peltier driver

[badger1666]

anyone know where i can find a driver for peltier cooler or a schimatic (excuse spelling) i want to drive 4 mini 17w peltiers

[Zoof]

anyone know where i can find a driver for peltier cooler or a schimatic (excuse spelling) i want to drive 4 mini 17w peltiers

Are you planning a quadruple red?
some time ago I was looking into it, I found it not an easy accessible area. Maybe these bookmarks are of use:
http://www.maxim-ic.com/appnotes.cfm...ber/3318/ln/en

http://www.tetech.com/FAQ-Technical-Information.html

look under `peltier-elementen':
http://elektronicaonline.allepaginas.nl/

[badger1666]

i got past the planning to build one, http://www.photonlexicon.com/forums/...ead.php?t=4688

i want to put a mini peltier on top of each one rather than cool the main plate as thermal conductivity from the lasers to the plate is not very good due to havingti innsulate the lasers from ground to use robins drivers
thanks for the info

[steve-o]

Badger, that's a great Avitar!

I hooked up a small peltier to about 1.5V at 230mA and it cooled right down pretty quick... no driver, just DC. Now If you want feedback, it'll get slightly more complicated.

[mixedgas]

Learned the hard way trying to stack three peltiers in series, dont place them across a PSU at their maximum ratings, use some sort of controlled current source, as in their performance curve the max ratings result in them backing off on their cooling and starting some self heating.
Woodward documents how to do drive them to their peak

Google: "stephen woodward and peltier and EDN"
three articles should come up.

one:
http://www.edn.com/index.asp?layout=...dustryid=47038

two:
http://www.edn.com/article/CA6505571...dustryid=44217

schematic from two:
http://www.edn.com/contents/images/6505571f2.pdf

I hope you need to thaw your fingers in a good way! Dont lick a cold peltier....
Steve
http://www.edn.com/contents/images/6505571f2.pdf

[loopee]

i got past the planning to build one, http://www.photonlexicon.com/forums/...ead.php?t=4688

i want to put a mini peltier on top of each one rather than cool the main plate as thermal conductivity from the lasers to the plate is not very good due to havingti innsulate the lasers from ground to use robins drivers
thanks for the info

Hey badger1666

The TEC should work as an insulator as both sides of a TEC are ceramic, so you should just be able to mount the LD mount directly onto the TEC and mount the assembly to the plate, this would also give additional benifit of a larger surface to distribute heat.

Troy

[Zoof]

i got past the planning to build one, http://www.photonlexicon.com/forums/...ead.php?t=4688

i want to put a mini peltier on top of each one rather than cool the main plate as thermal conductivity from the lasers to the plate is not very good due to havingti innsulate the lasers from ground to use robins drivers
thanks for the info

Nice going !
Which peltier elements did you get? I'm still in the `planning phase' of a double red. Got most of the parts though. But I didn't get past the 'peltier' planning stage So I'm looking forward to what you come up with!

[badger1666]

hi zoof
got them from http://www.greenweld.co.uk/acatalog/...eltier_76.html

the 17w 20mm one's

[sbk]

Anybody ever used the MAXIM 1978 IC? It looks good : http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3527

Single supply, +-3A output to the TEC, PID controller, monitoring outputs, all in one 48 pins package.

I made a peltier controller some times ago for my dual Maxyz red, it was working but was not very stable, and heated a lot. Unfortunately it died some days ago, so I have to make a new one.
But I can't find these MAXIM IC at a local electronic store... Maybe a group buy can be interesting? I think there's a min quantity to order at the web shop. It costs ~10$ for 1k units, we can certainly buy a lower quantity.

They also have an evaluation kit, but I can't found any price.

Also we can make an "open source" schematics with board layout, etc, so everybody here can use it...

[loopee]

Anybody ever used the MAXIM 1978 IC? It looks good : http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3527

Single supply, +-3A output to the TEC, PID controller, monitoring outputs, all in one 48 pins package.

I made a peltier controller some times ago for my dual Maxyz red, it was working but was not very stable, and heated a lot. Unfortunately it died some days ago, so I have to make a new one.
But I can't find these MAXIM IC at a local electronic store... Maybe a group buy can be interesting? I think there's a min quantity to order at the web shop. It costs ~10$ for 1k units, we can certainly buy a lower quantity.

They also have an evaluation kit, but I can't found any price.

Also we can make an "open source" schematics with board layout, etc, so everybody here can use it...

Maxim actually do free samples for a lot of there products, so you maybe able to get two samples for nothing.

Go to the ordering page for the device

http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3527/t/or

and there are two different samples you can order.