grizedale
Advanced Member level 3
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I have been very keen for you to proove me wrong, and am still trying to help you to do so. -but its not really me, because these are simply the views of the vast majority of the LED lighting industry.
From your last post, i am unsure where we are at now, the original point was about uncompensated parallel operation in LEDs.
If we take, say for example's sake, the XLamp range of Cree:-
**broken link removed**
...which of the XLamp range, (or any other range of your choice) are OK for uncompensated parallel operation.?
Am i right that in some cases, you appear to be saying that you have a special formula which allows you to add very small resistance values to each series string of a parallel'd bank of LEDs, and that resistance value equalises the current very well?
You have made statements about statistical spread of Vf values within a batch, but cannot corroborate this from LED foundry official documentation.
You say that you are selling LEDs to people, and some of them are putting them in parallel, without compensation.............i am wondering if these people are paralleling them because they know no other way.
We all know that LEDs in parallel without equalisation is ok if you pay the LED foundry a fortune to make up paralleled LED modules like that.....but few companies can stay afloat and pay that kind of outlay.
From your last post, i am unsure where we are at now, the original point was about uncompensated parallel operation in LEDs.
If we take, say for example's sake, the XLamp range of Cree:-
**broken link removed**
...which of the XLamp range, (or any other range of your choice) are OK for uncompensated parallel operation.?
Am i right that in some cases, you appear to be saying that you have a special formula which allows you to add very small resistance values to each series string of a parallel'd bank of LEDs, and that resistance value equalises the current very well?
You have made statements about statistical spread of Vf values within a batch, but cannot corroborate this from LED foundry official documentation.
You say that you are selling LEDs to people, and some of them are putting them in parallel, without compensation.............i am wondering if these people are paralleling them because they know no other way.
We all know that LEDs in parallel without equalisation is ok if you pay the LED foundry a fortune to make up paralleled LED modules like that.....but few companies can stay afloat and pay that kind of outlay.