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The LT3743IUFD is a fixed frequency, synchronous step-down DC/DC controller designed to drive high current LEDs. The average current mode controller will maintain inductor current regulation over a wide output voltage range of 0V to (VIN - 2V.) LED dimming is achieved using analogue dimming on the CTRL_L, CTRL_H, and CTRL_T pins, as well as PWM dimming on the PWM and CTRL_SEL pins. By using load capacitors that are externally switched, the LT3743 is able to change the regulated LED current level in a few μs, providing accurate and high-speed PWM dimming between the two current levels. The switching frequency can be set from 200kHz to 1MHz using an external resistor on the RT pin.

Other features of the device include voltage regulation and overvoltage protection (set using a voltage divider connected between the output and FB pins). Overcurrent protection is provided and set by the CTRL_H pin.

Features

PWM dimming provides up to 3000:1 dimming ratio.

CTRL_SEL dimming provides up to 3000:1 dimming ratio between any currents.

Three-state current control for colour mixing

±6% current regulation accuracy

6V to 36V input voltage range

Average current mode control

Maximum recovery time of 2μs between any current regulation state

<1μA stopping current

Output voltage regulation and open LED protection

Thermally enhanced 4mm x 5mm QFN package

Applications

DLP projectors

High-power architectural lighting

Laser diodes

• 1.Is the inventory and price seen on the platform accurate?

  A: all online goods on the shelves can be ordered online, but considering the large liquidity of spot inventory, it is not possible to achieve 100% accuracy at present. In case of any abnormality, you can contact our company online and give the corresponding solution.

• 2.Are all our products genuine?

  A: our self-supporting products are from cooperative domestic and foreign original factories or authorized agents, and the source can be traced to ensure the original and authentic products.

• 3.Can you provide the qualification certificate of the original factory or agent?

  A: at present, our self-employed brands TI，ST，ADI，NXP，LATTICE，CYPRESS，INFINEON，XILINX and other first-line brands. Other channels are the original factory and agency channels. If necessary, we can communicate and confirm according to the specific brand and model.

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• 6.Can the company issue an invoice?

  A: you can issue ordinary invoices for individual users or special VAT invoices for enterprise users.