BU4819F-TR

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Simple Reset/Power-On Reset
Number of Voltages Monitored:	1
Output:	Open Drain or Open Collector
Reset:	Active High/Active Low
Reset Timeout:	--
Voltage - Threshold:	1.9V
Operating Temperature:	-40°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	4-TSOP (0.049", 1.25mm Width)
Supplier Device Package:	4-SOP
Base Part Number:	BU48*

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Introduction

BU4819F-TR is a Power Management Integrated Circuit (PMIC) Supervisors, it is a tiny device used for a variety of applications ranging from protecting electronics from power surges and faults to providing monitoring of power supply voltage inputs. The BU4819F-TR operates from a 5.0V to 17.0V input voltage and is capable of providing a logic signal to signal normal power supply conditions. This device further provides sensing of changes in input voltage and accuracy of 2%. It also has standardized features like active current limit protection, thermal overload protection, undervoltage lockout and active current flow modulation (active modulation is enabled only at higher output currents).

Application Fields

The BU4819F-TR supervisor IC is used in a variety of industries, including those that require precision control, reliable operation and improved voltage regulation, such as medical, automotive, and aerospace applications. In medical instruments, it is often used to ensure proper power delivery to prevent damage or instrument malfunction, as well as for patient safety. The automotive industry uses the BU4819F-TR for its ability to protect systems from overvoltage and short-circuit conditions, as well as to provide stable and reliable power supply. In the aerospace industry, the BU4819F-TR is used to provide precision control, reliable operation and improved voltage regulation in applications like avionics, satellite telemetry and tracking systems, and space probes.

Working Principle

The BU4819F-TR supervisor IC provides precision voltage control by utilizing active power and voltage monitoring. The BU4819F-TR is designed as a two-channel voltage regulator, with each channel providing a regulated voltage output within +/- 2%. The internal architecture of the BU4819F-TR consists of two internal half-bridges and one power regulator. These are connected within a power conversion path, which allows the device to respond to temperature changes and input voltage fluctuations. In response to the input voltage, the measured voltage is propagated to the output voltage through the two half-bridge structures. This allows the BU4819F-TR to maintain precise voltages over a wide range of input voltages.The active current limits also feature in the BU4819F-TR. This current limiting feature prevents damage to itself and other devices by disconnecting the output if an overload occurs. The active current limit protection depends on the input voltage and output voltage, and the power supply set-up. The current can be easily adjusted through an external capacitor.

Conclusion

The BU4819F-TR is an advanced Supervisor IC that offers many benefits for industrial, automotive, aerospace and medical applications. It provides precise voltage control, active current limiting and overvoltage protection, active modulation of current flow, as well as thermal overload protection. Through its two-channel voltage regulator and power conversion path, the BU4819F-TR can maintain precise voltage levels with high accuracy over a wide input voltage range, while also providing important features such as current limit protection and active modulation.

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