# Need help selecting a LED Driver

#### Christopher Vaillancourt

Jun 16, 2015
1
I have 50 3W LED's that need 700ma of current each and there voltage is 3 to 3.6V. I know I want to use a constant currant driver with close to 700ma of current output but the problem i'm having is all the drivers at that level have an output voltage of like 9-36V. So from my understanding is that if i put enough in series to get the the 9 volt minimum the current per would be very low. I also dont think i could put them in parallel alone because it wouldn't be able to regulate down low enough for each led. I could be wrong on some or all of my understanding of this so any help would be great thanks.

#### Martaine2005

May 12, 2015
4,949
I have 50 3W LED's that need 700ma of current each and there voltage is 3 to 3.6V. I know I want to use a constant currant driver with close to 700ma of current output but the problem i'm having is all the drivers at that level have an output voltage of like 9-36V. So from my understanding is that if i put enough in series to get the the 9 volt minimum the current per would be very low. I also dont think i could put them in parallel alone because it wouldn't be able to regulate down low enough for each led. I could be wrong on some or all of my understanding of this so any help would be great thanks.

My friend. This forum has a dedicated resource section for all led questions.
You will not find any other forum that explains the basics right through to complex calculations.
Head over to the link below and be prepared to be blown away.

Martin

#### cjdelphi

Oct 26, 2011
1,166
How many square dies are on your "3w" led? Take a 10w (3x3) each die handles roughly 1w, if you have 1 square and not 3 of them i doubt it's 3w..

cree's make 5w single dies, only 3watt ones i've seen have 3 sections..

Oct 26, 2011
1,166
These?

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#### (*steve*)

##### ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,510
I would advise the op to look at what drivers are available with a 700 mA output and to arrange the LEDs to suit.

#### Edwardw35

Jun 16, 2015
21
ELT 60W, 700mA, IP20 driver

#### Colin Mitchell

Aug 31, 2014
1,416
Do you want to drive all of them in series at the same time?

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Robert Monsen
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