LT3845AEFE#PBF

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The LT3845AEFE#PBF is an advanced high voltage, high current, monolithic, synchronous, DC/DC switching controller. It is designed for applications that require both high performance and flexibility. It is ideal for automotive, medical and industrial applications. The LT3845AEFE#PBF is a high-end, high-power controller that is capable of operating up to 42V input and has a very flexible, configurable architecture. It provides a wide range of operating modes and a wide selection of control parameters, making it suitable for a variety of applications.The LT3845AEFE#PBF is a 3-Phase, Synchronous Buck Controller with Integrated FETs. The device is designed to operate in either buck, forward or low-side drive topologies. It supports a wide range of applications comprising; LED lighting, DC/DC converters, voltage regulators and motor drivers. The device is designed for high efficiency, low noise and stable operation with excellent load and line transient performance over its entire operating range.The LT3845AEFE#PBF features integrated power FETs, on-chip current sensing and over-current limit protection. It also features built-in soft start, adjustable current limit, programmable switching frequency and programmable under-voltage lockout (UVLO) for both the VDD and VREF pins. It also has an independent phase-enable input for dual phase applications. The device is supplied with a fixed 5V output bias and is fully protected against input under-voltage, output over-voltage, output over-current and thermal shutdown.The LT3845AEFE#PBF is a highly customizable device with many advantages over fixed-function devices. It is easy to program and configured, and its wide operational range makes it suitable for a variety of applications. The device is designed to be simple to use and time-saving in applications. The LT3845AEFE#PBF is well suited for high-power industrial and automotive applications and is available in a space-saving 24-pin package.The working principle of the LT3845AEFE#PBF is as follows. The device employs an advanced control scheme that utilizes a multi-phase architecture. For each phase, the device has an on-chip power FET, a current sense FET, and an associated control logic. The control logic monitors several parameters and modulates the power FET duty cycle to regulate the output voltage. The duty cycle is proportional to the input voltage, input current, and the programmed output voltage. The external components required to complete the power regulation circuit are minimal and are limited to an inductor and a few capacitors.

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