BQ294702DSGR

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PMIC - Battery Management refers to the integrated application of power management and control circuits to ensure efficient use of battery with long battery life. The BQ294702DSGR is an example of such battery management system, using intelligent features and designing for safety.

Overview of BQ294702DSGR

The BQ294702DSGR is a SoC within TI\'s family of Battery Management & Protection ICs, that forms part of its FLEX Series. It is a single-chip solution with Lithium-Ion (Li-ion) fuel gauge, gas gauge and charger blockcell. This SoC provides a wide range of features to maximize efficient use of battery cell.

Design Features

The BQ294702DSGR contains a wide range of design features to ensure the battery cell is used efficiently and provide advances safety against overcharge, over discharge, over temperature and wrong voltage input.

• Low Voltage Protection (LVP): LVP prevents deep discharge of battery under low voltage conditions that may cause permanent damage or reduce the lifespan of battery.
• Temperature Protection: Temperature Protection prevents overcharging under high temperature conditions.
• Over Current Protection (OCP): OCP prevents higher than the normal current from passing through the battery, that may lead to permanent damage or reduce the lifespan.
• Wrong Voltage Input: This feature will protect the battery from wrong voltage input such as wrong type of AC supply.
• Balancing: Balancing ensures that the voltage of all cells in the battery pack are kept in balance, and maintain uniform usage of cell voltage.
• Charger: Charger provides fast and efficient charging of battery cell.
• Battery Gauge: Battery Gauge provides a reliable estimation of remaining charge of battery.

Applications of BQ294702DSGR

BQ294702DSGR is primarily targeted to be used in applications that require low and high voltage battery protection, such as Portable/High Mobility IOT applications, Portable E-Papers, Industrial/Medical applications and Smart Home Devices.

Working Principle of BQ294702DSGR

BQ294702DSGR works on the principle of monitoring, controlling and regulating the electrical characteristics of the battery. It establishes communication between the battery, fuel and gas gauge ICs, charger ICs and power management ICs of the system. It registers all incoming data from the components and responds accordingly.

BQ294702DSGR monitors the voltage and current to maintain a safe balance and exchanges data with the fuel gauge and charger ICs to ensure the most efficient charging and powering of devices and minimize any wastage. BQ294702DSGR also ensures safe operation with minimal distortion and low-energy losses by operating in low-power modes with several features for power savings during inactive cycles.

Conclusion

BQ294702DSGR is an important integrated device to ensure safe and efficient use of battery with long life span. It provides built-in low and high voltage protection, temperature protection, wrong voltage input protection and balancing capabilities. Further, the charger and battery gauge provide efficient charging and reliable estimation of remaining charge on the battery. With these features, it is suitable for safety critical applications such as Portable, IoT and Industrial/Medical applications.

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