Description
Product Overview
The TP4056 1A Lipo Battery Charging Board is a complete, low-cost charging solution designed for single-cell lithium-ion and lithium-polymer (LiPo) batteries. Based on the industry-standard TP4056 chip from Top Power ASIC, this module provides a simple, safe, and efficient way to charge 3.7V rechargeable batteries using a standard Mini USB port or direct 5V power supply .
This compact module implements a Constant Current / Constant Voltage (CC/CV) charging algorithm, which is the correct method for safely charging lithium batteries. It automatically delivers the maximum preset current (1A by default) until the battery reaches 4.2V, then switches to constant voltage mode, gradually reducing the current until the battery is fully charged .
What makes this module particularly valuable for DIY projects is its simplicity: no external components are required, and the onboard LEDs provide clear visual feedback of the charging status. The red LED indicates charging is in progress, while the green LED lights up when the battery is fully charged .
Whether you are building portable electronics, powering an Arduino project with a battery backup, maintaining 18650 cells, or creating custom power banks, the TP4056 module offers a reliable, ready-to-use charging solution.
Key Features
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Built-in Protection Circuit: Many versions include DW01 battery protection IC and FS8205 dual MOSFETs, providing overcharge, over-discharge, overcurrent, and short-circuit protection .
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1A Maximum Charge Current: Default charge current of 1000mA (1A), fully adjustable by changing the programming resistor (RPROG) for lower current applications .
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CC/CV Charging Algorithm: Implements proper Constant Current / Constant Voltage charging method essential for lithium battery safety and longevity .
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Mini USB Input: Onboard Mini-USB connector for easy connection to any standard USB charger, power bank, or computer USB port .
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Dual-Color Status Indicator: Red LED indicates charging in progress; Green LED indicates fully charged or no battery connected .
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Automatic Power Path Management: Supports charging while simultaneously powering a load (output terminals remain active during charging) .
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Preset 4.2V Charge Voltage: ±1% accuracy ensures battery is charged to the correct full voltage without risk of overcharging .
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Automatic Recharge: When a fully charged battery drops below 4.05V (approximately 80-90% capacity), a new charging cycle automatically begins .
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Thermal Regulation: Automatically reduces charge current if internal die temperature exceeds safe limits, protecting the chip during high-current charging .
Technical Specifications
| Parameter | Operating Value |
|---|---|
| Input Voltage (VCC) | 4.5V – 5.5V DC (5V typical) |
| Full Charge Voltage | 4.2V ±1% |
| Maximum Charge Current | 1A (1000mA) default, adjustable by resistor change |
| Under-Voltage Lockout | 3.7V (charger stops below this voltage) |
| Over-Discharge Protection | 2.4V – 2.5V (output cutoff) |
| Over-Current Protection | 3A (typical) |
| Charging Accuracy | ±1.5% |
| Operating Temperature | -10°C to +85°C |
| Dimensions (approx.) | 22mm × 17mm (board only) |
| Connector Type | Mini-USB (input), 2.54mm pitch (B+/B- and OUT+/OUT-) |
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