The MAX1554ETA from Maxim Integrated is a highly efficient, single-cell, lithium-ion (Li+) battery charger designed to operate with USB and AC adapter power supplies. It is a versatile charging solution tailored for portable devices such as smartphones, tablets, cameras, and other USB-powered electronics.

Key Features

• Charge Current Regulation: The MAX1554ETA can regulate charge currents up to 700mA from a USB supply and up to 4A from an AC adapter, making it a flexible option for various battery capacities.
• High-Efficiency Charging: With an integrated pass element and current-sense circuit, the device ensures efficient charging while minimizing heat generation.
• Thermal Regulation: The charger features thermal regulation to optimize the charge rate for the given temperature conditions, preventing overheating and ensuring safe operation.
• Automatic Power-Source Detection: The device automatically detects whether it is connected to a USB or an AC adapter power source and adjusts the charging parameters accordingly.
• Charge Status Indicators: It includes a charge status output that can drive an LED to provide visual feedback on the charging process.
• Small Form Factor: The MAX1554ETA comes in a tiny 8-pin TDFN package, ideal for space-constrained applications.

Applications

The versatility and compact size of the MAX1554ETA make it an excellent choice for a wide range of portable applications. It is commonly used in:

• Handheld Devices
• Bluetooth Headsets
• Portable Media Players
• Digital Cameras
• Other USB-Powered Gadgets

Technical Specifications

With an input voltage range of 4.25V to 6.5V, the MAX1554ETA can handle most USB and AC adapter power supplies. Its precision input current limit allows it to easily work with the USB specification's current limits. The device also features a preconditioning charge mode for deeply discharged batteries, and an end-of-charge control based on minimum current, ensuring a full charge every time.

Conclusion

The MAX1554ETA from Maxim Integrated is a robust and efficient solution for charging single-cell Li+ batteries. Its small footprint, combined with a feature set designed for safety and convenience, makes it an ideal choice for designers looking to integrate a reliable charging system into their portable devices.