Tracopower tdr 3wi series 3w dip dc dc converters tracopower tdr 3 1223wi the tracopower tdr 3wi series is a family of compact 3w dc dc converters with 41 input voltage ranges and tightly regulated output voltages even under no load conditions tracopower tdr 3 1223wi 3w dip dc dc converter 12v dc in 15v dc 100ma out