BQ26221PWG4

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The BQ26221PWG4 is a battery management solution from TI, targeted at IoT applications, such as wearables, medical, smart home, and industrial applications. It is a packaged, single-chip solution with integrated capability for advanced battery charging, fuel gauging, and protection. The device allows system designers greater flexibility to customize data path and charging schemes while minimizing the overall system complexity. Moreover, the device allows designers to develop a high level of confidence that their design is compliant with safety regulations.

The device integrates many of the components typically found in a battery management solution into a single, integrated device. It is primarily powered by an internal charge pump, allowing it to draw a very low power current from the battery cell and still provide enough power for the charging and energy measurement functionality. It can operate in three different modes depending on what is required for a particular system: standalone, master, and slave.

In the standalone mode, the device will manage the charge and discharge of the battery cell independent of any other system. It will monitor the voltage and temperature information with respect to current draw and charging rate and adjust accordingly. This mode is suitable for applications where the device can manage the battery all by itself and no other device or system is necessary.

In the master mode, the device will be in control of the charging and discharge of all the battery cells in the system. It will manage the overall battery charge and discharge to ensure that the system operates optimally. The device will also allow for greater flexibility in the design of the system, with the ability to distribute current across multiple cells. This is especially useful for applications that require a higher degree of accuracy and control, such as a medical system or an automotive system.

In the slave mode, the device will be subordinate to an external master. It will receive commands from the master and carry out the necessary actions. This is useful for applications where the system requires tighter integration between multiple battery cells, such as a high-end electric vehicle.

In terms of safety, the device provides several features that ensure the safety of the battery and the system. It can monitor the voltage, current, and temperature information with respect to the charging rate and will shut down the system if any parameter reaches a dangerous level. Furthermore, the device supports several safety protocols, such as JEITA, to ensure that the system is compliant with safety regulations.

Overall, the BQ26221PWG4 is a great solution for battery management applications. It provides a high level of integration, safety, and flexibility, making it an excellent choice for a variety of applications. Whether it is used as a standalone, master, or slave battery management solution, the BQ26221PWG4 has the features necessary to ensure that your system operates safely and effectively.

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