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AN2844 датащи(PDF) 30 Page - STMicroelectronics |
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AN2844 датащи(HTML) 30 Page - STMicroelectronics |
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30 / 37 page ![]() Transformer specification AN2844 30/37 9 Transformer specification ● Application type: customer, home appliances ● Winding type: layer ● Coil former: vertical type - 14 pins ● Material of coil former: GFR thermostatic plastic UL 94 V-0 ● Maximum temperature increase: 45° C ● Maximum operating ambient temperature: 60° C ● Mains insulation: according to EN60950 9.1 Electrical characteristics ● Converter topology: flyback working in boundary mode ● Minimum switching frequency: > 32 kHz ● Lp = 5.8 mH ● Np/Ns = 70.2 ● Reflected flyback voltage: 400 VDC ● Core type: ETD29 - EPCOS ● Core material: N87 from EPCOS or similar ● Air gap: 0.60 mm The design of the related power transformer has been further optimized by EGSTON System Electronics Eggenburg GmbH, manufacturer of the transformer. The ordering type is 39663. Figure 29. Electrical diagram of the transformer AM003547 90 T 90 T 12 T 1 2 3 4 6 7 12 10 1/2 A PRIMARY 1/2 B PRIMARY AUXILIARY SECONDARY 3T |
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