EMB1428QSQ/NOPB Integrated Circuits (ICs)

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Introduction to the Application Field and Working Principle of EMB1428QSQ/NOPB

The EMB1428QSQ/NOPB is a low-voltage protection IC designed to prevent potential damage caused by overvoltage in battery-operated devices. The device is designed to provide a complete, automated protection solution for various types of battery packs, making it a great choice for portable and mobile applications such as smartphones and tablets. This article is intended to provide a review of the application field and working principle of the EMB1428QSQ/NOPB.

Features and Benefits

The EMB1428QSQ/NOPB is a single-chip solution for low-voltage protection which features an integrated overvoltage protection of up to 6.5V. Its internal latch circuit protects the system from repeated overvoltage events, while the open drain output enables easy external circuit connection. The low-voltage protection IC also boasts a variety of other features and benefits. These include a maximum power supply voltage of 30V and a maximum voltage input range of 8V – 30V. The device is also built to be able to withstand up to 2% accuracy of high thermal drift at temperature variations from 0°C to 70°C. In addition, the device is equipped with a temperature-compensated overload protection function and a quiescent current of less than 6 μA.

Application Field and Working Principle

The EMB1428QSQ/NOPB is designed for use in battery-operated devices such as laptops, smartphones, tablets and other kinds of portable and mobile devices. As the device is equipped with an overvoltage protection of up to 6.5V, it can effectively protect a device against voltage surpassing that threshold. The device works in different stages: after a voltage exceeds the overvoltage threshold by 2V, the device will shut off the power supply and trigger a status pin (STB) to indicate a fault condition; once the voltage returns within the safe range, the device will allow the power supply to resume normal operations. It also features a latch-off circuit that can protect the system from unnecessary overvoltage events.

The main working principle lies in its protection circuit, which contains two comparators. When an input voltage exceeds the overvoltage threshold (6.5V in this device), the output of the comparator will be triggered, turning on the device, which will lead to the output of another comparator to be triggered, resulting in the shutdown of the power supply. The latch off circuit works in parallel with the protection circuit, so once the voltage surpasses the threshold and triggers the latch-off circuit, the power supply will remain shut off until the voltage falls below the threshold.

Conclusion

To conclude, the EMB1428QSQ/NOPB is a versatile low-voltage protection IC designed to protect battery-operated devices from potential damage caused by overvoltage. Its comprehensive protection solution and a comprehensive list of features, make it a great choice for portable and mobile applications. The device offers integrated overvoltage protection up to 6.5V and its latch-off circuit helps protect the system from repeated overvoltage events. As such, the device is well suited for a variety of applications that require reliable overvoltage protection.

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