BU4231FVE-TR Integrated Circuits (ICs)

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PMIC (Power Management Integrated Circuit) is an integral part of many electronic products. Supervisors, as a particular type of PMICs, play an important role in protecting electronic systems from the over-voltage, under-voltage, clock fail or other situations that can lead to system failure. A typical supervisor used in many embedded systems is BU4231FVE-TR. This paragraph covers the application field and working principle of BU4231FVE-TR.

BU4231FVE-TR is a supervisor IC from RENESAS (former NEC Electronics Corporation). It is designed to monitor a single power supply and protect embedded system from over-voltage, under-voltage, clock fail or other situations. Its monitoring voltage range is from 1.62V to 5.5V and it can be configured to detect over-voltage, under-voltage, clock fail and other conditions. What differentiate it from traditional power supervisors is that BU4231FVE-TR is built on CMOS process and can be used with many MCUs and ASICs.

BU4231FVE-TR can be used in many applications such as MCU reset and system protection. For MCU reset, BU4231FVE-TR can be configured to detect over-voltage and under-voltage and triggers the reset signal when one of the thresholds is exceeded. In system protection applications, BU4231 can be configured to detect not just over-voltage and under-voltage but also clock fail, which can protect embedded system from malfunctioning due to misoperation. Additionally, BU4231FVE-TR can be used to monitor the temperature of a system, allowing the system to shut down when the temperature is too high to prevent permanent damage.

BU4231FVE-TR works by constantly monitoring the voltage supplied to the system and comparing it with the configured thresholds. If the monitored voltage is higher or lower than the set thresholds, BU4231FVE-TR will trigger a reset signal and other actions such as shutdown. The reset signal is a single pulse signal with the active level driven by the logic level of the selected pin. Likewise, when clock fail is detected, BU4231FVE-TR will also trigger a reset signal and other actions.

In summary, BU4231FVE-TR is a power supervisor that can be used in many embedded systems. It functions by constantly monitoring the voltage supplied to the system and compare it with the configured thresholds. When one of the thresholds is exceeded, BU4231FVE-TR will trigger a reset signal and other actions such as shutdown. As such, BU4231FVE-TR can be used in MCU reset and system protection applications.

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