The Texas Instruments LM3658SDX is a high-performance, dual-source USB/AC Li-Ion battery charger designed to meet the needs of modern portable electronics. This compact and efficient power management integrated circuit is capable of charging a single-cell lithium-ion battery with the flexibility of using either a USB port or AC adapter as the power source.

Key Features

• Dual Input Sources: The LM3658SDX accepts both USB and AC adapter inputs, automatically selecting the appropriate source without external user intervention.
• Intelligent Power Path Management: This charger seamlessly manages power distribution between charging the battery and powering the system load.
• Thermal Regulation: Ensures safe operation by reducing charge current if the die temperature exceeds a thermal threshold.
• Charge Status Indicators: Integrated LED drivers provide visual status for charging and termination, making it user-friendly and intuitive.
• High Efficiency: The device is optimized for minimal power loss, which results in less heat generation and more energy-efficient charging cycles.
• Programmable Charge Parameters: Offers flexibility with programmable charge current, precharge current, and termination threshold to accommodate various battery sizes and chemistries.

Applications

The LM3658SDX is suitable for a wide range of portable applications, including:

• Smartphones and Tablets
• Portable Media Players
• Handheld GPS Units
• Digital Cameras
• Bluetooth Headsets
• Other USB-powered devices

Technical Specifications

Conclusion

The LM3658SDX from Texas Instruments offers a versatile and reliable solution for charging lithium-ion batteries in a wide array of portable devices. Its dual-input source capability, combined with its comprehensive set of features, makes it an ideal choice for designers looking for a robust charging solution.