LTC4121IUD-4.2

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The LTC4121IUD-4.2 is a member of the PMIC - Battery Chargers family. This chip is a highly flexible multi-chemistry, current-mode controlled charger that operates in systems that use lithium-ion, nickel-metal-hydride, or lead-acid batteries. It is designed for use in single-order, dual-order, three-order and forced constant-current/constant-voltage applications. It is also capable of charging Li-ion cells from USB power sources.

LTC4121IUD-4.2 provides system designers with the power conversion and charging capabilities they need to meet their system requirements. It combines a wide operating temperature range and input voltage range with a high efficiency buck topology for battery charging applications. Furthermore, the chip can also be used in a variety of non-battery applications, such as DC-DC converters and mobile device battery backup.

One of the key features of the LTC4121IUD-4.2 is its adjustable current limit, which can be configured to provide up to 10A of charging current. This feature enables the chip to quickly charge large capacity Li-ion batteries. Furthermore, the chip also provides several safety mechanisms such as overtemperature, overtemperature shutdown and high-voltage fault protection.

The LTC4121IUD-4.2 is designed to operate with high efficiency at a wide range of input voltages and has a wide operating temperature range of -40° C to 85° C, making it suitable for use in a wide variety of applications in industrial, commercial and consumer applications.

The LTC4121IUD-4.2 uses a buck switching converter to convert the input voltage into the charging current, while the constant-current/constant-voltage control circuit controls the charge current and voltage. The chip also has two external current sense ports, which can be used to accurately control the current charging rate and ensure the battery is not overcharged. Additionally, the chip can be programmed to provide up to eight different charge profiles, which can be used in a variety of applications. Finally, the chip also has an integrated FET, which can be used to control the battery charging/discharging process.

Overall, the LTC4121IUD-4.2 is an ideal solution for charging Li-ion, NiMH, and lead-acid batteries. Its wide input voltage and operating temperature range, current limiting and safety mechanisms, and adjustable charge profiles make it an ideal choice for applications ranging from consumer battery chargers to industrial Li-ion battery-packs.

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