Description
The MCP73831T-2ACI/OT is a highly integrated, linear battery charge management controller designed for space-limited applications using single-cell Li-ion or Li-polymer battery chemistries. This advanced IC simplifies the design of charging circuits by combining the power MOSFET, current-sensing resistor, and control logic into a single, compact device. It features a factory-preset 4.2V regulation voltage and supports up to 500mA of charging current, making it an excellent choice for portable electronic devices.
Equipped with highly sophisticated charging algorithms, the MCP73831 handles the complete charge cycle automatically—including pre-conditioning, constant-current (CC) fast-charge, and constant-voltage (CV) regulation. It also includes comprehensive safety features such as thermal regulation, which adjusts the charge current based on the chip’s internal temperature to prevent overheating. Housed in a tiny SOT-23 (SMD-5) package, it provides the ideal balance of performance, safety, and footprint for modern battery-powered hardware.
Key Features
- Complete Charge Management: Automatically executes pre-charge, fast-charge, and termination phases for maximum battery longevity.
- Preset 4.2V Regulation: Factory-calibrated for standard single-cell Li-ion/Li-polymer chemistry.
- 500mA Charge Current: Offers significant power for fast charging of small to medium-capacity lithium cells.
- Thermal Regulation: Dynamically limits charge current if the die temperature exceeds a safe threshold, ensuring operational safety.
- Space-Saving SOT-23 (SMD-5) Package: An industry-leading, tiny footprint that is perfect for compact, high-density portable electronics.
Application
- Wearable Technology: Perfect for smartwatches, fitness trackers, and other compact health-monitoring devices.
- Bluetooth Peripherals: An essential component for charging the lithium cells found in wireless earbuds, speakers, and peripherals.
- Handheld Medical Devices: Reliable charge management for essential portable diagnostic and monitoring equipment.
- Portable Consumer Gadgets: Ideal for compact electronics such as digital cameras, pocket sensors, and handheld game consoles.
- DIY Embedded Projects: A foundational building block for hobbyists and engineers creating custom rechargeable battery circuits.
Package Includes
- 1 x MCP73831T-2ACI/OT 4.2V 500mA Li-Ion/Li-Polymer Charger IC (SMD-5)
Technical Specifications
| Parameter | Specification |
|---|---|
| Device | MCP73831T-2ACI/OT |
| Battery Type | Single-cell Li-Ion / Li-Polymer |
| Regulation Voltage | 4.2V (Preset) |
| Max Charge Current | 500mA |
| Package Type | SMD-5 (SOT-23) |
| Shipping Weight | 0.001 kg |
| Shipping Dimensions | 4 × 4 × 1 cm |
Note: Product images are shown for illustrative purposes only and may differ from the actual product. For complete technical parameters, please refer to the official device datasheet.
