BQ2000SN-B5

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The BQ2000SN-B5 is an integrated single cell Li-Ion/Li-polymer battery charger IC, consisting of a DC-DC converter, a voltage/current monitor and a charge control. It provides a wide variety of features such as active cell balancing, adjustable charge current, low power consumption and integrated safety protections, making it ideal for a vast range of applications.

Application Field

The BQ2000SN-B5 is ideal for lithium cell charging applications such as mobile phones, tablets, laptop computers, digital cameras, medical and industrial equipment, etc. It is also suitable for wearables, such as smart watches, fitness trackers, and portable medical devices that require long battery life. Additionally, the BQ2000SN-B5 can be used to quickly and safely charge other types of multi-cell lithium battery packs.

Working Principle

In the BQ2000SN-B5, charge current is used to maintain a constant level of charge by monitoring the voltage and/or temperature of the target lithium cell as it is being charged. When the target voltage or temperature is reached, the charge current is reduced, thus terminating the charge cycle. The BQ2000SN-B5 also features a range of safety precautions, such as detection of overheating, overvoltage and short circuits. Additionally, an integrated active-balancing feature is included, which allows for the equalization of charge levels between cells in a lithium battery pack.

Furthermore, the BQ2000SN-B5 supports low current charging, allowing for more efficient charging, and for extending the battery’s total life span. Charging can also be optimized for different battery discharge profiles (generic, deep discharge and pre-charge) as well as different temperatures, enabling a wide range of applications. Along with its additional protection features, the BQ2000SN-B5 provides an efficient and reliable charging experience.

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