Hello,
I am looking for recommendation to design and build a LED/LASER driver.
It is to power a laser array for an upcoming project.
4 phases, 20V each @3A
So total of about 240W
The input voltage is a 8S lithium-ion battery pack: 22.4V~33.6V
The project budget is unlimited, I’m thinking of around $65usd/hr to design. Fixed project price is preferred.
Sounds like this could be a dc-ac drive inverter, in which case:
What’s the frequency of the output phases,
and the desired phase shift (90 degrees?)
Or,
it could be a dc-dc buck converter, with 4 output legs:
22-36V In: 20V Out (x 4)
Which type and How many of these devices are needed?
This is DC-DC
Yes, 4 outputs as you have typed out:
22-36V In, 20V Out (x 4)
I do want to control brightness, so we may need to PWM or adjust current.
I just need around 3~5 of these for my own testing.
Eventually, I will use a microcontroller to adjust outputs so it can account for over temperature.
What sort of duty cycle or run duration do you need?
Any sort of special precision or accuracy requirements?
s. @ desaluna , why you mucking around with adding links in quotes—not cool
When it is possible to put the array in series
it is maybe easier to find a driver.(with Poti)
Regards Xandre
My run duration regular flashlight, around 5~30minutes. I have active watercooling for the laser diode array, so the driver can be mounted to be cooled along too.
My only requirement is no overshooting of voltage during power on events. An overshoot of 0.20V = 0.5A increase.
Precision and accuracy of brightness is not important as this is just for general outdoor use.
The laser array is NUBM36 by Nichia. You can also find similar like nubm31t and nubm34
I have those drivers and in addition, all of the 200W 400W 800W 1200W stuff from ebay/amazon.
The issue with the driver from AliExpress, the input voltage is very narrow and not compatible with lithium battery pack’s varying voltage range.
The issue with the other drivers from ebay/amazon is that they overshoot and are very large. They are large because of the need of a dedicated heatsink. I want to design from scratch a driver that uses premium components, compact, and use a heat spreader for liquid cooling.
I currently use this driver and do 4P 1S, and also 2P 2S. It works fine, but the cost is ridiculous.
https://www.maimanelectronics.com/product-page/high-power-laser-diode-driver-oem-cw-15а-40v-sf6060
My budget for R&D is unlimited. Hence why I already have already tried so many drivers.
One of my personal goals is to eventually sell powerful flashlights, so the next step is to lower the unit cost.
I believe the Maiman SF6060 driver price is ridiculous to put in a consumer product.
I want to avoid the situation of Acebeam and sell the W50 for such a huge markup. I know the cost of the components they use.
I’m certain there will be no profit by selling for years, but this enables the ability to scale my hobby.
Spreading out the cost to develop driver, aspheric lens mold and polishing jig, wavien collar, etc.
Reminds me of this laser project by loneoceans Project 450 - A 7W Blue Laser Driver, maybe you can contact loneoceans but he isn’t on blf frequently these days.
Thank you for the recommendation! I have reached out to him and are in discussion.
I remember reading his posts/projects in awe sometime ago when I first started flashlight hobby!!
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