AN3105

Transformer specification

Doc ID 16774 Rev 2

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Transformer specification

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 °C

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Max. operating ambient temperature: 60 °C

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Mains insulation: acc. With EN60950

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: 100 kHz

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Electrical diagram and winding characteristics

Figure 19.

Transformer electrical diagram

b.

Measured between pins 2-4.

c.

Measured between pins 2-4 with only one secondary winding shorted. The difference between the two

measured leakage inductances must be < 10%.