BU4927F-TR

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PMIC (Power Management Integrated Circuit) is one of the most important components in embedded systems, and supervisors are one of its most important sub-categories. In this article, the application field and working principle of BU4927F-TR, a supervisor IC from ROHM, will be discussed.

BU4927F-TR is a very versatile supervisor, with functions including voltage detection (VD), watchdog timer (WDT timer) and reference voltage generator (ref. generator). It is suitable for use in wide range of applications, including consumer, healthcare and automotive electronics.

The VD function in BU4927F-TR can detect power supply voltage, including VCC, VBAT and VRTC. Built-in voltage detection ranges include 4.25V, 3.1V, 2.8V, 1.95V and 0.95V. This makes BU4927F-TR an ideal choice for applications requiring precision voltage detection and feedback control.

The WDT timer function can detect input signal instability and take corrective action. It can detect low or high signal, or signal at fixed time intervals. A reset signal is generated if the input signal is outside of the programmed range for the prescribed time. The WDT timer can help enhance system reliability and reduce power consumption.

The ref. generator in BU4927F-TR is an accurate voltage reference. It is used to ensure stable circuit operation. The generator can generate five different reference voltages: approx. 0.9V, 1.2V, 1.5V, 2.1V and 2.4V. These references can be used for different applications, such as providing stable power supply.

In short, the BU4927F-TR is an ideal choice for applications requiring precise voltage detection and feedback control. Its versatility and reliable design makes it suitable for a wide range of applications in the consumer, healthcare, and automotive markets.

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