IEC 62317-13-2015 pdf download.Ferrite cores – Dimensions – Part 13: PQ-cores for use in power supply applications.
This part of IEC 6231 7 specifies the dimensions that are of importance for mechanical interchangeability for a preferred range of PQ-cores and low-profile PQI-cores made of ferrite, and the locations of their terminal pins on a 2,54 mm printed wiring grid in relation to the base outlines of the cores.
The selection of core sizes for this standard is based on the philosophy of including those sizes which are industrial standards, either by inclusion in a national standard, or by broad- based use in industry. NOTE See IEC 6231 7-1 for more detail concerning the philosophy of selecting core sizes to be included. The general considerations that the design of this range of cores is based upon are given in Annex A.
2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. Void.
3 Primary standards
3.1 General Compliance with the following requirements ensures mechanical interchangeability of complete assemblies and wound coil formers.
3.2 Dimensions of PQ-cores
3.2.1 Principal dimensions The principal dimensions of PQ-cores shall be as given in Table 1 and those of the low-profile PQ-cores shall be as given in Table 2. See also Figure 1 and Figure 2. The dimensions of the cores may be checked by means of gauges. By way of example, a possible standard for these gauges is given in Annex B, although no relaxation of the requirements for the dimensions of the cores given in Table 1 and in Table 2 is permitted.
3.2.2 Effective parameter and A min values The effective parameter values for cores having the dimensions given in 3.2.1 are as shown in Table 3 and Table 4.
3.3 Dimensions limits for coil formers
The essential dimensions of coil formers suitable for use with a pair of PQ-cores shall be as
given in Table 5. See also Figure 3.
3.4 Pin locations and base outlines
These shall be as shown in Figure 4.
3.5 Pin diameter
Coil former terminations (pins) shall be accepted by a gauge having 1 ,2 mm holes on a true position.
4 Mounting
Due to their sizes and respective weights, it is recommended that the cores above PQ 35/35 (including PQ 35/35) be fixed on the printed board with mounting assemblies at two opposite sides of their coil formers.
Concerning low-profile PQ-cores, no mounting assemblies are defined. It is recommended that the two cores be fixed by glue or adhesive tape.IEC 62317-13 pdf download.