LTC1734ES6-4.2 - Linear Technology's Lithium-Ion Battery Charger IC

The LTC1734ES6-4.2 is a compact, high-efficiency, single-cell lithium-ion battery charger integrated circuit (IC) designed by Linear Technology. This sophisticated IC is specifically tailored for portable electronic devices that require a robust and reliable charging solution. It is housed in a small SOT-23 package, making it an ideal choice for space-constrained applications.

Key Features:

• Precision Charging: The LTC1734ES6-4.2 is engineered to deliver a precise end-of-charge voltage of 4.2V, ensuring the optimal performance and longevity of the lithium-ion battery.
• Programmable Charge Current: Users can set the charge current from 1mA to 300mA by selecting the appropriate external resistor, providing flexibility for various battery capacities and thermal environments.
• Low Dropout Voltage: The low dropout voltage of the device allows for efficient charging even when the input supply voltage is only slightly higher than the battery voltage.
• Automatic Recharge: The IC features an automatic recharge function that initiates a new charging cycle if the battery voltage falls below a preset threshold, ensuring the battery remains fully charged over time.
• Charge Status Output: A charge status output pin (CHRG) provides a simple interface to indicate the charging progress, which can be used to drive an LED indicator or interface with a microcontroller.
• Thermal Protection: The LTC1734ES6-4.2 incorporates thermal feedback to regulate the charge current and prevent overheating, enhancing the safety of the charging process.

Applications:

The LTC1734ES6-4.2 is versatile and can be used in a variety of applications, including:

• Handheld Instruments
• Bluetooth Headsets
• Portable Media Players
• Stand-Alone Chargers
• USB-Powered Gadgets

With its precision charging capabilities, customizable charge current, and compact form factor, the LTC1734ES6-4.2 from Linear Technology stands as a leading solution for lithium-ion battery charging in modern portable electronics.