LTC1731EMS8-4.2#TRPBF - Linear Technology

The LTC1731EMS8-4.2#TRPBF is a standalone linear lithium-ion battery charger that simplifies the process of charging a single-cell lithium-ion battery. Manufactured by Linear Technology, now part of Analog Devices, this charger is designed for portability and reliability, making it an ideal choice for portable electronics where size and charging safety are of concern.

Key Features

• Precision Charging: The LTC1731EMS8-4.2#TRPBF offers precise end-of-charge control, ensuring the battery is charged to 4.2V with an accuracy of ±1%. This precision helps maximize the battery's lifespan and performance.
• Programmable Charge Current: Users can set the charge current from 150mA to 1A through a single external resistor, providing flexibility for different battery capacities and thermal environments.
• Automatic Recharge: The chip features an automatic recharge function, initiating a new charge cycle when the battery voltage falls below 4.05V, keeping the battery topped off.
• Charge Current Monitor: An onboard charge current monitor allows for real-time observation of the charging process, which can be used for charge termination or as a means to track charge progress.
• Multiple Safety Features: The charger includes safety features such as automatic shutdown upon battery removal, thermal regulation to prevent overheating, and a charge timer for added protection.
• Low Profile: Packaged in a low-profile (0.75mm) 8-lead MSOP, the LTC1731EMS8-4.2#TRPBF is designed for space-constrained applications.

Applications

This charger is suitable for a wide range of applications, including:

• Portable Computers
• Cellular Phones
• Handheld Instruments
• Charging Docks and Cradles
• Backup Power Supplies

Conclusion

The LTC1731EMS8-4.2#TRPBF from Linear Technology is a comprehensive charging solution for single-cell lithium-ion batteries, offering precision, flexibility, and safety. Its compact form factor and robust feature set make it an excellent choice for designers seeking to integrate a reliable charging system into their portable or space-sensitive applications.