Product description
Battery charger module for a single Li-Ion or LiPo cell. The charger features integrated protection and adjustable charge current. The board is intended for charging 3.6–3.7 V cells and offers flexible configuration, with solder jumpers allowing the charge current to be adjusted between 0.2 A and 2 A. The module uses a high-efficiency switching circuit, BQ25302 from Texas Instruments. The charger includes a power-path function that enables simultaneous operation of a connected load while the battery is charging.
Charging is performed via USB-C or external supply, and the battery is connected via a JST-PH connector or solder pads. A separate output is available to power electronics, with automatic switching between battery operation and external supply. Status is indicated by an LED showing charging, fully charged, or fault. Connections for batteries with NTC are provided, and the board uses standard 2.54 mm pitch for easy integration into prototypes and embedded systems.
Specifications:
- Battery type: Li-Ion or LiPo 3.6–3.7 V
- Charge voltage: 4.2 V
- Charge current: 0.2 A to 2.0 A (adjustable via solder jumpers)
- Supply voltage: 4.1 V to 6.2 V or via USB-C
Protection features: Temperature, under- and overvoltage, overcharge - Output: Load output with automatic switching (up to approx. 2 A)
- Efficiency: 94 %
- Switching frequency: 1.2 MHz
- Battery connection: JST-PH and solder pads
- NTC connection for temperature: Yes
- Pitch: 2.54 mm on connections
- Dimensions: 35 x 20 mm
- Mounting holes: 4 x 2.54 mm, c-c 30 x 15 mm
