More New Cree Goodness coming....

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Mike C
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Maybe I’m not so good at reflowing, but these XHP50.3 HI 4500K 90CRI LEDs seem to be rather fragile when it comes to current. I went just above the limit on two of them at 12V and they burned out rather quickly. My heat sinking was probably not adequate either but for now I I’ll give up on these until someone who knows what they are doing does a more thorough test.

everydaysurvivalgear
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I got a 6v XHP50.3 HI doing 4k lumens I think the current draw is like 8-9 amps it’s okay but I’ve only used it for testing. I tried to reflow one and the dome melted.

Mike C
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everydaysurvivalgear wrote:
I got a 6v XHP50.3 HI doing 4k lumens I think the current draw is like 8-9 amps it’s okay but I’ve only used it for testing. I tried to reflow one and the dome melted.

Must be my crappy reflowing… I should stop buying bare LEDs and only get mounted to MCPCBs by people who know what they are doing.

I re-configured my driver for 6V and put in a MT-G2 instead, those things take a lot of abuse.

svitlo
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Soldering the XHP70.3 LED on a copper substrate DTP.

svitlo
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SKV89 wrote:
svitlo wrote:
For those who love warm XHP50.3 HI 3000K, XHP70.3 4000K 90CRI available here

Too bad we don’t know what the tint is like. If we know for sure it has rosy good tint, I would buy.

I can check with a spectrophotometer. If you are interested.

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svitlo wrote:
I can check with a spectrophotometer. If you are interested.
 

 

Svitlo, are you the owner of Beriledz? Smile

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Always fun to see someone else’s reflows and tricks, thanks for making the video. Thumbs Up Smile
A spectrometer test would be nice, I always prefer (also) a measurement with a reflector on the led and measuring in the hotspot of the beam.

thefreeman
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Colorimetry results would be welcomed indeed, and like Djozz said, a real world measurement is preferable, especially not a bare LED measurement with the device right above it.
Something like a spot/corona/spill measurement with a reflector like this doesn’t take too long to do and is quite informative about the LED.

merlot
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svitlo wrote:
SKV89 wrote:
svitlo wrote:
For those who love warm XHP50.3 HI 3000K, XHP70.3 4000K 90CRI available here

Too bad we don’t know what the tint is like. If we know for sure it has rosy good tint, I would buy.

I can check with a spectrophotometer. If you are interested.

Yes please!

story
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Hey where can I buy the 4500k ones? I searched AE, Kai, Google. Anywhere else I should be searching?

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story wrote:
Hey where can I buy the 4500k ones? I searched AE, Kai, Google. Anywhere else I should be searching?

The XHP50.3 HI 90CRI ? Here

They also have a HD version (80CRI) : Link

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Digikey has domed version in 4500K and 90cri.

They have 26 different XHP50.3’s in 90cri on stock, so pick your poison.

story
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Thanks, I will spend some time there.

pro22000
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Bought recently the following device for reflowing: https://www.aliexpress.com/item/1005003152742159.html?spm=a2g0o.9042311.....
So far it works fine.

djozz
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pro22000 wrote:
Bought recently the following device for reflowing: https://www.aliexpress.com/item/1005003152742159.html?spm=a2g0o.9042311.....
So far it works fine.

Interesting thing for a great price.seems like the temp-regulation feedback is completely done inside the heater itself, a simple mechanical bi-metal thermostat? The 260 degrees is a bit high for reflows with simple 63/37 Pb/Sn solder, more appropriate for the higher temp solders.
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djozz wrote:
pro22000 wrote:
Bought recently the following device for reflowing: https://www.aliexpress.com/item/1005003152742159.html?spm=a2g0o.9042311..... So far it works fine.
Interesting thing for a great price.seems like the temp-regulation feedback is completely done inside the heater itself, a simple mechanical bi-metal thermostat? The 260 degrees is a bit high for reflows with simple 63/37 Pb/Sn solder, more appropriate for the higher temp solders.

This looks very useful. I noticed there is an option to purchase with US plug, but the voltage states 220V. US wall outlets operate @ 120V. Do you know if it will operate at 120V and still reach full temperature?

Thanks

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FlashPilot wrote:
djozz wrote:
pro22000 wrote:
Bought recently the following device for reflowing: https://www.aliexpress.com/item/1005003152742159.html?spm=a2g0o.9042311..... So far it works fine.
Interesting thing for a great price.seems like the temp-regulation feedback is completely done inside the heater itself, a simple mechanical bi-metal thermostat? The 260 degrees is a bit high for reflows with simple 63/37 Pb/Sn solder, more appropriate for the higher temp solders.

