Lithium Battery Charging and Protection Integrated Board with 5V Input and 4.2V ±1% Cut-Off Voltage

This integrated board combines lithium battery charging and protection functions in a compact 2.6cm by 1.7cm design. It accepts 5V input voltage from standard USB power sources and provides precise charging control with a 4.2V ±1% cut-off voltage. The board delivers up to 1000mA charging current while offering 3A overcurrent protection and 2.5V over-discharge protection to maintain battery health and prevent damage from electrical faults.

Technical Specifications and Performance Features

The board incorporates multiple protection mechanisms and precise voltage regulation to ensure safe lithium battery operation. Its integrated design eliminates the need for separate charging and protection circuits, simplifying electronic project development while maintaining reliable performance across various applications.

Voltage Regulation Design

The charging circuit maintains a precise 4.2V ±1% cut-off voltage, which corresponds to the optimal charging limit for most lithium-ion batteries. This accuracy prevents overcharging that can reduce battery capacity over time. The 5V input voltage requirement makes the board compatible with common power sources including USB ports, wall adapters, and power banks without requiring additional voltage conversion.

Current Protection Performance

With a maximum charging current of 1000mA, the board can efficiently charge batteries of various capacities. The 3A overcurrent protection activates when current exceeds safe levels, such as during short circuits or when connected devices draw excessive power. This protection mechanism helps prevent damage to both the battery and connected components by interrupting current flow before temperatures rise to dangerous levels.

Circuit Construction Quality

Practical Applications and Usage Scenarios This integrated board serves multiple applications where lithium battery management is required, from hobbyist projects to prototype development. Its combination of charging and protection functions makes it suitable for various electronic devices that require portable power solutions with built-in safety features.

Electronic Project Development

Developers creating battery-powered prototypes can integrate this board to manage power requirements without designing separate charging and protection circuits. The 5V input compatibility allows testing with standard USB power during development phases. The 1000mA charging capacity supports batteries commonly used in portable electronics, while the protection features prevent damage during circuit debugging and component testing.

Everyday Device Integration

For devices requiring regular battery charging, the board provides reliable performance with minimal external components. The 4.2V ±1% charging accuracy ensures batteries reach full capacity consistently, while the protection mechanisms operate automatically without user intervention. During charging, the board manages current flow to prevent overheating, and the over-discharge protection helps extend battery life by preventing deep discharge cycles.

Educational and Hobbyist Use

Electronics students and hobbyists can use the board to learn about battery management principles while building functional projects. The visible components on the blue PCB allow observation of circuit layout and connection points. The specified voltage and current ratings provide concrete examples of electrical parameters in practical applications, with the protection features demonstrating important safety considerations in circuit design.

Benefits and Value Considerations

The integrated design offers multiple advantages over separate charging and protection components, particularly in space-constrained applications. By combining functions on a single board, it reduces component count and simplifies wiring while maintaining comprehensive battery protection features.

Space Efficiency Value

At 2.6cm by 1.7cm, the board occupies minimal space in electronic assemblies, making it suitable for compact devices where internal volume is limited. This integrated approach eliminates the need for separate charging ICs and protection circuits, potentially reducing overall project costs by decreasing component count and simplifying the bill of materials. The single-board solution also reduces assembly time compared to implementing separate functions with discrete components.

Reliability and Safety Satisfaction

Implementation Advantages</h3 The board's 5V input requirement aligns with widely available power sources, reducing the need for specialized power supplies during development and deployment. The specified electrical parameters provide clear guidelines for integration, with the 1000mA charging current supporting efficient power transfer for various battery sizes. By incorporating this pre-designed solution, developers can focus on other aspects of their projects while ensuring proper battery management through tested and specified performance characteristics.