XR18910ILEVB

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Evaluation and Demonstration Boards and Kits provide an excellent platform for testing, experimenting and evaluating integrated circuits and devices. XR18910ILEVB is an evaluation and demonstration board from Maxim Integrated. In this article, the application field and working principle of the board will be discussed.

XR18910ILEVB is an LED driver IC for providing buck lighting with many features. The board comes with a low-input voltage LED buck driver, which allows the user to drive up to 4 channels of LED with low Input voltage. The board includes up to four channels configured with Vin 5V, VDD 2.85V and up to 1A load per channel. The board also comes with a user friendly PC GUI software package which provides a real-time visualization of the output LED buck channels.

The XR18910ILEVB is designed primarily for use in LED backlight systems. The board can be used to create low-voltage LED lighting applications like LED strips, lamps, decorative lights, and even environment lighting. The board is also ideal for lighting display applications such as LCD or plasma screens, high visibility industrial displays and medical imaging.

The operating principle of the XR18910ILEVB board is quite simple. The board has an integrated buck regulator that operates in four modes – continuous (CC), pulse clamp (PP), pulse skip (PS), and pulse pinch (PP). Each of the modes provides a different way of controlling the LED output current, and is programmable via a single Pulse-Width Modulation (PWM) input. The board also provides a low-ripple LED current over the entire input voltage range and a reduced EMI. The board also enables dimming control by adjusting the PWM signal frequency and duty cycle.

The XR18910ILEVB offers maximum efficiency, with a typical efficiency of 93% in DC/DC conversion. The board also has an adjustable PWM frequency and is protected from short-circuit, over temperature, and overload conditions. The board can operate at temperature ranges of -20 to +85C and provides variable brightness across multiple LED channels.

Overall, the XR18910ILEVB from Maxim Integrated is an excellent evaluation and demonstration board for low-voltage LED lighting applications. It provides a complete LED driver solution, including a low-input voltage LED buck driver, PWM frequency control, dimming adjustment, and maximum efficiency. It is also well protected from short circuit, over temperature, and overload conditions, making it an ideal evaluation and demonstration board for testing, experimenting, and evaluating LED lighting systems.

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