BQ77910DBTR Integrated Circuits (ICs)

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Power Management Integrated Circuit (PMIC) plays an important role in modern electronic products, especially battery management. It\'s responsible for switching between different power sources to deliver reliable and stable voltage supply for automotive and consumer applications, as well as industrial applications such as machine learning and artificial intelligence. The BQ77910DBTR is a special battery management PMIC designed specifically for automotive and consumer applications. In this article, we\'ll go over the application field and working principle of the BQ77910DBTR.

Overview

The BQ77910DBTR is a single-stage, 18 V step-down DC/DC switching regulator with built-in battery management, power monitoring, system monitoring, and protection functions. It has a built-in adjustable linear regulator that can regulate 0.8V~3.3V voltage in 0.05V increments. With up to 30% efficiency, it\'s ideal for automotive, consumer, and industrial applications that require low-voltage and high-efficiency performance which need to run from a single 18V power source.

Applications:

The BQ77910DBTR is capable of powering a variety of automotive and consumer applications, such as infotainment systems, instrumentation clusters, LCD displays, and Bluetooth/Wi-Fi connectivity. It\'s also ideal for a variety of industrial applications, such as machine learning, artificial intelligence, and the Internet of Things (IoT). In addition, the BQ77910DBTR can also be used in embedded systems, automotive manufacturing, and automotive aftermarket applications.

Working Principle

The BQ77910DBTR uses a three-stage control architecture that includes an active loop and two control loops. The active loop uses a pulse width modulation (PWM) signal to regulate the output voltage through cycle-by-cycle control. The two control loops are for overcurrent protection and under voltage lockout (UVLO).

The active loop operates in a "bang-bang" mode, which allows the BQ77910DBTR to regulate the output voltage to a specified level. It works by modulating the PWM signal in response to the input and output voltages. When the input voltage is above the output voltage, the PWM signal is increased to boost the output voltage. When the input voltage is below the output voltage, the PWM signal is reduced to attenuate the output voltage.

The two control loops are responsible for protecting the BQ77910DBTR from overcurrent and under voltage conditions. The overcurrent protection feature limits the output current to prevent damage caused by overcurrent events. The under voltage lockout (UVLO) feature triggers when the input voltage drops below a certain voltage level, in order to protect the BQ77910DBTR from being damaged due to extreme power fluctuations.

Conclusion

The BQ77910DBTR is a PMIC specifically designed for automotive and consumer applications. Its three-stage control architecture, along with its built-in protection features, make it ideal for a variety of applications that require low-voltage and high-efficiency performance. Its built-in adjustable linear regulator also allows users to accurately regulate the output voltage to meet the specific requirements of their application. With these features, the BQ77910DBTR is an ideal choice for automotive and consumer applications that need reliable and efficient voltage regulation.

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