Hello all,
I just ordered a lot of these Chinese 3W Cool White high power LEDs straight from the manufacturer. Not only they're cheap, but they're reilable and color consistency is excellent.
Here, have a look at its die (or dies?>)
On careful observation, you see not one, not two, but a whooping 8 Bond wires on the substrate! I verified this by giving 2.00 V and each bond seems to have its own die!
The benefits are twofold, firstly, these dies are simple and easy to produce (I think these are the same dies with 5mm LEDs). And being in Parallel, I one die fails, other continue to function!:tinfoil:
Here's a closer peek using my cam's SuperMacro and some super advanced Macro lens-
Sorry, I don't have any scientific equipments to measure the light output and spectrum, but by personal analysis, they're BRIGHT!
atleast as bright as the Seoul p4 LEDs
Imagine that a just less than half the price!!!
One more thing i'm happy about is, very low vF.
They pull about 430mA just at 3.05V!
I hope to bring some beamshots tomorrow, stay tuned!
Update 1>
VF chart-
Voltage---------mA
2.99 370
3.01 460
3.20 690
3.33 700 (Sweet spot, and drives direct on PC SMPS 3.3v rail)
3.55 900
1> LED at very low power. We can see the dies glowing separately-
2> At Slightly more power, the glow gets more and more homogeneous-
Update 2.... Reserved for beamshots
I just ordered a lot of these Chinese 3W Cool White high power LEDs straight from the manufacturer. Not only they're cheap, but they're reilable and color consistency is excellent.
Here, have a look at its die (or dies?>)
On careful observation, you see not one, not two, but a whooping 8 Bond wires on the substrate! I verified this by giving 2.00 V and each bond seems to have its own die!
The benefits are twofold, firstly, these dies are simple and easy to produce (I think these are the same dies with 5mm LEDs). And being in Parallel, I one die fails, other continue to function!:tinfoil:
Here's a closer peek using my cam's SuperMacro and some super advanced Macro lens-
Sorry, I don't have any scientific equipments to measure the light output and spectrum, but by personal analysis, they're BRIGHT!
atleast as bright as the Seoul p4 LEDs
Imagine that a just less than half the price!!!
One more thing i'm happy about is, very low vF.
They pull about 430mA just at 3.05V!
I hope to bring some beamshots tomorrow, stay tuned!
Update 1>
VF chart-
Voltage---------mA
2.99 370
3.01 460
3.20 690
3.33 700 (Sweet spot, and drives direct on PC SMPS 3.3v rail)
3.55 900
1> LED at very low power. We can see the dies glowing separately-
2> At Slightly more power, the glow gets more and more homogeneous-
Update 2.... Reserved for beamshots
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