Datasheet

AN3329 Resonant power transformer specifications
Doc ID 18376 Rev 1 41/47
8 Resonant power transformer specifications
General description and characteristics
● Application type: consumer, home appliance
● Transformer type: open
● Coil former: horizontal type, 7+7 pins, two slots
● Max. temp. rise: 45 ºC
● Max. operating ambient temperature: 60 ºC
● Mains insulation: acc. to EN60065
Electrical characteristics
● Converter topology: half bridge, resonant
● Core type: ETD34-PC44 or equivalent
● Min. operating frequency: 70 kHz
● Typical operating frequency: 90 kHz
● Primary inductance: 660 µH ± 8 % at 1 kHz - 0.25 V
(b)
●
Leakage inductance: 112 µH at 100 kHz - 0.25 V
(c)
Figure 64. Transformer overall drawing
b. Measured between pins 2-4.
c. 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 mΩ 36 30xφ 0.1 mm – G1
6 - 7 AUX 94 mΩ 3 φ 0.28 mm – G2
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