BD4842FVE-TR Integrated Circuits (ICs)

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Integrated circuit technologies have been evolving over the past decades, and one of the most important components in any system is the Power Management Integrated Circuit (PMIC). Over the years, PMICs have become essential in modern electronics and have been used in a variety of applications including but not limited to networking, automotive, consumer, industrial, medical, and communication. The BD4842FVE-TR is a low supply voltage supervisory device in the form of an integrated circuit specifically designed for single cell, 3V lithium-ion battery powered applications. These supervisors help in providing the reset functions and protection for overvoltage and undervoltage conditions, making them highly desirable and popular among circuit designers.

BD4842FVE-TR Features

The BD4842FVE-TR has a wide operating voltage range of 1.8V to 5.5V. It also offers excellent accuracy of the reset voltage at around 0.2%. It has a very fast response time with low operating current of just 40nA, so it is suitable for even smallest applications and battery operated systems that require low power consumption. The supervisor includes an input to detect and monitor Vcc, a 2.1V-2.9V reference output, and RESET_N (active LOW) output. It also offers overvoltage detection with a programmable delay to prevent false RESET_N assertion. It also features a manual reset function for testing purposes.

Applications

The BD4842FVE-TR supervisors are mainly used in applications such as mobile phones, digital cameras, portable and handheld electronic devices. Its extended operating voltage range and low current consumption makes it ideal for these types of applications. It can also be used to monitor and protect single cell Li-ion battery powered systems and can be used for reset detection on power-up and power-down events.

Working Principle

The BD4842FVE-TR supervisors feature a voltage input and a voltage reference output. The voltage input is used to detect a voltage level, and once the voltage drops below a certain threshold level, it asserts a reset signal. The reference output allows for the setting of the reset threshold voltage. The reset signal can be used to reset the microcontroller or microprocessor, ensuring safe operations and prevents any unexpected activities.

In addition to the reset function, the BD4842FVE-TR also outputs an overvoltage detection signal when the input voltage exceeds the preset voltage. This signal can be used to shut down the system and, if necessary, set off alarms. This ensures the safety and reliability of the system by preventing any possible damage caused by higher voltage levels.

Conclusion

The BD4842FVE-TR is an excellent supervisor to be used in single cell lithium-ion powered applications. It provides excellent reset accuracy with very low power consumption and a wide operating voltage range. It also features an overvoltage detection signal to help protect the system from voltage fluctuations, allowing for safe and reliable operations.

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