Led Drivers - 120v/230v - Whats more Efficient?

Hey guys, ive got some generic chinese drivers running some cxa's, they accept either 120 volt or 230 which is cool, how ever, im wondering if anyone knows if one or the other is more efficient or better?

I do like the idea that when running at 230, you are balancing your load on both legs of power.

Anyone else have any tips or advice? thanks.

For most drivers 240v gets the best efficiency. A percent, maybe 2 above 120v at full load.

The difference in efficiency is small. If you ever plan on expanding to use more than 15A, 240V would be better, otherwise it probably doesn't matter.

Ok cool, 240 it is then. thanks guys.

The differences in certain cases are NOT small....
It depends directly on the power of driver & at what level of max load is operating ..
The high quality HLG series ....
A fairly good example ...

40W


60W

80W


100W

120W

150W

185W

240W

320W

600W




Draw your conclusions ,
choose the LED devices to be used ,do the "power" math
and then you may consider,
about the exact connection & way that the LED devices are going to be driven ,
which driver (s) to use and at which AC voltage ...

Cheers.

that is quite something....thank you.

What is the explanation for the drop-off at the lower power of the lower watt curve for 277v.
It seem there is a significant slump around 30%?

And since they are dimmable, when they refer to "load" are they talking DC side voltage or current? I am assuming voltage unless there is some reason it could be otherwise.

SupraSPL said:

And since they are dimmable, when they refer to "load" are they talking DC side voltage or current? I am assuming voltage unless there is some reason it could be otherwise.

Click to expand...

Both ,actually ...

At DC side (output ) ,of course .
For example :
The HLP -60H-42 driver :

Max POWER Load = Max Io * Max Vo
( Then this particular driver works at Constant Voltage state )

max Power Load at CC Operation Mode = Max Vo ( for CC regulation ) * Io Max .

^^^
Nom. Max load at CV operation = 46 * 1.45 A = 66.7 W
Nom. Max Load at CC operation =42 * 1.45 = 60.9 W



^^^
Real Max Load At CC operation =48 *1.536 = 73,7 W
Real Max Load At CC operation = 42 * 1.536 = 64.5 W

Cheers.

Doer said:

that is quite something....thank you.

What is the explanation for the drop-off at the lower power of the lower watt curve for 277v.
It seem there is a significant slump around 30%?

Click to expand...

50Hz and 60Hz coil transients? Different threshold voltages for the SCs? Margins of error?