BU4840G-TR

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PMIC or Power Management Integrated Circuits are almost indispensable for modern computing and multimedia applications. Supervisors in a PMIC are typically very small and low power components which provide temperature, voltage or current protection for semiconductor devices. They also provide over- and under-voltage, over- and under-temperature monitor and protection, as well as very short circuit, reverse current, and current limiting protection.

BU4840G-TR, manufactured by ROHM Semiconductor, is an advanced PMIC Supervisors specifically designed for portable electronic equipment. It is a voltage protect IC that provides over-temperature protection with thermal shutdown, over-voltage protection, under-voltage protection, Lock detection and thermal alarm functions. This IC operates as a fault detector and comes with a built-in thermal shutdown timer for safety, making it ideal for battery powered applications that require high accuracy monitoring, such as laptop computers, tablet PCs, and mobile phones.

The basic application field for BU4840G-TR IC is detecting the occurrence of fault conditions, such as overvoltage, undervoltage, over-temperature and low battery. The IC is equipped with an internal delay timer that allows it to detect the absence of an input signal, such as the battery voltage, with greater accuracy and stability, making it suitable for battery powered applications.

BU4840G-TR can detect over-voltage and under-voltage conditions, as well as over-temperature conditions. Its Lock detection function also allows it to detect when inputs to the IC are not synchronized with the reference voltage. The thermal alarm function shuts off the power supply when the internal temperature of the IC exceeds a certain predefined threshold. All of these features allow BU4840G-TR to provide effective protection for battery powered applications and portable electronic equipment against voltage and temperature-related faults.

The working principle of BU4840G-TR is quite simple: it monitors the voltage of an input signal, such as the battery voltage, and compares it to an internal reference voltage. If the input signal exceeds or falls below the reference voltage by an amount that exceeds the detection threshold, BU4840G-TR will shut off the power supply and trigger a protective action. Additionally, BU4840G-TR will shut off the power supply if the internal temperature of the IC exceeds a certain predefined threshold.

To sum up, BU4840G-TR is an advanced PMIC Supervisors specifically designed for use in portable electronic equipment. It provides excellent over-voltage, under-voltage and over-temperature detection and protection, as well as thermal alarm and lock detection functions. Its built-in delay timer allow it to detect the absence of an input signal with greater accuracy and stability. All these features make BU4840G-TR a great choice for battery powered applications that require reliable voltage and temperature protection.

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