BQ2085DBT-V1P3G4

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The BQ2085DBT-V1P3G4 is an integrated circuit that is part of the PMIC - Battery Management family. It is a single-cell lithium-ion/lithium-polymer (Li-Ion/Li-Pol) fuel gauge which provides predictive and robust power management, as well as cell protection features. It supports intelligent monitoring of a Li-Ion/Li-Pol battery pack through measurement of the cell’s SOC (state of charge) and SOH (state of health). SOC is determined through coulomb counting, and SOH is assessed via several unique cell monitoring and protection features that detect temperature, current, and voltage conditions. This device features an onboard 14-bit ADC (analog-to-digital converter) that delivers continuous monitoring of 16 parameters including cell voltage, current, and resistance. It also supports dynamic cell balancing to manage cell capacity imbalances in a pack battery. Moreover, the integrated microprocessor core provides system management, communication, and battery data storage.

The BQ2085DBT-V1P3G4 is very versatile in terms of application. It can be deployed for various battery management tasks such as powering and monitor a single Li-Ion/Li-Pol battery cell, monitoring a stack of multiple cells in a battery pack, balancing capacity imbalances between cells, conditioning cells, and protecting cells from damage due to overcharging, over-discharging, over-temperature, and short circuit.

In terms of operation, the BQ2085DBT-V1P3G4 is controlled by a 3.2V I2C or 4.40V SMBus interface to access cell voltage, current, and temperature measurements and to control cell balancing. When the preconditioning thresholds are met (voltage- and temperature-based), the device automatically applies current pulses to the cell and recaptures up to 97% of the energy from a deeply discharged cell. Once the cell is energized and the current drops, cell balancing is initiated to balance capacity imbalances between cells and to ensure that the battery pack behaves optimally.

Finally, the BQ2085DBT-V1P3G4 is equipped with a suite of integrated protection features which includes over-voltage protection, under-voltage protection, over-temperature protection, and cell imbalance protection. The device prevents cell damage due to overtemperature or overcharging, while enabling accurate State of Charge (SoC) readings. These features ensure that the device works reliably in a variety of harsh, high temperature, low voltage, and/or high current environments.

In summary, the BQ2085DBT-V1P3G4 is a robust, integrated circuit that serves as an effective battery management solution for various applications. It supports fast and accurate state of charge and health monitoring, as well as cell protection with integrated protection features. It has a versatile operation which allows it to be used in a variety of environments, from low voltage to high current. Moreover, it supports the dynamic balancing of a battery pack to balance capacity imbalances and support optimum performance. For these reasons, it is an ideal solution for battery management tasks.

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