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Introduction

The BD46402G-TR is a Voltage Supervision IC developed by ROHM, mainly designed to monitor and accurately reset the voltage drop of microprocessors, system controllers, and other various types of standard IC products. Its input voltage is 5V to 26V and it is available in TSSOP and USON packages. It provides a wide range of features, including an adjustable time delay, level sensitivity, overvoltage features, adjustable reset output conditions, etc. It is specifically designed for applications such as industrial control, data transmission and security systems.

Application Fields

Since the basic purpose of BD46402G-TR is to monitor and accurately reset the voltage drop of microprocessors, system controllers, and other types of ICs, it’s mainly used in multiple applications. In data transmission systems, it can be used as a power supply stabilizer, which monitors and supports the power supply on communication devices. As the power drops, the BD46402G-TR will promptly perform a reset to ensure that the voltage returns back to a stable state. Moreover, it can also be used in security systems, where it monitors the supply voltage for certain circuits and reset the systems when unexpected voltage drops occur.

In industrial control systems, its role is to monitor the current as well as the supply voltage of the system. It continuously checks the current level and the output voltage of the electrical circuit to detect over-input or dropvoltage of the power supply. It is used in order to maintain a stable voltage level, preventing any damaging malfunction. Additionally, it is used in the automotive industry too, both in sensors and other automotive systems, to ensure the fast-recovery and accurate reset of the voltage after crashing events.

Working Principle

The BD46402G-TR is composed of two terminals, TOUT and VIN, which are connected to the power supply and microcontroller, respectively. The TOUT terminal starts to detect the voltage drop when the microcontroller is powered up. When the power supply reaches the level of VIN, the TOUT terminal sends an output signal, which activates the reset. It provides a wide array of features, including adjustable time delay, level sensitivity and overvoltage features. It also includes an adjustable reset output condition so that it can be configured for different types of power applications.

When the voltage level falls below a certain level, the “U/L” terminal sends a low level.The time delay adjusts the time it takes for the IC to output the low level.The IC continues to monitor voltage levels and sends low level signals when the voltage is below the input voltage level.The “EN” terminal is used to control the IC\'s operating modes, and the “L/R” terminal outputs a low level when the voltage is above the threshold and a high level when the voltage is below the threshold.

Conclusion

The BD46402G-TR is a Voltage Supervision IC which is mainly used in industrial control systems, data transmission, and security systems to monitor and accurately reset the voltage drop of microprocessors and ICs. It is composed of two terminals and provides a wide range of input/output features, such as adjustable time delay, level sensitivity and overvoltage features. It is specifically designed for reliable and accurate power supply stabilization, thus ensuring the proper functioning of sensitive electrical circuits.

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