Based on the CN3065 charging IC, this compact module is designed to charge a single‑cell Li‑ion/LiPo battery from solar panels or USB sources. It automatically adjusts charging current based on available input power — ideal for energy-harvesting and low-power solar projects.
Electrical Specifications
Parameter | Specification |
|---|---|
| Input Voltage Range | 4.4 – 6 V DC (e.g., 5 V USB or 6 V solar panel) |
| Maximum Charge Current | 500 mA (auto-adjust based on input) |
| Charge Regulation Voltage | 4.2 V ±1 % (preset for Li‑ion) |
| Pre‑charge/Trickle Mode | Supported for deeply discharged cells |
| Sleep Mode Current Draw | < 3 μA when input removed |
| Protection Features | Short‑circuit, under-voltage lockout, auto-recharge |
Interface & Indicators
- Connectors: Standard 2‑pin JST or PH2.0 for solar panel and battery input/output
- Optional micro-USB input for charging via USB power
-
LED status indicators:
- Red = Charging
- Green = Charge complete
Mechanical Details
- Board dimensions: ~40 × 20 × 9 mm
- Weight: ~5 g
Key Features Summary
- Compact solar charger for single-cell Li‑ion/LiPo
- Up to 500 mA programmable charging current
- Preset Li‑ion charge voltage of 4.2 V ±1 %
- Auto-adjusts charging current based on input capability
- Sleep mode (< 3 μA draw) when no input power
- Pre-charge mode for deeply discharged batteries
- Over-current/short-circuit protection and auto-recharge
- LED status indicators and USB-compatible interface
Typical Use Cases
- Solar-powered battery packs and garden/pond lighting
- Remote sensors or IoT devices using solar energy
- Small portable chargers or emergency battery top-up units
- Ideal for prototyping solar harvesters or energy-efficient gadgets
Summary Table
Feature | Specification |
|---|---|
| Input Voltage | 4.4 ~ 6 V (solar panel or USB) |
| Max Charge Current | 500 mA |
| Charge Voltage | 4.2 V ±1 % |
| Trickle Mode | Enabled for < 2.8 V batteries |
| Sleep Mode Draw | < 3 μA |
| Protection | Short-circuit, UVLO, auto-recharge |
| Operating Temp | –40 °C to +85 °C |
| Connectors | 2‑pin JST/PH, optional micro-USB |
| Status LEDs | Red (charging), Green (done) |
| Dimensions | 40 × 20 × 9 mm |
| Weight | ~5 g |
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