Hi Adam, I didn't think of the keyword module, only eval or demo. Thanks for the tip, Tony M. Adam Davis wrote: > Most of the eval modules are around $50, so if you're going that way > then you'll end up paying about that much. > > TI has a few parts in the area you're interested in, with $50 eval > modules available at digikey, TPS6104x, TPS6108x. Efficiency is about > the same, which is typical for this type of boost conversion. > > There are also a bunch of $15 TI boost converter modules, such as > http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=296-19682-ND > > Those that I've seen, such as the above module, only go up to 15V, but > if you pull the datasheet on the chip they are using you may find it > has additional range with few modifications. > > -Adam > > On Thu, Aug 20, 2009 at 9:04 AM, Tony Vandiver wrote: > >> Sorry, forgot the tag - >> >> I need a quick and dirty way to power an LED backlight that has typical specs of 16.5V and 40mA. My source is a LiPo battery that can be anywhere from 2.8 (discharged) to 4.2V (being charged) out. Ideally, I'd like to find a demo board (that I can get in house in a couple of days) that I can wire into my existing design for prototyping and presentation to a customer, and then adapt the demo design into the artwork after it's proven. (90% efficiency would be great, but not a must). I'd love to have a Microchip solution, but even they use a MIC2289 (Micrel) part on their LCD demo board to do this. I'd like to have a regulated current supply, but there is the possibility of outputting 18V or more from this switcher to a current regulator that I already have populated on the existing design - just decreases my overall efficiency that much more. This one has an adjustable output >> which is nice, but is kind of pricey at $50 each (I need 5 pieces - look at the bom - it's probably a 95% margin over materials) and only around 86% efficient at my point of interest : >> >> http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=LM2703EV-ND >> >> Thanks, >> >> Tony >> >> >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> >> > > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist