BD4731G-TR Integrated Circuits (ICs)

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The BD4731G-TR is an ultra-low quiescent current, high-accuracy and general-purpose power supply monitor, making it highly suitable for applications that require low power draw and minimal stability. It is a PMIC - Supervisors device frequently used in a variety of different applications, including LED drivers, power converters, power distribution systems and end-node monitoring systems.

The BD4731G-TR is a device composed of three regulators that control the voltage detected by three input pins: undervoltage (UV), overvoltage (OV) and power down (PD). Additionally, the device has an adjustable power-on reset (POR) output to disable the main power after a specified threshold is detected. This ensures that the system monitors any irregularities in the input voltage, and that the system is shut down if it drops outside the safe voltage range.

Under normal conditions, the device monitors the incoming voltage and compares it against thresholds set by the user. If the voltage is within range, the device remains in a low-power state, consuming around 0.5µA. The device has a built-in hysteresis of 10mV, which helps limit the number of false alarms by preventing the device from oscillating between normal and error states when the voltage fluctuates.

When the input voltage deviates from the predetermined range, the OV or UV pins are activated, depending on the direction of the voltage deviation. The OV and UV pins can be monitored by an external processor or microcontroller, thus allowing the system to take appropriate action such as shutting down, sending an alarm or switching to a backup power source. Additionally, when a voltage abnormality is detected, the device shifts to a high-power state, consuming around 0.25mA.

The power-down pin, PWRDN, can be used to shut down the entire system in case of power faults, such as short circuits and overcurrents. When the PWRDN pin is activated, the device triggers a warning and shuts down the system.This helps protect the connected components and prevents fires and other dangers.

The BD4731G-TR is an ideal power monitor for most applications due to its small size, low power usage, high accuracy and adaptability. The wide range of features and adjustable thresholds make it well-suited for both low- and high-power environments, making it a versatile and reliable monitoring solution.

Overall, the BD4731G-TR is a highly reliable and cost-effective power monitoring solution that is suitable for most applications. Its wide range of features and adjustable thresholds make it well-suited for both low- and high-power scenarios, providing a reliable and accurate solution for monitoring incoming voltage. As a PMIC - Supervisors device, it is an excellent choice for applications that require low power draw and minimal stability.

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