The LTC4002ES8 is a robust and efficient standalone lithium-ion battery charger integrated circuit, expertly designed by Linear Technology for single-cell Li-Ion batteries. This compact, 8-lead SOIC device simplifies the charging process by incorporating features that ensure a safe and reliable charging cycle for portable electronic devices.

Key Features

• Charging Voltage: The LTC4002ES8 provides a precise float voltage of 4.2V, which is critical for the longevity and performance of Li-Ion batteries.
• Charge Current: It offers programmable charge current up to 2A, allowing users to tailor the charging speed to the needs of their specific application.
• Efficiency: With its high efficiency design, the LTC4002ES8 ensures minimal heat generation and optimal power conversion, which is essential for portable devices.
• No External MOSFET: The internal PowerPak MOSFET eliminates the need for an external component, simplifying the design and reducing the overall footprint.
• Automatic Recharge: The chip features an automatic recharge function, which initiates a new charging cycle when the battery voltage falls below a preset threshold, keeping the battery topped off.

Protection and Safety

• Charge Termination: The LTC4002ES8 incorporates a charge termination feature based on the charge current falling to 1/10th the programmed value, ensuring the battery is not overcharged.
• Safety Timer: A programmable safety timer provides an additional layer of protection by limiting the maximum charge time to prevent overcharging in case of an abnormal condition.
• Thermal Regulation: The device also includes thermal regulation to protect against overheating during the charging process.

Applications

The LTC4002ES8 is ideal for a variety of applications, including portable computers, handheld instruments, and battery backup systems. Its small size, high level of integration, and comprehensive set of features make it a go-to solution for designers looking to implement an effective Li-Ion battery charging system in their products.