LT3795IFE

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LT3795IFE is a monolithic IC LED driver developed by Linear Technology, capable of powering LED strings with up to 24V. Its main applications are in LED backlight, general lighting, and automotive use cases, and it can be used to drive both CC (constant-current) and CH (constant-voltage) LED strings. It does this by utilizing a highly efficient DC-DC converter for power conversion, as well as an advanced current regulation scheme for maintaining LED brightness.

The LT3795IFE has a few advantages over other LED drivers, such as a wide input voltage range (2.2-24V) and a high-efficiency synchronous DC-DC converter with a maximum efficiency up to 95%. Another benefit of the LT3795IFE is its high level of programmability, allowing designers to change the LED current and brightness instantly. In addition, the device can be used to drive multiple strings of LEDs in parallel, allowing for more flexibility in LED dimming designs.

One of the key features of the LT3795IFE is its current regulation scheme. This enables control of the output current to precise levels, for long and consistent LED brightness. The device achieves this by employing either an external resistor or an internal voltage DAC to regulate the peak current, depending on the application requirements. The DAC is advantageous in applications where frequent and varied dimming levels are needed.

The LT3795IFE also has a soft-start feature to protect the LED strings from current surges during startup and when connecting to the power source. In addition, the device offers several safety features, such as under-voltage lockout, output over-voltage protection, and open LED protection.

Overall, the LT3795IFE is an ideal solution for driving LED strings for applications where high levels of light output and efficiency are needed. Its wide input voltage range, high efficiency synchronous DC-DC converter, and current regulation scheme make it an attractive option for LED lighting designs. Its programmability and safety features also make it an ideal choice for automotive or industrial applications.

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