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AN2852 Datasheet(PDF) 31 Page - STMicroelectronics

No. de pieza AN2852
Descripción Electrónicos  This document describes the characteristics and performance of a 90 W wide range input
PDF  35 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2852 Datasheet(HTML) 31 Page - STMicroelectronics

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AN2852
AHB transformer specifications
31/35
8
AHB transformer specifications
●
Application type: consumer, IT
●
Transformer type: open
●
Coil former: horizontal type, 7+7 pins
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Max. temp. rise: 45°C
●
Max. operating ambient temp.: 60°C
●
Mains insulation: compliance with EN60950.
8.1
Electrical characteristics
●
Converter topology: asymmetrical half-bridge
●
Core type: ETD34 - N87 or equivalent
●
Operating frequency: 100 kHz
●
Primary inductance: 400 µH 10% at 1 kHz - 0.25 V (see Note 1)
●
Air gap: 2.32 mm on central leg
●
Leakage inductance: 10 µH max. at 100 kHz - 0.25 V (see Note 2)
●
Primary capacitance: 6 pF typ. (see Note 3)
●
Max. peak primary current: 1.93 Apk
●
RMS primary current: 0.75 ARMS
Note:
1
measured between pins 2-4
2
measured between pins 2-4 with secondaries and auxiliary windings shorted
3
calculated considering primary inductance and resonance frequency
Figure 30.
Electrical diagram
AM01845v1
6
5
2
4
14
12
9
10
PRIM.
AUX
SEC.
SEC.



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