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Soldered CN3791 - MPPT solar Li-Ion charger board
ID: 1208296
zł53.71
Tax included
zł43.67 tax excl.
Solar Li-Ion battery charger board based on the CN3791 with maximum power point tracking (MPPT). It supports 6V, 9V, 12V and 18V solar panels, CC/CV charging up to 4.2V, spring terminals and a JST battery connector. Soldered 333136
Description
The device MPPT Li-Ion CN3791 Charger Board by Soldered is a solar charger module designed for charging single-cell Li-Ion batteries from photovoltaic panels. The board is based on the CN3791, a switching charger controller with MPPT functionality that adjusts the operating point of the solar panel to make efficient use of the available energy.
The battery is charged using a CC/CV profile, first with constant current and then with constant voltage. During the constant-voltage stage, the circuit maintains a final charging voltage of 4.2V with ±1% accuracy. The board is designed to work with solar panels rated at 6V, 9V, 12V or 18V. The appropriate range is selected using the SOLAR VOLTAGE pads on the PCB.
Convenient spring terminals are provided for connecting the solar panel, battery and powered circuit. The board also features a JST connector compatible with Soldered Li-Ion batteries. The battery acts as an energy storage device, allowing the connected project to remain powered even when the solar panel is not generating energy.
The module measures 54 × 38mm, features 3.2mm mounting holes suitable for M3 screws and 1.5mm header pin holes. The design is breadboard-compatible and uses LEGO-compatible mounting hole spacing. The hardware is open source, and the manufacturer provides schematic, KiCad, Gerber and 3D model files.
Features
- Battery charging
- Charger controller: CN3791
- Designed for single-cell Li-Ion batteries
- Charging method: CC/CV
- Final charging voltage: 4.2V
- Constant-voltage accuracy: ±1%
- Switch-mode charging controller
- MPPT and solar input
- Maximum power point tracking (MPPT)
- Supported solar panel voltages: 6V, 9V, 12V, 18V
- Solar panel voltage selection using SOLAR VOLTAGE pads
- MPPT pin voltage during regulation: 1.205V
- Connections
- Spring terminals for solar panel and battery connections
- JST connector for Li-Ion battery
- IN+ - positive solar panel input
- IN- - negative solar panel input
- OUT+ - positive battery output
- OUT- - negative battery output
- Output for powering the connected circuit from the battery
- Mechanical parameters
- Board dimensions: 54 × 38mm
- Mounting holes: 3.2mm, suitable for M3 screws
- Header pin holes: 1.5mm
- Breadboard-compatible design
- LEGO-compatible mounting hole spacing
- Additional information
- Open-source hardware design
- Schematic, KiCad, Gerber and 3D model files available
- Manufacturer: Soldered Electronics
- Product code: 333136
1208296
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