DC-DC Buck Converter?

M

metic

Well-Known Member
Hi there rollitup,

I was just wondering if a meanwell DC-DC buck converter can be used in a constant current application, I currently have 2 x "vero29 SE" connected to a meanwell HLG-240-C1400 power supply.

With this current setup the power supply is not using the maximum amount of voltage for the circuit as it can go all the way up to 171VDC, with the 2x "vero29 SE" only drawing approx. 69-70v each at 1400ma.

What im wondering is can I make use of these spare volts, by adding a DC-DC buck converter to step down the current to 300ma, to power 2 PC fans for better thermal management?

is it safe to use a DC-DC buck converter with this Meanwell HLG-240-c1400?

or are these DC-DC converters generally used for the constant voltage style drivers?

thanks for the help guys!
 
Rocket Soul

Rocket Soul

Well-Known Member
welight said:
The max input on LDD is 56V, however as these are already constant current drivers they wont work being driven by cc source you need cv source
Click to expand...
Hey Mark, maybe you knowww the answer:
Whats the maximum output/wattage on a ldd driver or similar working dc/dc driver?
Lets say i have 350w /48V driver as base running my whites in parallel but i also wanna run a 48V/1400mA LDD for aprox 70w of red supplementation; is there a solutionn for this, which is economic, dimmable wireless and not too inefficient? If 70w is too much, how high could i get with this type of setup? I do understand that the ldds are a bit wattage limited due to size, are there dc-dc drivers that could higher wattage?

Ty
 
P

PurpleBuz

Well-Known Member
Rocket Soul said:
Whats the maximum output/wattage on a ldd driver or similar working dc/dc driver?
Lets say i have 350w /48V driver as base running my whites in parallel but i also wanna run a 48V/1400mA LDD f
Ty
Click to expand...
with the 350w 48V base driver, the LDD max Vf is ~45V (input voltage minus 3), 45 x 1.4 A = 63 watts.
 
1

1212ham

Well-Known Member
metic said:
Hi there rollitup,

I was just wondering if a meanwell DC-DC buck converter can be used in a constant current application, I currently have 2 x "vero29 SE" connected to a meanwell HLG-240-C1400 power supply.

With this current setup the power supply is not using the maximum amount of voltage for the circuit as it can go all the way up to 171VDC, with the 2x "vero29 SE" only drawing approx. 69-70v each at 1400ma.

What im wondering is can I make use of these spare volts, by adding a DC-DC buck converter to step down the current to 300ma, to power 2 PC fans for better thermal management?

is it safe to use a DC-DC buck converter with this Meanwell HLG-240-c1400?

or are these DC-DC converters generally used for the constant voltage style drivers?

thanks for the help guys!
Click to expand...
I just use a 12v wall warts for fans, a buck converter that can take a high input voltage will probably cost more than it's worth. I used a little ebay buck converter to run the fan on a cob, but it's only a 36v driver and COB.
 
welight

welight

Well-Known Member
Rocket Soul said:
Hey Mark, maybe you knowww the answer:
Whats the maximum output/wattage on a ldd driver or similar working dc/dc driver?
Lets say i have 350w /48V driver as base running my whites in parallel but i also wanna run a 48V/1400mA LDD for aprox 70w of red supplementation; is there a solutionn for this, which is economic, dimmable wireless and not too inefficient? If 70w is too much, how high could i get with this type of setup? I do understand that the ldds are a bit wattage limited due to size, are there dc-dc drivers that could higher wattage?

Ty
Click to expand...
Hi Rocket
Yes the max output on LDD is 52V, so 1.4 amp unit gets you around the 70 watts, these are of course PWM dimmable so could work with any PWM based controller, ie Bluefish, Storm, Meshtek. There are bigger wattage solutions but they start to run into money. Taskled make some really nice chunky drivers, hyperboost will run to 250 watts
H6 runs to around 150watt
Cheers
Mark
 
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