BU4927G-TR

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The BU4927G-TR is part of a series of power management integrated circuits (PMICs) from ROHM Semiconductor. This particular device was designed and manufactured with supervisors in mind, making it a perfect fit for applications where maintenance of input voltage must be strictly monitored. This article will explore the BU4927G-TR’s application field and its working principle.

The BU4927G-TR is a voltage supervisor capable of detecting voltages between 1.5 V and 5.5 V. It contains two separate analog comparators, one for high voltage detection and another for low-voltage detection. The device also comes with an onboard type reset circuit and a power-on reset function. This makes it ideal for applications requiring precise monitoring of voltage levels including power supplies, computer motherboards, automotive systems, and more.

The BU4927G-TR is built to remain stable during the startup cycle, and its output delay time can be adjusted between 500 μs and 5 ms. The device also has a data input function and a detection function, both of which can be disabled or enabled using the appropriate data pins. This provides the user with a degree of control over the voltage supervising process and allows them to tailor the process to specific applications. Furthermore, the total current consumption can be reduced to a minimum, ensuring minimal impact on the device being monitored.

When it comes to working principle, the BU4927G-TR operates on a two-stage detection system. After the power supply is turned on, the first stage detects the voltage level of the input signal. This is followed by the second stage, where the voltage signal is measured and compared against the reference voltage. If the measured signal is equal to or higher than the reference voltage, the output pin becomes “high” and the voltage supervisor is completed. However, if the measured signal is lower than the reference voltage, the output pin becomes “low” and the process repeats. The reference voltage is usually set at a value lower than the normal working voltage, allowing the BU4927G-TR to detect any potential deviations in the input signal.

In conclusion, the BU4927G-TR is a key member of ROHM Semiconductor’s PMIC offering, providing precise voltage monitoring capabilities. It is well-suited to a wide range of uses, such as power supplies, computer motherboards, and automotive systems. The device is also configured to operate on a two-stage detection system, making it an effective tool for identifying potential voltage losses. It also offers adjustable delay times, data input blocking, and low-power consumption, further increasing its utility in its designated application field.

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