BQ26221PWR Integrated Circuits (ICs)

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Battery management has been an essential part of power system design in the recent decade, especially with the development of high-density batteries used in mobile communication technology. Texas Instrument\'s BQ26221PWR is a Power Management Integrated Circuit (PMIC) specifically designed for battery management. The device provides a cost optimizing solution for battery-power devices in automotive and industrial applications.

The BQ26221PWR device has two main components: the fuel gauge and the charger. The fuel gauge monitors the SoC (state of charge) and the SoH (State of Health) of the battery by measuring individual cell voltages and temperatures. It then calculates the remaining battery capacity. The charger circuits provide safety protection functions, charge control, and charging current sources. Both the fuel gauge and charger can be activated or deactivated to achieve the desired power management.

The high-side Power FETs in the device provide up to 10 A of controlled current to prevent overcharging. The device monitors and maintains the charge current, voltage, and temperature during charging, while safety features include protection against overcharge and over-drain during discharge. The device is fully configurable, allowing the user to customize the operation of the device, such as charging current and voltage, cell temperatures, and battery capacity.

The BQ26221PWR contains a four-cell Coulomb counter which tracks the amount of current and voltage that flows in or out of the battery. This allows the device to accurately determine the SoC and SoH of the battery. In addition, the device can be used to set and monitor charging alarms and thresholds to ensure that the battery is always operating safely and optimally.

The BQ26221PWR is a highly cost-effective solution for battery-powered applications, especially for automotive and industrial vehicles. With the device\'s configurability, flexibility, and safety features, it is designed to meet the power requirements of a wide range of applications. However, it is important to note that the device is not suitable for use in high temperature environments, as it may be damaged by exposure to high temperatures.

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