The CN3761 Lithium Battery Charger Protection Board is a high-efficiency charging module designed for 4.2V lithium battery charging using a wide 5V–15V input range. It supports constant current and constant voltage charging modes, ensuring safe and stable charging performance. The module is especially suitable for solar-powered charging applications, offering intelligent MPPT-like behavior to optimize charging efficiency under varying sunlight conditions. Its built-in protection functions enhance battery safety during both charging and discharging.

Features:

1. Supports 4.2V lithium battery charging
2. Wide input voltage range: 5V–15V
3. Constant-current and constant-voltage charging control
4. Optimized for solar panel charging applications
5. Automatic adjustment for unstable solar input
6. Built-in overcharge protection and safe charging cutoff
7. High-efficiency charging performance with stable output
8. Suitable for DIY power banks, solar charging systems, and lithium battery projects

Specifications:

• Charging IC: CN3761
• Input Voltage: 5V–15V DC
• Output Voltage: 4.2V (lithium battery charge voltage)
• Charging Mode: CC/CV
• Charge Current: Adjustable (board-dependent)
• Battery Type Supported: Single-cell Li-ion / Li-Po
• Protection: Overcharge protection, temperature stability, input fluctuation compensation
• Module Type: Lithium battery solar charging module
• Operating Temperature: –20°C to +70°C

Package Includes:

1 × CN3761 Lithium Battery Charger Protection Board Module