SOLDER-FREE PRINTED CIRCUIT MOUNTABLE TRANSFORMER
Original Publication Date: 1984-Jun-01
Included in the Prior Art Database: 2005-Feb-04
Described is a printed circuit mountable transformer that requires no soldering during assembly or mounting. The transformer, as diagrammed in Figs. 1 and 2, is primarily intended for use in a high frequency (100 KHz to 500 KHz) switching power supply. A primary winding of insulated copper tape is wound on a molded plastic bobbin with leads exiting from the bobbin on the lower side. Each lead of the primary has a clearance hole to accept an eyelet which secures the lead ends to a header to provide primary terminals. If an electrostatic shield is needed, it is wound over the primary on the plastic bobbin and is terminated by a lead having a clearance hole which accepts an eyelet. The eyelet is used to secure the shield lead to the header at a position between the two primary terminals.