ArtieT59
November 30, 2021, 4:41pm
21
mattlward:
My guess is a poor reflow… That aside, some drivers will fail if powered up with no load connected to them. So, if half of the led was connected and over currented and failed, this would lead to a driver with no load connected. Maybe the cause of the driver failure, if it indeed failed.
i think your right, Matt. The reflow was probably insufficient, not enough solder. Thanks!
JaredM
November 30, 2021, 4:53pm
22
ArtieT59:
One question- if the led has a “split” pad layout but I soldered it into a mcpcb with a “standard” 3v like layout, would that of like “shorted” the led pads so they all “ran at the same time”, or so that the led got voltage to both of its 2s at the same time?
That’s ideally how it would work, but like I said, if too little solder was used and/or one of the four pads didn’t actually make a connection, then one of the two 2S strings would have been open circuit
Yes, that’s correct. ‘3V’ or non-split pcb would be 6V. The question is did you have one or two 6V strings being driven (bad reflow question).
ArtieT59
November 30, 2021, 6:06pm
23
JaredM:
ArtieT59:
One question- if the led has a “split” pad layout but I soldered it into a mcpcb with a “standard” 3v like layout, would that of like “shorted” the led pads so they all “ran at the same time”, or so that the led got voltage to both of its 2s at the same time?
That’s ideally how it would work, but like I said, if too little solder was used and/or one of the four pads didn’t actually make a connection, then one of the two 2S strings would have been open circuit
Yes, that’s correct. ‘3V’ or non-split pcb would be 6V. The question is did you have one or two 6V strings being driven (bad reflow question).
got it! Makes sense now. And probably had only one 6v string being driven, would sound right to me.
I will try to confirm if this is true, and if the driver I thought I had blew up, is actually blown up. Lol.