H Bridge Diagram - PL-2303 Edition USB to Serial Bridge Controller Product Datasheet Document Revision: 1.6 Document Release: April 26, 2005 Prolific Technology Inc.. Working Principle of Wireless Mobile Charger Circuit Diagram. Wireless Mobile Charger uses inductive coupling principle. In this principle two LC tuned circuit communicate at same tuned frequency i.e. tuned frequency of transmitter must be equal to tuned frequency of receiver. Here, we had use LC tuned to produce and transfer magnetic field which is received by another LC tuned circuit..