The LTC1731EMS8-4.1#PBF is a sophisticated, standalone linear charger from Linear Technology designed to precisely charge single-cell lithium-ion batteries. This compact, high-performance component is encapsulated in an MSOP-8 package, offering a space-efficient solution for portable applications. The LTC1731EMS8-4.1#PBF is tailored to maintain the longevity and safety of batteries by employing a smart charging protocol that includes pre-conditioning, constant-current, and constant-voltage phases.

Key Features:

• Precision Charging: The charger is designed to charge a single lithium-ion cell with a final float voltage accuracy of ±1% at 4.1V, ensuring the battery is charged to its optimal voltage without overcharging.
• Programmable Charge Current: Users can set the charge current from 1mA to 1A via a single external resistor, providing flexibility for various battery capacities and thermal environments.
• Automatic Recharge: The LTC1731EMS8-4.1#PBF features an automatic recharge function, initiating a new charging cycle when the battery voltage falls below a preset threshold, keeping the battery topped up.
• Charge Status Output: It includes a charge status output that can be used to drive an LED or interface with a microcontroller, providing visual or digital feedback on the charging process.
• Thermal Regulation: To protect both the battery and the charger, the device incorporates thermal regulation, which automatically reduces charge current if the die temperature exceeds a preset threshold.
• No External Blocking Diode Required: The LTC1731EMS8-4.1#PBF has an internal MOSFET to prevent reverse battery discharge, eliminating the need for an external diode and saving board space.
• Low Dropout Voltage: The low dropout voltage of the charger allows it to operate effectively even with a low input voltage supply, making it suitable for use in USB-powered and portable devices.

Applications:

The LTC1731EMS8-4.1#PBF is ideal for a wide range of applications, including but not limited to:

• Portable Electronics
• Handheld Instruments
• Medical Devices
• Smartphones and Tablets
• Wireless Headsets
• Backup Power Supplies

With its advanced features and reliable performance, the LTC1731EMS8-4.1#PBF from Linear Technology is a superior choice for designers looking to incorporate a safe and efficient charging solution into their lithium-ion battery-powered applications.