LP3874EMPX-3.3/NOPB

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Application Field and Working Principle of LP3874EMPX-3.3/NOPB

LP3874EMPX-3.3/NOPB is a power management integrated circuit (PMIC) designed for mobile and embedded systems. It belongs to the Voltage Regulators - Linear family, which provides linear regulation and protection to power supplies. This article will introduce its application field and working principle.

Application Field

LP3874EMPX-3.3/NOPB is an ideal PMIC for low-power portable applications. It offers a wide operating voltage range of 1.8V to 5.5V, making it suitable for portable devices operating between 1.8V and 5.5V and supports up to 6A output load. Its low quiescent current and high efficiency make it ideal for battery-powered systems and Perfect Power-Down (PPD) mode extends the life of batteries. In addition, its low minimum dropout voltage and low output impedance, make it suitable for applications with linear or switching supplies.

LP3874EMPX-3.3/NOPB also provides protection features to prevent system errors. It has full overvoltage protection (OVP) with foldback and a pre-biased start-up controller. Over-temperature protection is also provided by the internal thermal sensor. In addition, it can detect short circuit and output disconnect events, and the current limiting circuit ensures short-circuits are correctly handled.

Working Principle

LP3874EMPX-3.3/NOPB integrates a booster stage and linear regulator that allows for high efficiency and low noise. The booster stage takes care of the voltage step-up, while the linear regulator takes care of the output regulation and protection. The boost stage can provide up to 6-2A or 10A depending on the configuration. The linear regulator is powered by the output of the booster and its output is regulated to a predefined value.

The linear regulator provides a wide range of protection features, such as over-voltage protection, over temperature protection and current limiting. The OVP circuit monitors the output voltage and will fold back the output when it exceeds the predetermined OVP threshold. This prevents system errors due to over-voltage events. The internal thermal sensor ensures system stability by automatically shutdown when it exceeds a predetermined temperature threshold.

The current limiting circuit prevents short-circuits and output disconnects from damaging the system. The current limiting circuit limits the output current when a short circuit is detected or the output is disconnected. This prevents damage to the system due to excessive current. The PPD mode extends the battery life by automatically entering a low-power state when the system is not in use.

Conclusion

LP3874EMPX-3.3/NOPB is an ideal voltage regulator for low-power portable applications. It can support up to 6A output load and its low quiescent current and high efficiency make it suitable for battery-powered systems. It also offers a wide range of protection features, such as over-voltage and over-temperature protection, and a current limiting circuit that prevents short-circuit and output disconnect events. In addition, its Perfect Power-Down (PPD) mode provides automatic power-saving when the system is not in use.

The specific data is subject to PDF, and the above content is for reference