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8A pulsed LED drive

Ed Walker
Prodigy 5 points
Other Parts Discussed in Thread: LM3410

I have a design needing to pulse a medical LED, 1.0-2.5Vf, at 8Amps.
100Hz to 10kHz, 50% duty cycle.
Power is from a high amp hour LiIon cell, 3-4.2V.

Do you have any ideas for achieving this high current pulse?

A 22F supercap is being considered to provide holdup for the LED driver during the pulses.

  • 0
    Prodigy 5 points

    We only have one part which work from single cell Li batteries and it is an integrated FET device which is not capable of 8A.  LM3410.  We have some DLP/projector parts which made for this kind of performance (LM3433/34), but they need negative rail.  

    Also with the super cap…not sure that would help, their ESR can be very high.