This looks very useful. I noticed there is an option to purchase with US plug, but the voltage states 220V. US wall outlets operate @ 120V. Do you know if it will operate at 120V and still reach full temperature?

Thanks

I want to say yes, but I suppose confirmation is needed about the exact heater used in this one. These are ok, if you get one that a) works and b) lasts, and if you inspect/mod it for safety upon receipt. I got this similar one on Amazon awhile back and used it a number of times…nice that it includes some silicone foot covers where most don’t. The price has gone up to $16 but it might be worth it for easy returns if needed. They get hot fast and are hot enough to be at the max acceptable for robust white emitters so paste on prepped components is best, and work fast, be ready to remove pretty quickly for cooling. I put a small block of 1/4” 6061 on mine in an attempt to slow down the rate of heating and that worked better. The power cord is chintzy and needs support (strain relief but also so you don’t dump the works with a shift in leverage).

https://www.amazon.com/gp/product/B07W1ZZH8T/

But…around the holidays Sainsmart had a good coupon and I bought one of their super nifty little heaters. It is Small, but perfect for led boards! It’s programmable and has presets, wider range of temperatures, and something that approaches a good proper curve for preheating. It really works great and I think it was worth the cost. Actually extremely well made and constructed, with a very simply removable heat plate/heater if that’s ever necessary (or maybe they’ll bring out a larger one?)…I was surprised with the quality, certainly commensurate with the pricing. Need a fairly beefy power supply for it – theirs is good quality and the combo seems to still be cheaper than what you can buy them for separately. These are on Amazon as well if you google the model number – didn’t look just now but three times I checked they had the better price on their direct website (shipping is free for this amount).

https://www.sainsmart.com/collections/soldering/products/miniware-60w-mi...

vestureofblood
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Has anybody found 50.3 HI in 3 volt yet?

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thefreeman
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vestureofblood wrote:
Has anybody found 50.3 HI in 3 volt yet?

According to the datasheet it doesn’t exist.

fogofwar
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thefreeman wrote:
vestureofblood wrote:
Has anybody found 50.3 HI in 3 volt yet?

According to the datasheet it doesn’t exist.

https://cree-led.com/media/documents/ds-XHP50-3.pdf

There is a graph showing 3V XHP 50.3 HI (Page 23), but no retailer seems to have it yet. Once it comes out, I’m going to bug Mateminco to put four of them in a MT04. This would be my ultimate night walk light.

thefreeman
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It sounds more probable to me that they forgot that there is no 3V HI when copy pasting the chromacity shift graphs (they’re identical), than forgetting to list the 3V HI models.

story
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FlashPilot wrote:
djozz wrote:
pro22000 wrote:
Bought recently the following device for reflowing: https://www.aliexpress.com/item/1005003152742159.html?spm=a2g0o.9042311..... So far it works fine.
Interesting thing for a great price.seems like the temp-regulation feedback is completely done inside the heater itself, a simple mechanical bi-metal thermostat? The 260 degrees is a bit high for reflows with simple 63/37 Pb/Sn solder, more appropriate for the higher temp solders.

This looks very useful. I noticed there is an option to purchase with US plug, but the voltage states 220V. US wall outlets operate @ 120V. Do you know if it will operate at 120V and still reach full temperature?

Thanks

Yes. I have one working on 120v. Just takes longer than 20 seconds as advertised.

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FlashPilot
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Correllux and Story,

Thanks for your comments on the reflowing plate(s). Ive been heating a plate of aluminum over a glass top stove for my reflow plate and this will simplify life. Ordered…

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Looks like Digikey has the domed 70.3s (XHP70D-00) in stock, including 90 CRI versions. Would be interesting to see some tests of those.

No sign of the XHP70.3 HI (XHP70D-H0) anywhere, though. Definitely looking forward to the 90 CRI versions of that one. Mouser claims to have an ETA of April 8, but no idea how accurate that is.

sergx
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Hey guys. Has anyone been able to find out if we will have different options with xhp50.3 hi 3v? I mean 80+ cri/warm light. I met information that it only works in the 6 volt version. Hope this is a mistake.

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sergx wrote:
Hey guys. Has anyone been able to find out if we will have different options with xhp50.3 hi 3v? I mean 80+ cri/warm light. I met information that it only works in the 6 volt version. Hope this is a mistake.

Interested in this too.

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Proper razor dedoming of an HD version will create the same thing, so you have all of the options available if you look at it that way.

Mark M
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A few high CRI 5000k XHP 70.3 HI in-stock at cutter

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