BQ2002FPN Integrated Circuits (ICs)

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The BQ2002FPN is a novel power management integrated circuit (PMIC), specifically designed as a battery charger, primarily suited for use in embedded applications. The BQ2002FPN on-chip Charge Management Unit (CMU) provides a wide variety of features, including: charge current regulation, temperature regulation, safety timer implementation, overvoltage protection and safe discharge. This document provides a brief overview of the BQ2002FPN charge management unit, with an emphasis on the application field and working principle.

Application Field of BQ2002FPN:

The BQ2002FPN PMIC provides an ideal solution for embedded applications, such as portable and rechargeable devices, where charge management regulation is required. This is typically used in the automotive industry and in consumer electronics, where the device is used to charge and monitor the charge of a battery or battery pack.

The BQ2002FPN is designed for use in low voltage (1.6–3.6 V) and high current (up to 4 A) applications. It is suitable for battery varieties, including but not limited to Li-ion, Li-Poly, NiCd and NiMH.

The BQ2002FPN is available in a 3mm2 compact WLCSP package, making it suitable for use in space-constrained applications. The device is RoHS compliant, and contains a low EMI charge controller, making it ideal for use in connection with sensitive circuitry. The device is also qualified for automotive applications.

Working Principle of BQ2002FPN:

The BQ2002FPN utilizes a control feedback loop to regulate the charge current of the battery. The charge process is divided into two stages, the constant-voltage stage, and the constant-current stage. During the constant-voltage stage, the battery voltage is held at a constant level, while the current is regulated to decrease as the battery approaches full capacity. During the constant-current stage, the current is held at a constant level while the voltage is allowed to increase as the battery nears full capacity.

The BQ2002FPN provides a wide range of safety features, such as temperature regulation, safety timer implementation, overvoltage protection and safe discharge. A temperature sensing threshold can be set to prevent overheating. The safety timer will stop the charging process after a predetermined amount of time. The overvoltage protection protects the battery from being overcharged and the safe discharge feature prevents the battery from being discharged too quickly.

The BQ2002FPN can also be used in series or parallel connections, allowing multiple batteries to be charged simultaneously. It is also able to automatically balance the charge between the cells, ensuring that all cells are charged evenly. Additionally, the device includes enhanced features such as object-detection and reverse boost capabilities.

Conclusion:

The BQ2002FPN is a reliable and robust power management integrated circuit (PMIC) specifically designed as a battery charger. It provides a wide variety of features, including charge current regulation, temperature regulation, safety timer implementation, overvoltage protection and safe discharge. The BQ2002FPN is suitable for use in embedded applications, such as portable and rechargeable devices, as well as low voltage and high current applications. It is available in a 3mm2 compact WLCSP package and is RoHS compliant. The device is qualified for automotive applications and provides enhanced features such as object-detection and reverse boost capabilities.

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