AN3329 datasheet(41/47 Pages) STMICROELECTRONICS

No de pièce	AN3329

Description	This application note describes the characteristics and features

PDF	47 Pages

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Fabricant	STMICROELECTRONICS [STMicroelectronics]

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41 / 47 page

AN3329

Resonant power transformer specifications

Doc ID 18376 Rev 1

41/47

Resonant power transformer specifications

General description and characteristics

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Application type: consumer, home appliance

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Transformer type: open

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Coil former: horizontal type, 7+7 pins, two slots

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Max. temp. rise: 45 ºC

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Max. operating ambient temperature: 60 ºC

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Mains insulation: acc. to EN60065

Electrical characteristics

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Converter topology: half bridge, resonant

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Core type: ETD34-PC44 or equivalent

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Min. operating frequency: 70 kHz

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Typical operating frequency: 90 kHz

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Primary inductance: 660 µH ± 8 % at 1 kHz - 0.25 V(b)

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Leakage inductance: 112 µH at 100 kHz - 0.25 V(c)

Figure 64.

Transformer overall drawing

Measured between pins 2-4.

Measured between pins 2-4 with secondary windings with same polarity shorted at time.

Table 4.

Resonant transformer winding data

Pins

Winding

DC resistance

Number of turns

Wire type

2-4

Primary

158 m

30x

φ 0.1 mm – G1

6 - 7

AUX

94 m

φ 0.28 mm – G2

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