help whith a low voltage dc/dc converter schematic

adi109cj · 6th February 2008, 10:32 AM

I need a schematic for a low voltage input dc/dc converter to power an 1W white LED from an 1,2V NI-MH cell.
Thanks

dhaen · 6th February 2008, 10:34 AM

Check the Elektor magazine website. A couple of months ago a colleague brought in a 3-pin device that did it all, and was free with the magazine.

jackinnj · 6th February 2008, 12:12 PM

Linear Technology described a very low voltage DC-DC converter using NFet and PFet synchronous rectifiers -- the LTC3490. TI has the TPS61020 which has even lower min V(in). The TI part is around $3.15 in singles.

6th February 2008, 10:32 AM	#1
adi109cj diyAudio Member Join Date: Mar 2006 Location: Cluj-Napoca Romania	help whith a low voltage dc/dc converter schematic I need a schematic for a low voltage input dc/dc converter to power an 1W white LED from an 1,2V NI-MH cell. Thanks

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6th February 2008, 10:34 AM	#2
dhaen diyAudio Moderator Emeritus Join Date: Jun 2002 Location: U.K.	Check the Elektor magazine website. A couple of months ago a colleague brought in a 3-pin device that did it all, and was free with the magazine.

6th February 2008, 12:12 PM	#3
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	Linear Technology described a very low voltage DC-DC converter using NFet and PFet synchronous rectifiers -- the LTC3490. TI has the TPS61020 which has even lower min V(in). The TI part is around $3.15 in singles.