LTC3454EDD#PBF

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PMIC - LED Drivers - LTC3454EDD#PBF Application Field and Working Principle

The LTC3454EDD#PBF is an adjustable constant-current LED driver that is small-signal transistors and ideal diode synchronized buck-boost converter utilizing a high frequency integrated inductor. It is designed to allow LED driving with a maximum LED current of 150mA. The device is composed of two identical channels and a high efficiency (up to 94%) buck-boost converter. Each channel provides a maximum LED current of 150mA and is designed to offer a wide input voltage range of 4.5V to 40V. This wide operating voltage range offers a great level of flexibility for design in different applications and also assists in providing uniform led brightness for various supply levels. It can also enable various LED combination patterns and improves efficiency by utilizing the appropriate output voltage.

The device utilizes a switching frequency of 2.25 MHz, this is much higher than other available devices and offers high efficiency along with low electromagnetic interference (EMI). The constant current output is adjustable to a maximum of 150mA and is independent of input voltage, enabling consistent LED brightness over a wide input voltage range. In addition to the adjustable output current, the device offers a number of protections such as thermal shutdown and current limit by setting the temperature to an internal trim current.

The LTC3454EDD#PBF enables multiple LED combination patterns and its wide operating voltage range allows designers to take full advantage of the available output voltage on multiple channels. This allows them to design their own combination of series and parallel current settings and obtain maximum efficiency outputs without having to worry about the input voltage.

Overall, the LTC3454EDD#PBF is an excellent solution for driving multiple LEDs with reliable current outputs. As an adjustable output current LED driver, its high switching frequency, low EMI, and low quiescent current make it an ideal choice for a wide range of lighting and industrial applications.

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