BD4939FVE-TR

Series:	BD49xxx
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Voltage Detector
Number of Voltages Monitored:	1
Output:	Push-Pull, Totem Pole
Reset:	Active Low
Reset Timeout:	--
Voltage - Threshold:	3.9V
Operating Temperature:	-40°C ~ 105°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SOT-665
Supplier Device Package:	5-VSOF
Base Part Number:	BD49

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Introduction

The BD4939FVE-TR is a power management integrated circuit (PMIC) - Supervisors with outstanding protection features for a variety of applications. This device comes with low-voltage power-on reset monitoring, output voltage monitoring, over-current monitoring, and short-circuit protection. It is designed with a thin-film transistor (TFT) structure, and it is capable of controlling other external power devices including the gate drive of a power MOSFET or IGBT. This PMIC-Supervisors is very versatile and can be used in vehicle, home, office, industrial, and consumer device applications. It is capable of adapting to changing conditions and mitigating power failures when they occur.

Features

The BD4939FVE-TR integrated circuit comes with a number of features that make it suitable for a variety of applications. It features adjustable insulation time and reset thresholds, active high or low reset pins, power-on reset monitoring and output voltage monitoring over a wide range- 2.4V to 7V. It has short-circuit protection that can detect abnormal power supply or abnormal state of the output circuit and shut off the output circuit automatically. It is also provides a die thermal protection feature that monitors die temperature and shuts off the output when it reaches a specified limit. The device can monitor the output voltage of multiple supplies, and it can be used for a number of power management functions such as system reset, power failure detection, and over-current detection. It is also capable of controlling other power management components like buck converters, power FETs, and IGBTs.

Applications

The BD4939FVE-TR integrated circuit has a wide range of applications. It can be used in consumer devices, including laptop computers, home audio systems, and medical devices. It is suitable for automotive applications such as automotive current sensing, engine speed monitoring, and controller area network (CAN) devices. It is also suitable for industrial control systems, power supply systems, and automotive control systems. In addition, this integrated circuit is well-suited for telecommunication systems, power management systems, and electrical vehicle systems.

Working Principle

The BD4939FVE-TR integrated circuit works by monitoring the voltage of the power supply, the power consumption of the device, and the temperature of the die. It has a thermal sensor that monitors the temperature of the die. When the die temperature exceeds a predetermined threshold, the integrated circuit shuts off the power supply. It also has a circuit that continuously monitors the voltage of the power supply and automatically adjusts the power output when the voltage drops below a predetermined threshold. Furthermore, it has a current-limiting circuit that detects excess current draw on the output circuit and automatically adjusts the power output accordingly. Finally, it has a Reset circuit that monitors the output voltage and automatically resets the device to a safe state if the power fails or the power supply voltage drops below a predetermined level.

Conclusion

The BD4939FVE-TR is a power management integrated circuit (PMIC) - Supervisors that provides outstanding protection for a variety of applications. It has adjustable insulation time and reset thresholds, active high or low reset pins, power-on reset monitoring and output voltage monitoring, short-circuit protection, and a die thermal protection feature. It can be used in consumer devices, automotive applications, industrial control systems, power supply systems, and telecommunication systems. It monitors the voltage, power consumption, and temperature of the die and adjusts the output accordingly. Additionally, it has a reset circuit that monitors the output voltage and resets the device to a safe state if the power supply fails.

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