LT3840EUFE#PBF

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Introduction

LT3840EUFE#PBF is a fully integrated system power solution for applications that require isolated and monolithic control of one or more output voltages. It is an integrated voltage regulator of the Power Management IC (PMIC), providing a high performance switched voltage regulator for a large array of application fields. This article aims to discuss the application field and working principle of the LT3840EUFE#PBF.

Application Field

The LT3840EUFE#PBF is a high performance DC/DC converter controller, providing efficient and reliable power conversion in a variety of applications. From industrial and automotive power supplies to consumer products, the LT3840EUFE#PBF is capable of providing consistent and clean power to any device, helping to reduce its size and energy consumption. In particular, its features make it suitable for applications such as:

• DC/DC converters for automotive, industrial, and consumer applications
• Power converters for server and data center power supplies
• Portable digital device power supplies
• Decoupling converter solutions

Working Principle

The LT3840EUFE#PBF is a fully integrated DC/DC controller that combines two switching converters can run in either fixed frequency synchronous mode (with adjustable soft-start) or pulse frequency modulation (PFM) mode, with adjustable switching frequency and duty cycle. This allows for various types of power conversion solutions, including the provision of multiple predetermined output voltages, support for power sharing and tracking applications, and balancing multiple outputs. Additionally, the device has several protection features, including an adjustable 400mV internal reference voltage, over temperature protection, under voltage lockout, over voltage protection, and current limits.

The LT3840EUFE#PBF uses a synchronous pulse-width modulation (PWM) control architecture to provide high efficiency in its operation. In constant voltage (CV) mode, the device operates in a fixed-frequency mode and delivers energy to the output synchronously. In constant current (CC) mode, the device switches between two frequencies depending on the output current level and delivers current to the output using pulse frequency modulation (PFM). This allows for a low noise operation. Additionally, the device supports adjustable soft-start and fast overload protection.

Overall, the LT3840EUFE#PBF is an excellent choice for a variety of applications due to its wide range of features and high performance. Additionally, its multiple protection features allow for high reliability and safety in any system.

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