LED driver selection and aluminium based PCB

[willpearce13]

I am currently manufacturing a high power LED garden light.

I am using OSRAM Golden Dragon LEDs alongside a 30W LED driver http://www.locksonline.com/acatalog/24v-15-or-30w-hd-led-driver-9096.html#spec

Does this setup seem feasable to you?

I am looking to solder some OSRAM Golden Dragon LEDs to an aluminium based PCB, but all the sites i have looked on require you to send your design and they manufacture it for you.

Here is a link to the LEDs i am using.
OSRAM Golden Dragon LED

I was wondering if it is possible to solder the LEDs to a normal FR4 PCB board then using a thermal epoxy, glue it to a thin sheet of aluminium to deal with the thermal management issues.

The Golden Dragon LEDs are supposed to be reflow soldered, but i don't see why they cant be soldered using a normal soldering iron, but i was wondering if the PCB board would be able to dissipate the heat through itself and onto the aluminium sheet to act as a heat sink. Or would the PCB board warp under the high temperature. (max temp of around 70 celcius/158 farenheit)

The PCB with the aluminium base can then be screwed onto a larger aluminium heatsink to take away the heat.

Any help would be great!

Thanks,

Will

 

[edroedro]

A standard FR4 board would act as an insulator between the LED and the aluminum.

You need to get a heat sink connected directly to the LED junction, which usually means custom circuit boards.

How are you making the FR4 board? If you are custom making it yourself, you can use copper or solder vias to connect the junction to a metal plane on the bottom of the board.

 

[willpearce13]

Well the FR4 board was just an idea. Would i be able to etch my circuit design onto this board as you would a normal PCB? http://uk.farnell.com/cif/aat10/pcb-aluminium-100x150/dp/4147984

If i was to use the FR4 i would be modding it myself, but what do you mean by using copper or solder vias to connect the LED to the metal? I am fairly new to this heat management!

Thanks,

Will

 

[HarryN]

Hi Will,

I might have an option for you on the MCB front.

Send me a pm.

Harry

edit I see you don't have enough posts yet for private messages. Instead, send an email to my user name at wirlnet dot com.

 

[willpearce13]

HarryN,

I tried to message you but it didnt work for some reason.

could you email me with the info you have please?



thanks a lot for your help!

Will

 

[HarryN]

Hi Will, I sent an email to you on the MCPCBs.

Private messages will not work for you yet, as you don't have ennough posts yet.

I suggest that you consider editing your post to remove your email now.

Take care,

Harry