Any Strips that are 10-16fV?

[JavaCo]

How do you know it is fine did you put a amp meter on each string and measure? If you are running chips or boards all bought at the same time then they more then likely manufactured at the same time with the same batch of LEDs so they will have about the same forward voltage and will run fine in parallel. But you run chips with different forward voltages in parallel on separate strings the one with the higher forward voltage will hog more amps. Ohm's law. Only reason i say anything is he was talking about running strips that max out @ 700mA in two parallel strings if they dont match up he will be running one string over spec. But dont take my word on it here is a bridgelux engineer talking about current hogging

 

[CannaBruh]

This scenario of 'current hogging' seems to be edge case though valid concern on paper.

Has anyone seen this issue in practice or is this Bridgelux marketing how well they do at solving a problem that nobody on the bench is finding to be an issue? (disclaimer I do use Bridgelux strips)

FWIW I have many Chinese cheapo COBs that when ran in parallel have never indicated that one was running hotter than another (brightness) at least never enough to warrant putting meters in series with the branches and comparing the currents.

Perhaps best practices is to monitor currents to be certain you're within spec/limits when working with parallel branches.

 

[Airwalker16]

So

Have you observed this in practice? Is it possible that tolerances would be so loose that we'd see this kind of current loading from like parts on a parallel branch? I haven't witnessed this in practice and have done NO matching of emitters at all be it strips or COBs.

@Airwalker16 if you end up with two parallel branches, they don't need to make any additional electrical connection but at the DCV +/- inputs, they should make no connections between each other outside of the input voltages nodes.

So IF I were to split 2 parallel rows of 3 in series, that is the only way to get 700MA. Period. Right?

And what you're saying is I'd have the pos and neg lines split. Going in and then back out of the cob holders up to the third cob where the circuit ends. And the strips would be branched off a separate wire from the drivers outputs?
Like by using a 3 hole wago for both pos and neg? DC lead, lead to the cobs, and a lead to the strips?

 

[welight]

The new 5050 strips will be available in 12/24/36 and 48 volt. One of the benefits of this chip is it comes in a wide range of voltages

 

[Airwalker16]

So

The new 5050 strips will be available in 12/24/36 and 48 volt. One of the benefits of this chip is it comes in a wide range of voltages

If you could do a strip that ran really well at 1400MA and 36 v it'd be perfect.

 

[Airwalker16]

Actually 12v and 1400mA would be better so I could use 3 of them and spread them out.

 

[CannaBruh]

So

So IF I were to split 2 parallel rows of 3 in series, that is the only way to get 700MA. Period. Right?

And what you're saying is I'd have the pos and neg lines split. Going in and then back out of the cob holders up to the third cob where the circuit ends. And the strips would be branched off a separate wire to the strips?
Like by using a 3 hole wago for both pos and neg? DC lead, lead to the cobs, and a lead to the strips?

For the sake of wiring, treat the network of LED strips as a 4th COB in your 3 COB series.

Your network of LED strips needs to meet the headroom we talked about earlier that was still available with your driver.

The 700mA assumes the max current splits equally, as shown in the video @JavaCo shares we can come up with scenarios where this isn't true, thus one branch could have more current, which in your case where 700mA is MAX is not ideal and could shorten life or outright destroy devices.

 

[Airwalker16]

For the sake of wiring, treat the network of LED strips as a 4th COB in your 3 COB series.

Your network of LED strips needs to meet the headroom we talked about earlier that was still available with your driver.

The 700mA assumes the max current splits equally, as shown in the video @JavaCo shares we can come up with scenarios where this isn't true, thus one branch could have more current, which in your case where 700mA is MAX is not ideal and could shorten life or outright destroy devices.

So could you answer my question? I'm just confused now as to what you're saying now compared to before.

 

[CannaBruh]

@Airwalker16 Draw up your configuration and note the voltage drops and currents through branches. Basically do a quick DC analysis (you mofos should be doing this anyway if you're making lights)

All the figures we've been talking about assumes that the parallel branches will divide current evenly, an ideal scenario, and for those scenarios nothing changes. At max each branch would get 700mA (per your specification)

 

[Airwalker16]

So ya, like I thought. Obviously if I used cutters boards at 12v 1400MA current, I'd just add 3 on to the series as if it were another cob.
But if I used the 10v q series, I'd do the same thing, but would have 2 rows of them split from the outputs. I just wish there was a way to split the current without having to have 6 cobs for it

@Airwalker16 Draw up your configuration and note the voltage drops and currents through branches. Basically do a quick DC analysis (you mofos should be doing this anyway if you're making lights)

All the figures we've been talking about assumes that the parallel branches will divide current evenly, an ideal scenario, and for those scenarios nothing changes. At max each branch would get 700mA (per your specification)

 

[CannaBruh]

It might be best to mock up your ideal situation, then try to fit the numbers. I don't know the scope of your goal as it is.

What's stopping you from doing with the 10V strips what you would with the 12V strips? If they can take the current present in that series circuit I think you should be ok. Thoughts anyone?

 

[Airwalker16]

It might be best to mock up your ideal situation, then try to fit the numbers. I don't know the scope of your goal as it is.

What's stopping you from doing with the 10V strips what you would with the 12V strips? If they can take the current present in that series circuit I think you should be ok. Thoughts anyone?

Because the 10v strips are maxed at 1amp and are ran nominally at 700 milliamps.

 

[CannaBruh]

Because the 10v strips are maxed at 1amp and are ran nominally at 700 milliamps.

Without a diagram it's hard to follow.
I thought you were running 2 branches @ 700mA? Is that not the case?

 

[Airwalker16]

Without a diagram it's hard to follow.
I thought you were running 2 branches @ 700mA? Is that not the case?

No. I'm saying to get to 700mA, a current that strips can handle, I'd have to do parallel strings of 3 otherwise it'd be 1400.