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AN1523 Datasheet(PDF) 20 Page - STMicroelectronics

Part # AN1523
Description  11W FLYBACK CONVERTER FOR AUXILIARY POWER SUPPLY APPLICATION USING THE L6590
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN1523 Datasheet(HTML) 20 Page - STMicroelectronics

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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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