AN3203 datasheet(44/49 Pages) STMICROELECTRONICS

Numer części	AN3203

Szczegółowy opis	This application note describes the characteristics and performance

PDF	49 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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44 / 49 page

AUX flyback transformer specification

AN3203

44/49

Doc ID 17402 Rev 2

AUX flyback transformer specification

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Application type: Consumer, IT

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Transformer type: Open

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Coil former: vertical type, 5+5 pins

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Max. temp. rise: 45 °C

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Max. operating ambient temp.: 60 °C

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Mains insulation: Compliance with EN60950

9.1

Electrical characteristics

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Converter topology: Flyback, CCM/DCM mode

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Core Type: E20/10/6 (EF20) - N87 or equivalent

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Operating frequency: 115 kHz

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Primary inductance: 1.7 mH 10 % @1 kHz - 0.25 V (d)

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Air gap: 1.24 mm on central leg

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Leakage inductance: 50 µH max. @100 kHz - 0.25 V (e)

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Max. peak primary current: 0.74 Apk

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RMS primary current: 0.17 ARMS

Figure 35.

Electrical diagram

Measured between pins 1-3

Measured between pins 1-3 with secondaries and auxiliary windings shorted

AN3203 Arkusz danych(PDF) 44 Page - STMicroelectronics