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Old 10-16-2011, 05:03 PM #1
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Default Anyone else notice that Nichia's 445 spec sheet got a power boost last month?

http://www.nichia.com/specification/.../NDB7875-E.pdf

Absolute Maximum Current: 1.7A
Optical Power Output: Min 1.1W Max 1.6W

Still under what we typically see, but not by much. A considerable improvement given that their datasheet used to state a max of 1W output.


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Old 10-16-2011, 05:07 PM #2
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Default Re: Anyone else notice that Nichia's 445 spec sheet got a power boost last month?

Are we sure that that is the right diode, it says 9.0mm in the spec sheet
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Old 10-16-2011, 05:11 PM #3
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Default Re: Anyone else notice that Nichia's 445 spec sheet got a power boost last month?

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Originally Posted by Jacob32123 View Post
Are we sure that that is the right diode, it says 9.0mm in the spec sheet
I believe most of the new 445 diodes being developed are a 9mm can.

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Old 10-16-2011, 05:12 PM #4
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Default Re: Anyone else notice that Nichia's 445 spec sheet got a power boost last month?

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Originally Posted by Jacob32123 View Post
Are we sure that that is the right diode, it says 9.0mm in the spec sheet
Nope, but it's the closest we have in terms of Nichia releasing a datasheet for our 445s. I think the presumption has been that it's the correct diode, but that KasEO had the 5.6mm case substituted (which I presume you can do when you're ordering 8 gajillion diodes at once)
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Old 10-17-2011, 04:14 PM #5
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Default Re: Anyone else notice that Nichia's 445 spec sheet got a power boost last month?

Very interesting, thanks for posting the link. I notice that this version does not have a case pin and has some sort of static protection built in.
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Old 10-17-2011, 05:16 PM #6
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Default Re: Anyone else notice that Nichia's 445 spec sheet got a power boost last month?

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Originally Posted by Garoq View Post
Very interesting, thanks for posting the link. I notice that this version does not have a case pin and has some sort of static protection built in.
Good eye!

Look at me, selectively paying attention only to power. What a rookie move!

Given that KasEO doesn't use the case pin, it wouldn't shock me to see our 445s lose this feature in the future.
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Old 10-17-2011, 05:16 PM #7
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Default Re: Anyone else notice that Nichia's 445 spec sheet got a power boost last month?

If these are rated higher than the 5.6mm we use, we can probably push them to 3W!
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Old 10-17-2011, 05:20 PM #8
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Default Re: Anyone else notice that Nichia's 445 spec sheet got a power boost last month?

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Originally Posted by blrock View Post
If these are rated higher than the 5.6mm we use, we can probably push them to 3W!
Good observation, unless these are basically the same as we currently use and they have realized over time that they can be pushed a bit harder.
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Old 10-17-2011, 05:30 PM #9
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Default Re: Anyone else notice that Nichia's 445 spec sheet got a power boost last month?

So either they updated their info on the diodes that we currently are using because of our experimenting with them OR they have a new really powerful 445 diode.
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Old 10-17-2011, 05:42 PM #10
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Default Re: Anyone else notice that Nichia's 445 spec sheet got a power boost last month?

Quote:
Originally Posted by jnhowett View Post
So either they updated their info on the diodes that we currently are using because of our experimenting with them OR they have a new really powerful 445 diode.
Seeing as they're claiming 1.6W optical output with 1.7A current, my guess is that they're essentially the same.
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Old 10-17-2011, 06:57 PM #11
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Default Re: Anyone else notice that Nichia's 445 spec sheet got a power boost last month?

After reading the OP I thought something sounded very familiar here. I just remembered I read a thread at PL about this very same diode. Here is a link so since there is no such thing as too much knowledge.
Any interest in 1,6W 445nm NDB7875 Nichia diode?
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Old 10-17-2011, 07:41 PM #12
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Default Re: Anyone else notice that Nichia's 445 spec sheet got a power boost last month?

9mm diode shouldn't be a problem. Pontiacg5 makes 9mm Aixiz replacement modules. We could use the existing heatsinks made for the standard Aixiz module.
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Old 10-17-2011, 07:53 PM #13
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Default Re: Anyone else notice that Nichia's 445 spec sheet got a power boost last month?

Yeah, price might still be bit of an issue.
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Old 10-18-2011, 07:19 PM #14
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Default Re: Anyone else notice that Nichia's 445 spec sheet got a power boost last month?

divergence seems to be even worse than 5.6mm ones
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Old 10-18-2011, 10:29 PM #15
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Default Re: Anyone else notice that Nichia's 445 spec sheet got a power boost last month?

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divergence seems to be even worse than 5.6mm ones
Actually, it's better.

The old ones were 12x40.

These new ones are 14x44.

IE, the ratio of divergence of one axis to the other is closer to 1.
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Old 10-19-2011, 05:20 AM #16
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Default Re: Anyone else notice that Nichia's 445 spec sheet got a power boost last month?

aaaah I see thanks for clarifying that
well but it's not much of a difference anyway

and with these prices for small quantities I think it's better to stick with
the current 5.6mm diodes
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