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The LT3942JUFD synchronous buck-boost converter is a monolithic four-switch synchronous buck-boost LED driver. The driver regulates LED string current up to 34V at input voltages above, below, or equal to the output voltage. proprietary peak buck/peak boost current mode control scheme supports adjustable and synchronisable 300kHz to 2MHz fixed frequency operation, or internal 25% delta spread spectrum operation for reduced EMI. the LT3942JUFD has a 3V to 36V input and 0V to 36V output, and supports seamless low-noise transitions between operating regions, making it ideal for LED driver applications in automotive, industrial and battery-powered systems.

Features

4-switch single inductor architecture enables VIN to be greater than, less than or equal to VOUT

Proprietary peak-buck/peak-boost current modes

Input voltage range: 3V to 36V

Output voltage range: 0V to 36V

±1.5% output voltage regulation

±3% LED current regulation

5000:1 external and 128:1 internal PWM dimming

Rail-to-rail LED current sense and monitor outputs

Open and short LED protection with fault report function

300kHz to 2MHz fixed switching frequency for synchronisation with external frequency

Flicker-free spread spectrum for low EMI

Available in 28-pin QFN package (4mm × 5mm)

Applications

General purpose LED drivers

Automotive and industrial lighting

Voltage regulators with precise current limit values

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  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.

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  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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