Simplest buck driver from 12V to 6V, 3A

[RusDyr]

Hi all.
I need in a driver with next parameters:
Uin = 9-28 V
Uout = 6 V
Iout = 200-3000 mA

It's driver for powering 2S2P XP-G with ability to dimming from full (1500mA) to min (100 mA):

As far as I understood, there are linear regulator or buck driver available.
I've found Addmteck page with drivers specifications for most popular AMC7135 and few other.
So the question is - what should I prefer?
8 x AMC7135?
4 x AMC7140?
2 x AMC7150?
2 x A718?
4 x A711?

I'm in trouble.

 

[AlexLED]

Hi RusDyr,

AMC7135 is not a good idea because Vin max is 6V.

I would suggest the TaskLED drivers:
http://www.taskled.com/hipflex.html
(Not simple nor cheap, though.)

...or this driver:
http://www.candlepowerforums.com/vb/showthread.php?t=201981
(Looks very good, too !)

Maybe you could use this driver:
http://www.dealextreme.com/details.dx/sku.26110~r.85749907
Not sure if you can get more than 1.1A out of one of those, you would need to use at least two, one for each of your parallel circuits.

Have a look at this list, maybe you can find others:
http://www.videofoundry.co.nz/ianman/laboratory/research/driverlist.php

 

[RusDyr]

HipFlex nice...but, IMHO, is a little bit overkill for my purpose.

...or this driver:
http://www.candlepowerforums.com/vb/...d.php?t=201981
(Looks very good, too !)

Input voltage is up to 20V, I need in up to 28V (for trucks etc).

Thanks for http://www.videofoundry.co.nz/ianman/laboratory/research/driverlist.php! It's nice.

But it's interesting, is there anybody who did driver at "my" regulators. Are they bad?