TP4056 Battery Charging Protection Module (Type C)

Product Description The TP4056 Type-C Charging Module is a sophisticated linear charger for single-cell lithium-ion batteries, now upgraded with a modern Type-C USB interface. Unlike basic charging boards, this "protection" version includes a dedicated battery management circuit (DW01A and 8205A) that guards against over-charging, over-discharging, and over-current scenarios. This makes it an all-in-one solution for safely adding rechargeable power to DIY electronics, allowing you to charge the battery via USB and power your project simultaneously through the dedicated output pads.

Key Features

• Dual Protection Circuitry: Integrated DW01A IC protects the battery from discharging below 2.5V and prevents over-current surges above 3A.

• Modern Type-C Port: High-durability USB-C input compatible with contemporary smartphone chargers and power banks.

• Adjustable Charge Current: The default 1A charging rate can be modified by changing the RPROG resistor (R3) on the board.

• Simultaneous Charge/Discharge: Supports "load sharing," allowing the battery to power a circuit while it is being charged.

• Visual Status LEDs: Features a Red LED for "Charging" and a Blue/Green LED for "Full Charge" or "Standby" indication.

Technical Details

• Linear Charging Logic: Uses a constant-current/constant-voltage (CC/CV) charging profile optimized for 3.7V/4.2V lithium cells.

• Input Flexibility: In addition to the Type-C port, it features (+) and (-) solder pads for direct 5V DC input from solar panels or adapters.

• Soft-Start Function: Limits inrush current during the initial power-up phase to protect the internal MOSFETs.

• Automatic Recharge: Automatically restarts the charging cycle if the battery voltage drops below 4.05V after a full charge.

• Thermal Regulation: Internal feedback loops reduce the charge current if the die temperature rises above safe limits (approx. 140°C).

• High Precision: Maintains a steady 4.2V termination voltage with 1% accuracy to maximize battery health.

• Battery Chemistry: Designed specifically for 3.7V Lithium Polymer (LiPo) or 18650 Lithium-Ion cells.

• Reverse Polarity Warning: Does not have input reverse polarity protection; ensure VCC and GND are connected correctly to avoid burning the IC.

• Output Isolation: When the USB is unplugged, the protection IC ensures the battery is not drained back through the charging circuit.

• SMD Construction: Low-profile surface-mount components ensure the board remains under 4mm in height.

• Under-Voltage Lockout (UVLO): Prevents the circuit from operating if the input voltage is too low for stable charging.

• Trickle Charge Mode: If the battery voltage is below 2.9V, the IC delivers a low "trickle" current to safely revive the cell.

• PCB Quality: Built on a high-grade FR-4 substrate with thickened copper traces to handle 1A continuous current without overheating.

• Load Connections: Features dedicated OUT+ and OUT- pads, ensuring the load benefits from the discharge protection circuit.

• Breadboard Incompatible: Due to the side-mounted Type-C port and small size, it is best used with direct soldering or mounted on a carrier board.