BD46481G-TR

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PMIC, or Power Management Integrated Circuit, are components used in a variety of applications including computers, portable electronics, automobiles, and engineering equipment. The BD46481G-TR is a single and dual-channel supervisory circuit which can provide a range of features to allow for improved safety, durability, and performance for many devices and systems. This article will discuss the application field and working principle of the BD46481G-TR.

Application Field

The BD46481G-TR is a highly specialized supervisory circuit sold by ROHM Semiconductor. This circuit has been designed to provide reliable protection from power surges and drops in systems that incorporate 1.8V or 3.3V circuitry. This can be particularly useful for systems that require multiple power supply sources or which run on a high-speed bus. These cases require careful attention to the status of the voltage level, and this is where the BD46481G-TR can help.

The BD46481G-TR can be used in various applications, such as automotive, automotive systems, home appliances, medical equipment, and industrial machinery. Automotive systems often require a reliable low-voltage monitoring circuit, as large voltage drops can cause critical problems such as engine shutdown or loss of control systems to occur. Home and industrial appliances, medical equipment, and industrial machinery can also benefit from the BD46481G-TR as these systems may require protection from voltage spikes or drops. Overall, the BD46481G-TR is a reliable, cost-effective solution for many power supply applications.

Working Principle

The BD46481G-TR utilizes an Analog Voltage Comparator (A/VCOM) to measure the difference between a reference voltage and an input voltage. When the input voltage rises above or falls below the reference voltage, the A/VCOM triggers the component’s fault detection function. This function then initiates an output signal, which is either a logic LOW or HIGH signal depending on the configuration of the component.

The A/VCOM can either be connected to a dedicated analog input or, more commonly, to a voltage divider network. This network of resistors creates a circuit which divides the input voltage into two, allowing the BD46481G-TR to accurately compare the voltage at both parts of the circuit. This is an important factor in ensuring stable operation of the component.

The BD46481G-TR also integrates a fault timer, which is used in addition to the voltage comparator to accurately detect any faults in the system. This timer is used to ensure that the component does not falsely trigger on a brief voltage drop or over voltage. The integrated timer also helps improve circuit stability as it prevents the component from triggering sudden voltage drops. This can also result in reduced power consumption.

The BD46481G-TR also features built-in surge protection using an LDO or a TVS diode, depending on the model of the component. The LDO helps ensure stable operation of the component, while the TVS provides a fast response to surges in the system.< This helps protect the component from any sudden changes in the voltage supply, making it a reliable and cost-effective solution.

Conclusion

The BD46481G-TR is a reliable, cost-effective PMIC designed by ROHM Semiconductor. It can be used in many applications and is highly versatile, featuring an A/VCOM for accurate fault detection, an integrated fault timer for improved stability, and surge protection. The BD46481G-TR single and dual-channel supervisory circuit can provide a great range of features to ensure improved safety, durability, and performance in many devices and systems.

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