Problem with BDR-S06J 405nm diode

[kucito]

hello, I have this lovely diode and I made a build with it. The driver is OFL 74 from odicforce variable current boost driver 0-300mA+. I was driving it perfectly with batteries, but I tried using 4.5V DC adaptor with max output of 600ma. I knew diode could handle it even if the driver can't hold to 300ma.

The problem is that after running it with this power supply the diode is somehow weaker. It looks like 50mw beam. Still visible and producing heat and no change of the colour, but it is very weak. So I cannot determine if the driver is fucked or the diode is partially fucked I mean the diode is not fried if it still makes decent output and beam and everything.... It has decent heatsink, so it should hold on peak high power. (the whole think happened for second, no sparks, no shorts.....?

Any ideas?

Thanks

 

[daguin]

You may have produced what we refer to as a "zombie." It still "appears" OK, but will not go above a few mW, no matter how much power you give it.

The only real way to tell is to test your driver and diode separately.

Peace,
dave

 

[RA_pierce]

@Dave- can you not also test whether or not the diode is a "zombie" by the beam profile?
I've only seen one and the beam profile looked sort of like a creepy face.

 

[kucito]

You may have produced what we refer to as a "zombie." It still "appears" OK, but will not go above a few mW, no matter how much power you give it.

The only real way to tell is to test your driver and diode separately.

Peace,
dave

Hi, I guess I will buy a new driver or I will test it with test load which I don't have, but I can make. The beam is absolutely fine, it looks like a lower powered one. Still visible and fine colour. The profile is good, still clear circle with no distortions when it is unfocused.

 

[kucito]

@Dave- can you not also test whether or not the diode is a "zombie" by the beam profile?
I've only seen one and the beam profile looked sort of like a creepy face.

Well the beam is perfect. It looks exactly as it was before. Do you want some pictures? When it is focused it still cuts trough black tape easily but compared to before its really weak

 

[Elektrotechniker]

I had a 445nm diode take too much heat and the middle emmiter of the diode died. The diode emits light only from the edges. It looks very weaker at 1.25 A than a healthy 445 diode running at the same current. Looking at the beam profile is a good idea for a start Of course if it still emits from the center as well, it doesnt mean it is not damaged. I dunno I just think it's possible like RA_pierce said.

Apparently the driver is broken, since 600 mA is ok for a 12x diode,as you said.

 

[kucito]

Furthermore, when I am settled with this one (cause I am done with my red and green), even if the diode is fucked or the board, I will have some more questions about the power source and the the laws of Ohm, I will donate to the forum I really have never seen better forum with so much detailed information and tutorials.... It is definitely worth it to support it..

 

[kucito]

I had a 445nm diode take too much heat and the middle emmiter of the diode died. The diode emits light only from the edges. It looks very weaker at 1.25 A than a healthy 445 diode running at the same current. Looking at the beam profile is a good idea for a start Of course if it still emits from the center as well, it doesnt mean it is not damaged. I dunno I just think it's possible like RA_pierce said.

Apparently the driver is broken, since 600 mA is ok for a 12x diode,as you said.

Well there was no heat.... the only issue was that the power source was giving 4.5V with 600mA, but I thought the driver will limit them to 300....

 

[Elektrotechniker]

Well there was no heat.... the only issue was that the power source was giving 4.5V with 600mA, but I thought the driver will limit them to 300....

Seems the driode is okay then. im not 100% sure though, others know better than me. Well the only thing i can say is that, if the voltage output of your power source is greater than the driver input voltage, then the driver will get damage.

 

[kucito]

Seems the driode is okay then. im not 100% sure though, others know better than me. Well the only thing i can say is that, if the voltage output of your power source is greater than the driver input voltage, then the driver will get damage.

Sounds like that might be the case, I really hope its the damn driver, I don't wanna buy another 35 pounds diode. The driver though should take up to 6 volts, but the amps are product of when voltage meets the resistance, so I hope something on the driver is burned and no more than 300-500 amps went to the diode

 

[daguin]

@Dave- can you not also test whether or not the diode is a "zombie" by the beam profile?
I've only seen one and the beam profile looked sort of like a creepy face.

In my experience, not always

It might be even harder for an inexperienced eye to pick up the difference between a "zombie face" and simply an under-driven diode

Peace,
dave

 

[Flaminpyro]

300-500 amps

Sounds like that might be the case, I really hope its the damn driver, I don't wanna buy another 35 pounds diode. The driver though should take up to 6 volts, but the amps are product of when voltage meets the resistance, so I hope something on the driver is burned and no more than 300-500 amps went to the diode

 

[kucito]

300-500 amps

mili amps i forgot the m mA

 

[kucito]

I bought some resistors and diodes for test load. I will test the output first before going for another driver or diode. 1 ohm 2 watt resistor is perfect right?

 

[weeba2kv]

I think the DC adaptor did the damage.

 

[kucito]

I think the DC adaptor did the damage.

Yep, but damage to the driver or the diode, I am gonna make and try with test load and we'll see. Any suggestions how to power my stuff with this DC adaptor? It can do any voltage but the output is 600ma