AN3203 datasheet(41/49 Pages) STMICROELECTRONICS

部件名	AN3203

功能描述	This application note describes the characteristics and performance

PDF	49 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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41 / 49 page

AN3203

AHB transformer specification

Doc ID 17402 Rev 2

41/49

AHB 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, 6+6 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

8.1

Electrical characteristics

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Converter topology: Asymmetrical half bridge

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Core Type: PQ3230 – PC44 or equivalent

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Operating frequency: 80 kHz

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Primary inductance: 500

μH ±10 % @1 kHz – 0.25 V (a)

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Air gap: 0.3 mm on central leg

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Leakage inductance: 12

μH typ. @100 kHz – 0.25 V (b)

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Primary capacitance: 6 pF typ.(c)

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Max. peak primary current: 3.85 Apk

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RMS primary current: 2 ARMS

Figure 32.

Electrical diagram

Measured between pins 2-4

Measured between pins 2-4 with secondaries and auxiliary windings shorted

Calculated considering primary inductance and resonance frequency

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