TP5100 4.2v 8.4v lithium battery charge management compatible 2A charging board

Description

Product Overview

The TP5100 4.2V / 8.4V Lithium Battery Charge Management Board is a high-performance, switch-mode step-down charger for single-cell (4.2V) and dual-cell (8.4V) lithium batteries. Based on the TP5100 chip from Nanjing Top Power ASIC, this board is capable of delivering a maximum charging current of 2A, making it much faster than common TP4056 chargers .

Unlike simpler linear charger modules, the TP5100 uses a 400kHz switching regulator design . This switch-mode topology offers two major advantages: significantly less heat generation during fast 2A charging and support for a much higher input voltage range of 5V to 18V . The built-in power MOSFETs also remove the need for external Schottky diodes for reverse current protection .

The board integrates all necessary charging stages: trickle current pre-charge for deeply depleted batteries, constant current (CC) for rapid charging, and constant voltage (CV) for precise topping, ensuring battery longevity and safety . LED indicators provide clear status readout—red for charging, blue for full or no battery installed .

This module is widely used in high-capacity portable devices, power tools, and DIY battery pack (e.g., 2×18650) recharging projects where thermal efficiency and charging speed are critical. It also features full protection circuits to safeguard your batteries and the charger against overloads, shorts, and reverse connection .

Key Features

• Compatible with Two Battery Types: Jumper-selectable operation directly on the board. Supports Single Cell (4.2V) and Dual Cell (8.4V) Lithium Ion/Polymer battery packs .

• High Current & Switch-Mode Efficiency: Supports up to 2A charging current. The switch-mode regulator operates at 400kHz, delivering high current with minimum heat generation compared to linear chargers .

• Wide Input Voltage Range: Operates from 5V to 18V DC input, allowing it to be powered by standard USB chargers, 9V adapters, or 12V car power sources .

• Complete Protection Features: Equipped with input overcurrent, undervoltage lockout, chip over-temperature, short circuit, and critically, battery reverse polarity protection .

• Smart Charging Management: Implements the full 3-stage charging process: Trickle pre-charge, Constant Current (CC) fast charge, and Constant Voltage (CV) top-off .

• LED Status Indicators: Provides direct visual status with a Red LED (Charging) and a Blue LED (Charge Complete/Standby).

• Built-in Power MOSFETs: Integrates the necessary power switching hardware, keeping the board compact and component count low .

• Dual Output Ports: Features separate B+/B- pads for direct battery connection and OUT+/OUT- pads for load connection, giving flexible wiring options .

Technical Specifications