BU4922F-TR

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PMIC (Power Management Integrated Circuit) supervisors are used to ensure accurate and reliable operation of electronic systems. The BU4922F-TR is a supervisor with two independent power-fail detection circuits, which makes it suitable for a range of battery-powered applications. This article will outline the application field and working principle of the BU4922F-TR.

Application Field

The BU4922F-TR is used to prevent system data loss caused by incomplete power shutdown or reset, which makes it suitable for battery-powered applications. It is ideal for use in large configurations such as personal computers and large industrial systems, as well as smaller ones such as portable medical devices, or battery-powered equipment. In addition, its dual power-fail function can be used in automotive and communication industries. The BU4922F-TR can be used to generate periodic reset signals in unsupervised cases, which is suitable for applications such as automatic testing, industrial automation, and digital signage.

Working Principle

The BU4922F-TR uses a voltage input for power-fail detection. The voltage input is monitored by the BU4922F-TR, and when the monitored voltage reaches a certain level, an instantaneous reset is generated to prevent data corruption or other issues associated with incomplete power shutdown or reset. The power-fail voltage can be set using external resistors.

The BU4922F-TR also has a delay reset function to ensure that the reset signal is only generated after a set period of time. This delay setting can also be adjusted via external resistors. This delay can be used to ensure that when the power is restored, the system is in a known state.

The BU4922F-TR has a shutdown output which can be used to shut down the system in the event of a power failure. This output is triggered as soon as power-fail is detected and it will remain active until the power-fail condition is removed. It can be used to shut down a system before it loses power or data.

Conclusion

The BU4922F-TR is a power management integrated circuit with dual power-fail detection circuits. It is suitable for application in battery-powered systems such as personal computers, portable medical devices, and battery-powered equipment. Its power-fail voltage and delay reset functions can be adjusted using external resistors. The BU4922F-TR also has a shutdown output, which is triggered when power-fail is detected and remains active until the condition is removed.

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