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AN4026 датащи(PDF) 37 Page - STMicroelectronics |
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AN4026 датащи(HTML) 37 Page - STMicroelectronics |
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37 / 40 page ![]() AN4026 Transformer specifications Doc ID 022603 Rev 1 37/40 9 Transformer specifications 9.1 General description and characteristics ● Application type: consumer, home appliance ● Transformer type: open ● Coil former: horizontal type, 7+7 pins, two slots ● Max. temperature rise: 45 ºC ● Max. operating ambient temperature: 60 ºC ● Mains insulation: acc. to EN60065. 9.2 Electrical characteristics ● Converter topology: half bridge, resonant ● Core type: ETD34-PC44 or equivalent ● Min. operating frequency: 60 kHz ● Typical operating frequency: 90 kHz ● Primary inductance: 2.00 mH ± 10% at 1 kHz - 0.25 V(b) ● Leakage inductance: 300 µH at 100 kHz - 0.25 V(c). 9.3 Electrical diagram and winding characteristics Figure 32. Transformer electrical diagram b. Measured between pins 2-4. c. Measured between pins 2-4 with only one secondary winding shorted. |
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