DC to DC converter circuit from input voltage 15 … 30V DC output 9v …. But the author has tested over adjustable from 26V 12v 1 amp power stably able to provide a total of two channels of power... Electronics Projects, DC to DC Converter Circuit UCC37324 SG3524 "dc dc converter circuit, power electronic projects, sg3524 circuit, " Date 2014/06/21