Li-Ion TP5100 1S/2S 4.2V/8.4V up to 2A charger with protection

Li-Ion TP5100 1S/2S 4.2V/8.4V up to 2A charger with protection

The TP5100 lithium-ion (Li-Ion) cell charging module is a flexible solution for 1S or 2S systems, allowing configuration by soldering a jumper on the board. It supports charging at a maximum current of up to 2A and includes an LED that indicates correct operation. The jumper marked SET switches the module to two-cell charging mode, raising the charge voltage to 8.4V. This compact, economical module features protection against overheating, overcurrent, and undervoltage. It also provides an output for connecting an external status LED, making it ideal for small projects using one or two Li-Ion cells.

Key technical specifications

• Supports 1S and 2S Li-Ion cells (soldering the SET jumper switches the module to 2S mode)
• Input voltage: 5V - 15V
• Charging current: up to 2A
• Status indication: red LED (charging), blue LED (fully charged / no cell), no light (input voltage too low)
• Switching frequency: 400Hz
• Output reverse-polarity protection and output short-circuit protection
• Dimensions: 25mm x 17mm

Example applications

• Building custom power banks and portable power sources
• Powering autonomous electronics projects and robots
• Rebuilding battery packs in power tools
• Creating emergency power systems for small devices
• Building dedicated chargers for 1S and 2S Li-Ion packs

Benefits

• Versatility - easy switching between 1S and 2S operation with a single jumper
• Fast charging - high charging current up to 2A significantly shortens recharge time
• High safety - integrated protections safeguard the circuit and cells from damage
• Compact size - small footprint allows easy placement inside the target enclosure
• Easy diagnostics - clear LED indication and the option to route an external LED simplify monitoring