LT3746IUHH#PBF

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LT3746IUHH#PBF Application Field and Working Principle

LT3746IUHH#PBF is a progressive current mode LED driver IC developed by Linear Technologies. It is perfect for use in a wide range of LED lighting applications such as LED displays, automotive lighting, street lighting, and LED bulbs. This LED driver is designed to drive arrays of LED strings up to 24W with high efficiency and accuracy. It offers an auto-dim mode, which helps in conserving power and enhancing the LED lifetime.

Features and Benefits

The LT3746IUHH#PBF features an adjustable frequency, voltage feedback loop for accurate output voltage, and over temperature protection. It also has an integrated pulse-width modulation (PWM) dimming input that supports dimming ratios up to 2000:1. Other features include high maximum 8V input range, low dropout operation with superior current accuracy, and wide operating junction temperature range of -40°C to +125°C. These features make the LT3746IUHH#PBF ideal for many LED lighting applications and allows it to provide optimal performance.

Applications

• LED Displays
• Automotive Lighting
• Street Lighting
• LED Bulbs

Working Principle

The LT3746IUHH#PBF LED driver operates in a progressive current mode. The total output current is set by programming the peak detection threshold. The output current is automatically adjusted based on the instantaneous feedback voltage. When the sense voltage is detected over the peak sensing threshold, the output current is then reduced. This enables the current remains constant and consistent even under varying loads. It also helps reduce power consumption as the current is adjusted when the LED brightness decreases.

The LT3746IUHH#PBF also supports PWM dimming methods. The pulse-width modulation input supports a wide range of dimming signals up to 2000:1. The LED can be dimmed with built-in current regulation capability without any flickering or noise. The auto-dim feature ensures maximum power conservation and the best LED display efficiency.

Conclusion

The LT3746IUHH#PBF is a high efficiency, programmable LED driver IC from Linear Technologies. It is widely used in a variety of LED lighting applications such as displays, automotive lighting, and street lighting. It features an adjustable frequency, voltage feedback loop for accurate output voltage, and supports PWM dimming. It also has an integrated over-temperature protection for better operating efficiency and longer life. With its easy to use features and reliable performance, the LT3746IUHH#PBF is perfect for any LED lighting project.

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