Do meanwell type b drivers go above max rating?

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NothinYet

Active Member
I've been wandering if the type b drivers go above the max rating. We know the a drivers do.

If so, is this located on the data sheet?

Is it the same overage as the a drivers?

If they do do they go over max. How is this achieved? With 100kohm pot turned to max? Or with 110kohm pot turned to max?

Does it depend on the tolerance of the driver you receive?

Does it depend if it's a CC or CV driver?

Thanks in advance for the info.
 
D

dbrn32

Active Member
I have a b driver that’s over, but barely like 10ma. I think there was some confusion in the early diy days as that information was passed around a lot, I’m even guilty of repeating it.

I think there was so few people building that we just weren’t sure. I just thought I wasn’t getting lucky lol. When I finally put an a model next to a b model it was a little more obvious.
 
jarvild

jarvild

Well-Known Member
240H- 24B pulls 267 watts from the wall DSCN0817.JPG
So with driver loss it's about 248 watts actual power output.
 
N

NothinYet

Active Member
CobKits said:
look at test reports. click on any driver model then select "reports" tab at the top

http://www.meanwell.com/product/led/LED.html




open dimmer circuit is the same as high resistance
Click to expand...
A 100kohm pot turned up to 100% is like having the wires open?

Or is this chart saying at 100kohms fully turned up you get 100%, and the driver needs to be fully open?

Sorry for noob questions. The CV charts doesn't have the open percentage for the b type drivers. Does this mean they don't go above max rating like the CC b versions?

Screenshot_2018-07-21-17-57-46.png
 
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N

NothinYet

Active Member
CobKits said:
no thats (about) 100K resistance. open = infinite resistance

if the data isnt there
youd have to try it
Click to expand...
I got it now. Except for the chart you posted. Is it saying 90k gives you 1.274a, 100k gives you 1.395a.

so would 108ohms give you the rest up to 1.452a, or is the 1.452a only possible with the open circuit?

Sorry for the questions if they sound stupid. I help people out a lot on ledgardner.com and this would be great to know.
 
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CobKits

CobKits

Well-Known Member
some datasheets show open, some dont

current at open circuit will always be either equal to or greater than current at100K

it might not be more, but it certainly wont be less

also keep in mind they are constantly revising both the product s and the datasheet, so no guarantee the datasheet matches the performance of an older product of same part number
 
N

NothinYet

Active Member
I get that complete max is open. Let me rephrase the questions lol.

The hlg-150h-20 says the specs are 4.5-7.5a. The test report shows 3.08-10.79. If I was to get the same exact driver they tested if it was a b version. Which situation would give me the extra 3.29a?

1. Dim wires open?
2. 100kohm pot?
3. Above 100kohm pot? (Like 110kohms, or 115kohms)
 
CobKits

CobKits

Well-Known Member
NothinYet said:
If I was to get the same exact driver they tested if it was a b version.
Click to expand...
thats almost certainly an A version. if you scroll down to the dimmer test you'll see the max they note is 7.767A/103.56%

id be surprised if that 10.79A is accurate, and if so, at what voltage. 45% over spec is not typical
 
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