apologies for the newbie question, enjoyed my first build from this site, trying to understand pairing of drivers to strips now...
looking at these drivers....
https://www.digikey.ca/product-detail/e ... ND/4332671
would I be able to pair one, with 4 of these?
https://www.digikey.ca/product-detail/e ... ND/7907663
Utilizing 75W Thomas Research driver
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rubegoldberg2
- LED-Curious
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just to make sure I understand the math....... in most cases with strip builds, i'm looking to fit strips in the voltage range, and then squeeze a reasonable amount within amount of current available? (with constant current drivers)
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unkle_psycho
- LED Wizard
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For these strips TRP have two interesting drivers. The one you are looking at will give 60w @20v. There's another 40w 22v driver that costs around 6e. it's about 4x smaller and lighter.
The 75w driver is 88% efficient and the 40w driver is 86% efficient.
With minor heatsinking I usually drive 2 strips with the 40w driver, or 3 with the 75w driver, thats driving the strips 70% of max with minor heatsinking.
The 40w driver with 3 strips, and the 75w driver with 4 strips will be soft enough to run without heatsinks. Even driving two strips with the 75w driver, @1500mA, with minor heatsinking would not lead to catastrophic failure. Just be less efficient.
The 75w driver is 88% efficient and the 40w driver is 86% efficient.
With minor heatsinking I usually drive 2 strips with the 40w driver, or 3 with the 75w driver, thats driving the strips 70% of max with minor heatsinking.
The 40w driver with 3 strips, and the 75w driver with 4 strips will be soft enough to run without heatsinks. Even driving two strips with the 75w driver, @1500mA, with minor heatsinking would not lead to catastrophic failure. Just be less efficient.
"Nothing is true, everything is permitted"
Yup, that's more or less the process.just to make sure I understand the math....... in most cases with strip builds, i'm looking to fit strips in the voltage range, and then squeeze a reasonable amount within amount of current available? (with constant current drivers)
With CV drivers it's kind of the opposite, pick a current you want, then figure out the volts.
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rubegoldberg2
- LED-Curious
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Shimbob wrote: ↑Fri Sep 27, 2019 3:32 pmYup, that's more or less the process.just to make sure I understand the math....... in most cases with strip builds, i'm looking to fit strips in the voltage range, and then squeeze a reasonable amount within amount of current available? (with constant current drivers)
With CV drivers it's kind of the opposite, pick a current you want, then figure out the volts.
in that case, how does the rated amperage fit into that?
looking at these 2.
First one has an output amperage max of 4
https://www.digikey.ca/product-detail/e ... ND/5597296
Second one has max amperage of 1.4
https://www.digikey.ca/product-detail/e ... ND/5597300
if i pair appropriate voltage rating LEDs within the wattage allotment, does the different max amperage rating have any implications?
8-24V 4A, so only one strip in series required to match the voltage. 4A will make the magic smoke escape, so at least 3 in parallel to bring the current under 1.4A, but preferably more.First one has an output amperage max of 4
https://www.digikey.ca/product-detail/e ... ND/5597296
23-69V, 1.4A, so 3 strips in series fits the voltage, but preferably at least two parallel to not be at max current.Second one has max amperage of 1.4
https://www.digikey.ca/product-detail/e ... ND/5597300