The TP4056 with Protection is an upgraded charging module that combines the TP4056 linear charger with a dedicated battery protection IC (typically the DW01A) and a MOSFET switch. This version not only charges your single-cell lithium battery via Micro USB but also guards it against common electrical faults, making it a safe choice for DIY power banks and portable electronics.

Specifications

• Charging Method: Linear charging
• Charging Current: 1A (Adjustable by changing the R_PROG resistor)
• Charge Precision: 1.5%
• Input Voltage: 4.5V to 5.5V
• Full Charge Voltage: 4.2V
• Input Interface: Micro USB (and solder pads for direct 5V input)
• Operating Temperature: -10°C to +85°C
• Polarity Reversal: Not Allowed (Input or battery reversal will damage the chip)

Features

• Over-Discharge Protection: Automatically disconnects the load if the battery voltage drops below ~2.4V to prevent permanent battery damage.
• Over-Current/Short Circuit Protection: Cuts off the output if the load draws excessive current (typically above 3A) or if a short circuit is detected.
• Over-Charge Protection: Stops the charging process precisely at 4.2V to ensure the safety and longevity of the lithium cell.
• All-in-One Solution: Eliminates the need for a separate protection board on the battery, as the protection circuitry is integrated directly onto the PCB.
• Dual Status LEDs:
  • Red LED: Charging in progress.
  • Green/Blue LED: Charging complete.
• Independent Output Terminals: Features separate pads for the battery (B+ / B-) and the load (OUT+ / OUT-), allowing the protection IC to monitor the discharge path.
• Adjustable Charging Current: Comes pre-set to 1A but can be lowered for smaller batteries by swapping the R_PROG resistor.