I have a project already built.
Look at related thread for details.
http://forum.allaboutcircuits.com/t...ts-of-small-leds-or-fewer-larger-leds.118425/
It is a LED light of 64 LEDs. It operates 12V / ~640ma. The current light is driven by a Luxdrive buck puck which works great. It regulates the current and provides 5V for the pic. It's only problem is they are a bit expensive. I want to have a backup and figure I could now build one myself.
I do want to build a pin compatible version so a LED driver with multiple but lower voltage and current outputs won't do.
I already have the 5V regulator handled with a LM2675-5. Very easy to use and low part count. I would like to find a similar buck chip to regulate the current to 640ma .
Any recommendations?
Bonus for
1. Also supplying 5V so I can use just one inductor.
2. It is adjustable with a trim pot.
3. It is through hole.
I do have some pt4115s on hand. Nice low part count but I they are fairly old technology and I purchased them from eBay so not sure how reliable they are. They do seem to work as I have already built a prototype. Plus the pt4115 is surface mount which is just a bit of a pain.
Look at related thread for details.
http://forum.allaboutcircuits.com/t...ts-of-small-leds-or-fewer-larger-leds.118425/
It is a LED light of 64 LEDs. It operates 12V / ~640ma. The current light is driven by a Luxdrive buck puck which works great. It regulates the current and provides 5V for the pic. It's only problem is they are a bit expensive. I want to have a backup and figure I could now build one myself.
I do want to build a pin compatible version so a LED driver with multiple but lower voltage and current outputs won't do.
I already have the 5V regulator handled with a LM2675-5. Very easy to use and low part count. I would like to find a similar buck chip to regulate the current to 640ma .
Any recommendations?
Bonus for
1. Also supplying 5V so I can use just one inductor.
2. It is adjustable with a trim pot.
3. It is through hole.
I do have some pt4115s on hand. Nice low part count but I they are fairly old technology and I purchased them from eBay so not sure how reliable they are. They do seem to work as I have already built a prototype. Plus the pt4115 is surface mount which is just a bit of a pain.
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