BD4928G-TR Integrated Circuits (ICs)

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PMIC (Power Management Integrated Circuit) supervisors are important devices used to control voltage and current levels in electronic circuits. They monitor voltages and currents and provide a warning signal if these levels exceed specified limits, thereby protecting components of the circuit in question. The BD4928G-TR is one such PMIC supervisor, marketed by ROHM Semiconductor. In this article, we take a look at this device as well as its application fields and working principle.

Overview

The BD4928G-TR is a bi-directional PMIC supervisor designed to control power supply voltages, currents, and ripple patterns in industrial and other applications requiring high-precision control. It has a maximum voltage of 6.5V, a measured current of up to 1.2A, and a minimum operating temperature of -10°C. It features a temperature compensation function for improved accuracy, as well as a wide range of setting and detection accuracy options.

Application Fields

The BD4928G-TR is suitable for a number of application fields, including industrial automation systems, automotive electronics, servers, and motor control systems. In each of these applications, it can play a central role in ensuring a stable voltage supply, by controlling the current and countering any spikes or drops in the system.

Working Principle

The BD4928G-TR works by comparing the voltage level of a node to the nominal voltage, with the help of an internal voltage reference. It then outputs feedback signals for the controller to take any necessary action. The output signals are accompanied by a temperature compensation feature, which helps to enhance the accuracy of the output.

Moreover, the supervisor is also equipped with two internal monitoring circuits, allowing it to monitor both under-voltage and over-voltage/current conditions. It is capable of detecting spikes of up to 200mVp-p, along with any load variations of up to 10A. If either of these conditions is detected, then the supervisor trips and halts the power supply.

Conclusion

The BD4928G-TR is a powerful bi-directional PMIC supervisor designed to provide a stable power supply to electro-mechanical systems. It can be used in a variety of application fields, and its temperature compensation function ensures that the output signals remain accurate at all times. The supervisor is also equipped with two internal monitoring circuits, allowing it to detect under-voltage and over-voltage/current conditions. Overall, the BD4928G-TR is an excellent observation tool for controlling and monitoring power supply voltages and currents in many types of electrical systems.

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