LT3763HFE

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The LT3763HFE is a high-efficiency, constant-current, high-voltage LED driver integrated circuit (IC) for driving strings of LEDs in series. Manufactured in a tiny 5-pin SOT-23 package, it is a popular choice for driving LEDs from low-voltage sources. It is designed to provide constant current across LED strings even with wide LED voltage variations, hence eliminating the need for complex LED string current-setting feedback or dc-dc converters. The LT3763HFE is a well-rounded IC solution for simple LED driver implementations.

Applications for the LT3763HFE include LED backlighting, panel displays, decorative and architectural lighting, signage, automotive and medical lighting, and more. It can also be used to drive solenoid valves coils and other low-voltage inductive loads.

The LT3763HFE has an adjustable open circuit voltage between 10V and 65V and can provide a complete range of dimming levels. The operating temperature range is -40°C to +85°C, and it can operate with a maximum on-time of 1.5s. The LT3763HFE can also offer current limits ranging from 5mA up to 300mA depending on the type of load being driven.

The LT3763HFE also features an internal oscillator that runs automatically when the IC is powered, causing the maximum on-time (MOT) to become adjustable. This feature allows for fine tuning of the oscillation frequency, and thus for an optional external dimming control to be added for additional flexibility and tuning. This way, the LED brightness can be dimmed and dimming levels can be adjusted to the user\'s preference.

The main feature of the LT3763HFE LED driver is its ability to provide constant current to LED strings, even through wide LED voltage variations. This is achieved by using a proprietary buck-boost converter configuration. The buck-boost converter is capable of switching seamlessly between buck and boost modes to maintain a constant current regardless of the LED string voltage. This eliminates the need for complex feedback loops or dc-dc converters, thus making the LT3763HFE a simple and easy-to-use LED driver solution.

The LT3763HFE also includes an overcurrent protection feature that protects the LED strings from overloading. If an overcurrent event occurs, the device will shut off the LED strings and switch to short circuit protection mode. This prevents damage to the LED strings by shutting off the power to them in the event of an overload.

The LT3763HFE is a popular choice for driving LED strings from low-voltage sources. Its adjustable open circuit voltage and current limits combined with its buck-boost converter configuration make it suitable for a wide range of applications. It is also simple to use and requires no complicated feedback loops or dc-dc converters. Thanks to its robust protection features, the LT3763HFE is an excellent choice for driving LED strings.

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