LT3517EUF#PBF

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Introduction
The LT3517EUF#PBF is an LED driver integrated circuit (IC) manufactured by Analog Devices, Inc. It is a 3-channel, constant-current LED driver, capable of delivering up to 25mA of drive current to each of three independent channels. The LT3517EUF#PBF is part of the LT3517EUF family of LED drivers designed for applications that require precise, multi-channel, constant-current sources. It is also suitable for applications such as video displays, LCD backlights, and architectural lighting.

Application Field
The LT3517EUF#PBF is well-suited for a variety of constant-current LED driving applications, including automotive ambient and interior lighting, signage, channel lettering, portable lighting, and decorative and accent lighting. Due to its low quiescent current and a low-power shutdown mode, the LT3517EUF#PBF is also ideal for applications with low-battery or power-constrained environments. Additionally, its rugged package and wide operating temperature range make it suitable for outdoor lighting applications.

Working Principle
The LT3517EUF#PBF is an efficient, low-power LED driver. It combines three constant-currentsinking circuits and three separate current-sinking strings into one integrated circuit. It can be configured to sink up to 25mA of current to each of its three channels. The LT3517EUF#PBF operates with a supply voltage range of 4.5V to 30V, and can source up to 72mA of current to each of its three channels. To ensure precise LED dimming, the LED driver incorporates a low-power analog dimming input. This analog dimming input allows the LT3517EUF#PBF to provide high-resolution, pulse-width-modulation (PWM) dimming, allowing for an even and smooth LED dimming performance.

The LT3517EUF#PBF also offers excellent protection features. It is protected against overload, short-circuit, and overtemperature conditions. Additionally, the IC includes a thermally-enhanced plastic package, making it suitable for high-power applications. Another feature of the IC is its wide operating temperature range, from -20°C to +85°C, which ensures reliable operation in environments with extreme temperatures.

Conclusion
In conclusion, the LT3517EUF#PBF is an ideal LED driver for precise constant-current-sinking applications. It offers multiple protection features, a wide operating temperature range, and reliable performance in low-battery or power-constrained environments. Additionally, its low power consumption and high resolution dimming capabilities make it an attractive choice for LED lighting solutions.

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