Perhaps you should try some spelling variations:
lcc converter » dcdc converter, ac converter, luo converter
llc converter » ac converter, luo converter, c converter
pfc converter » ac converter, sepic converter, buck converter
lc converter » ac converter, c converter, ld converter

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((lcc converter) OR (dc converter))) OR (((((llc converter) OR (pfc converter))) OR (lc converter)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((lcc converter) or (dc converter))) or (((((llc converter) OR (pfc converter))) or (lc converter))))".
• Adding a wildcard symbol may retrieve word variants: ((((lcc converter) or (dc converter))) or (((((llc converter) OR (pfc converter))) or (lc converter))))*.