MP3351DQ-LF-Z

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The MP3351DQ-LF-Z is a downstep switching regulator dc-dc converter integrated circuit from Monolithic Power Systems, Inc. It is specifically designed to provide constant current for driving high-intensity Light-Emitting Diode (LED) arrays. This product belongs to the PMIC – LED Driver family and is categorized under Power Management Integrated Circuits.This integrated circuit consists of an internal N-channel power MOSFET and its gate driver, a precision reference, a controlled slew rate oscillator, a low-side current sensing configuration, a temperature indicator, protection circuits and an error amplifier. It is rated at a maximum operating voltage of 12 V. MP3351DQ-LF-Z works in a pulse width modulation (PWM) switching mode. The internal power MOSFET operates as a switch which is driven by the oscillator, enabling it to control the output current of the converter. The oscillator can be adjusted via a single external resistor, allowing the user to optimize the regulation performance.The current regulation is achieved by feeding the scaled output voltage of the current sensing circuit to the inverting input of the error amplifier. The positive side of the error amplifier is hooked up to the feedback loop for comparison with the internal reference voltage. The resulting error signal is used to provide a varying amount of voltage needed to drive the power MOSFET switch which, in turn, regulates the converter\'s output current.The MP3351DQ-LF-Z also provides several protection features. For one thing, it has an over-temperature indicator which offlines itself when the internal temperature of the device reaches a certain threshold. Additionally, it has built-in thermal shut-down protection that shuts the device down and reverts back to normal operation when the temperature returns to acceptable conditions. Finally, the product also provides over-voltage, current-limit, and under-voltage protection.The MP3351DQ-LF-Z is primarily used for driving high-intensity LED arrays. It is designed to provide constant current and can be used in various applications such as automotive instrument clusters, backlighting of television sets and cell phones, LCD monitors and lighting for LCD backlights. Furthermore, its versatile array of protection features make it ideal for automotive systems and other applications in which a reliable and high-performance power source is needed for LED illumination. Thanks to its high power efficiency of more than 90% and the ability to be directly powered from battery storage cells, the MP3351DQ-LF-Z is a cost-effective solution for obtaining optimal LED performance.In summary, the MP3351DQ-LF-Z is a downstep switching converter integrated circuit which, thanks to its advanced architecture, high switching frequency and constant current control, is an ideal solution for driving high-intensity LED arrays. It performs specifically in the category of PMIC – LED Drivers, providing several protection features and the ability to be directly sourced from battery storage cells. It offers excellent performance in terms of power efficiency, making it a cost-effective solution for achieving optimal LED performance.

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