Linear Technology LTC4002ES8-4.2 Battery Charger IC

The LTC4002ES8-4.2 from Linear Technology is a highly efficient, standalone constant-current/constant-voltage charger for lithium-ion batteries. This compact, integrated circuit is specifically designed for charging single-cell lithium-ion batteries with a full-charge voltage of 4.2 volts. Its small form factor and feature-rich design make it an ideal solution for portable electronic devices where space is at a premium and battery life is of utmost importance.

This charger IC operates over a wide input voltage range and provides a high charging current capability, making it versatile for various applications. The LTC4002ES8-4.2 offers a programmable charge current up to 1A through a single external resistor, which allows designers to tailor the charging profile to the specific needs of their application and the battery being used.

One of the key features of the LTC4002ES8-4.2 is its automatic recharge feature. The device initiates a new charge cycle if the battery voltage falls below an internal threshold, ensuring that the battery remains fully charged over time. Additionally, it includes safety features such as automatic termination upon charge completion, thermal regulation to maximize the charge rate without risk of overheating, and a timer to terminate the charge cycle if the battery does not reach the final float voltage within a programmed time limit.

The LTC4002ES8-4.2 also provides status indication through its CHRG pin, which can be used to drive an LED indicator to signal whether the battery is charging or fully charged. For added flexibility, the IC includes a shutdown mode that reduces the supply current to 25uA, further conserving battery life when not in use.

Designed for a variety of applications, including handheld instruments, cellular telephones, digital cameras, and other Li-Ion battery-powered devices, the LTC4002ES8-4.2 offers a compact, reliable, and easy-to-implement solution for battery charging requirements. Its advanced features ensure safe and efficient charging, making it a smart choice for modern portable electronics.

Overall, the LTC4002ES8-4.2 is a testament to Linear Technology's commitment to providing innovative power management solutions that enhance the performance and convenience of battery-operated devices.