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LT3922 Buck Mode Schematic

Hi,

The schematic for a buck mode LED driver written in LT3922 datasheet page 27 seems not correct.

I tried this schematic on LTspice but I could not get correct data. LT3922 seems not to work since VIN=VSW and ILED=0A.

If it is not correct, please send your recommended schematic for a buck mode.

Thanks,

Kazu

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  • Hi,

    My design specific is below.

    Vin=3.3V to 5V, LED=1 piece (Vf=0.8V to 1.5V, If=1.5Amax), 10% to 90% PWM (f=10kHz) and DC voltage dimming needed. Does not accept uModule due to its package.

    If you have any suitable part (buck LED Driver), please let me know and give your recommeded schematic.

    Regards,

    Kazu

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