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AN1523 Datasheet(PDF) 20 Page - STMicroelectronics |
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AN1523 Datasheet(HTML) 20 Page - STMicroelectronics |
20 / 24 page ![]() AN1523 APPLICATION NOTE 20/24 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. 3 / 6 2.0 ELECTRICAL CHARACTERISTICS For pins identifi cation refer to mechanical drawing 2.1 Static characteristics 2.1.1 Inductance and DC resistance: Measurement of inductance is made using a LCR bridge at frequency of 10KHz at output voltage of 1 V r.m.s. Measurement of resistance is made using a four wire ohmmeter. Temperature should be 23 ± 2°C. L(mH) tol(%) R( Ω) tol(%) Between pin 2 and pin 1 2.0 ±10 2.31 ±15 2.1.2 Leakage Inductance: LL= 6 %Lp (pin 2 pin 1 ) Measurement is made with the secondary windings short circuited. Measurement if inductance is made using a LCR bridge at frequency of 10 kHz and at output voltage of 1 V R.M.S. 2.1.3 Withstanding voltage The transformer shall withstand a voltage of 3.75kV RMS for 60 seconds between primary winding and secondary windings. The frequency of the test voltage shall be 50 or 60Hz. 2.2 Test circuit diagram and application conditions +5V/1.4A +12V/0.3A 1 4 5 7 6 8 2 3 +V Drain supply IC |
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