The LT3761EMSE#TRPBF from Analog Devices is a highly integrated, high-performance LED driver controller designed to meet the demanding requirements of advanced lighting systems. This device stands out for its ability to deliver precise and stable current regulation, making it an ideal choice for applications ranging from automotive and architectural lighting to high-brightness display backlighting and industrial illumination.

At its core, the LT3761 is a current mode step-up (boost) controller that can also be configured for SEPIC or buck-boost topologies. This flexibility allows it to maintain a constant LED current from input voltages that can be above, below, or equal to the LED string voltage. It features a wide input voltage range of 4.5V to 60V, accommodating various power sources, including automotive batteries and industrial power buses. Its internal 150mA boost regulator provides the gate drive for an external N-channel MOSFET, simplifying the power stage design.

A key strength of the LT3761 is its high-side sense current regulation. By sensing the output current directly, it ensures exceptional accuracy of ±3% across a wide output current range, which is critical for maintaining uniform brightness and color consistency in multi-LED strings. The device supports PWM dimming ratios as high as 3000:1, enabling smooth and flicker-free dimming control for creating dynamic lighting effects. For even finer control, it also offers analog dimming capability.

The controller incorporates a host of protection features to ensure system robustness and reliability. These include open-LED and short-circuit protection, input and output overvoltage protection, and a programmable undervoltage lockout (UVLO). Its fault-tolerant design is further enhanced by the ability to synchronize to an external clock, reducing noise and preventing interference with sensitive electronics in the system.

Housed in a thermally enhanced MSOP-16 package, the LT3761EMSE#TRPBF is built for performance in challenging environments. Its high level of integration, combined with its programmability and robust feature set, provides designers with a powerful platform to build efficient, compact, and reliable high-power LED driving solutions.

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**Keywords:**

1. LED Driver Controller

2. High-Performance

3. Current Regulation

4. PWM Dimming

5. Boost Converter