Trying JLCPCB for 200A 6kW LED pulser

Winfield Hill · 2019-12-23T02:31:43+00:00

3x.19_200A-45ns_LED-pulse.pdf previously posted on DropBox. Refining the design. Having finished a proto PCB output-stage for our 200A 6kW LED blaster, and with the project's power engineer, Rob Legg, off for a Christmas break, I was eager to get PCBs made. I reasoned a Chinese PCB house would work through Christmas. Inspired by J.L., I tried ALLPCB. Smooth website, but a SUBMIT button freeze-up. JLCPCB also proclaimed fast production and fast DHL delivery, in under a week. It was a little disconcerting to get a Dear WinnieldHill order confirmation email, but hey, there's a new spelling for my name. Haha, ordered 15 boards, total cost with shipping, only $31, that's $2 per board. It's an incomplete prototype, but still useful for playing around at full power. R.Legg burned out a few $150 LEDs, with long pulses, at my request, but now has other parts on hand for the next round. Anyone else wants to join the fun, I can send you blank RIS-796_1 prototype PCBs. -- Thanks, - Win

Dec 23, 2019 22 Replies

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John Larkin 6 years ago

VCSELS don't seem to gain-switch well. DFBs seem to be better.

John Larkin Highland Technology, Inc trk jlarkin att highlandtechnology dott com http://www.highlandtechnology.com

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Phil Hobbs 6 years ago

The self-pulsing trick depends on the constants in the rate equations, which govern the population inversion, optical gain, and circulating optical power. VCSELs have very short cavities, so their optical build-up time is also short, so their behaviour is more nearly first-order. (Or something like that.) ;)

Cheers

Phil Hobbs

Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com

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John Larkin 6 years ago

Not bad for 1 AM!

My guy Jonathan has a lot of experience teasing out clean g-s pulses. You might email him if you want to play with this.

We have a couple of drivers that work well for this, too.

John Larkin Highland Technology, Inc trk jlarkin att highlandtechnology dott com http://www.highlandtechnology.com

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