (CC/CV)
Input VoltageDC 4.5V – 5.5V
Full Charge Voltage4.2V (±1%)
Max Charge Current1A (Programmable)
Under-Voltage Cut-off2.5V
Over-Current Protection3A
Price
₹ 16.95 ₹ 16.95
(Tax included)

Product Description

The TP4056 Protection Module is a complete constant-current/constant-voltage linear charger for single-cell lithium-ion batteries. Its SOP-8 package and low external component count make it ideal for portable applications. Unlike basic TP4056 boards, this "Protection" version includes a secondary circuit that monitors the battery voltage. It automatically disconnects the load if the battery drops below $2.5V$ (preventing permanent cell damage) or if a short circuit occurs at the output. Dual onboard LEDs provide instant status: Red for "Charging" and Blue/Green for "Fully Charged."

Key Features

  • Integrated Protection: Built-in DW01A and 8205A ICs for over-discharge and over-current safety.

  • Adjustable Current: Default 1A charging rate can be modified by changing a single resistor.

  • USB-Powered: Can be powered directly from a phone charger or a computer USB port.

  • Soft-Start Function: Limits inrush current to protect the power source and the battery.

  • Independent Load/Battery Pads: Dedicated terminals for the battery (B+, B-) and the output load (OUT+, OUT-).

Technical Details

  • Charging Accuracy: High precision 1.5% accuracy.

  • Status LEDs: Two LEDs for visual monitoring.

  • Dimensions: 25mm x 19mm x 10mm.

Prototyping and Engineering Tips from Robogears

  • The "OUT" vs "B" Pads: Always connect your battery to the B+ and B- pads. Your project (the load) should be connected to the OUT+ and OUT- pads. This ensures the protection circuit can cut power to your project if the battery runs too low.

  • Heat Management: Since this is a linear charger, it dissipates excess voltage as heat. When charging at $1A$ from a $5V$ source, the chip can reach $60^{\circ}C$ to $70^{\circ}C$. If the board is inside a small enclosure, we recommend adding a tiny copper heatsink on top of the TP4056 IC.

  • Programing the Current: If you are charging a small battery (less than 1000mAh), you should lower the charging current. The current is set by the $R_{prog}$ resistor (usually $1.2k\Omega$ for $1A$). Replacing it with a $2.4k\Omega$ resistor will reduce the current to $500mA$, providing a safer charge for smaller cells.

  • Ammeter Connection: If you want to measure the charging current, connect your ammeter in series only with the $5V$ input, not between the module and the battery, to avoid interfering with the voltage sensing accuracy.

Package Includes

  • 1 x TP4056 Battery Charging & Protection Module

Disclaimer

Never reverse the polarity of the battery connection (B+/B-); doing so will instantly destroy the TP4056 IC. Ensure the input voltage does not exceed $5.5V$. Lithium batteries are energy-dense and should be handled with care; always use this module in a well-ventilated area.