19/24

AN1523 APPLICATION NOTE

ANNEX 2 - Switch Mode Transformer Specification (continued)

SWITCH MODE TRANSFORMER SPECIFICATION

2362.0019 C

CUSTOMER CODE

ISSUE A

This document and its content are property of ELDOR CORPORATION S.p.A. No part of this document may be

reproduced, published, disclosed or used in any form with out written permission of ELDOR CORPORATION S.p.A.

DOC.N.

PAG. 2 / 6

1.0

GENERAL INFORMATION

1.1

Description

The magnetic circuit comprises two soft ferrite E-cores glued together and gapped on the central leg.

The windings are placed concentrically on single plastic bobbin made in self extinguish material.

The transformer comply with the standard (Refer to pharagraf “3.0 SAFETY”) for the component connected to the

mains because:

the use of triple insulation wire (three different layers) for the secondary winding.

the thickness of insulation that exceed 0.40 mm.

the shape of coilformer that maintain the safety creeping distance from the core , that is consired

belong the primary side, and the secondary output pins and the circuit components.

Winding outputs are made through 8 pins placed in two parallel rows (Refer to page 6).

1.2

Application

The transformer is designed for use in a switch mode flyback power supply.

1.2.1

Operating conditions

Operating ambient temperature:

0

°C to +60°C

Operating humidity range non condensing

10% to 85%RH

Ambient temperature is the medium value measured at 30 mm. of distance from the surface of the transformer.

When the transformer is placed inside a metallic shield the above temperature value will be referred to the inside of

the shield even if it is closer then 30 mm to the SMT.

1.3

Storage conditions

Storage temperature

-20

°C to +50°C

After storage to allow a minimum of 24 hours recovery time before testing.

1.4

Marking

The component is marked with:

-

Eldor part number and customer part number (if required).

-

Production date.

1.5

Packaging

TDB

1.6

Weight