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U208B Datasheet(PDF) 5 Page - TEMIC Semiconductors |
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U208B Datasheet(HTML) 5 Page - TEMIC Semiconductors |
5 / 7 page U208B TELEFUNKEN Semiconductors Rev. A1, 28-May-96 5 (7) 0 0.2 0.4 0.6 0.8 0 80 120 160 200 240 Rö ( MW ) 1.0 95 10302 10nF 4.7nF Phase Control Reference Point Pin 2 2.2nF C /t=1.5nF ö Figure 4. 03 6 9 12 0 1 2 3 4 6 Itot ( mA ) 15 95 10317 Mains Supply 5 Figure 5. Design Calculations for Mains Supply The following equations can be used for evaluating the series resistor R1 for worst case conditions: R 1max + 0.85 V Mmin –VSmax 2Itot R 1min + V Mmax –VMmin 2I Smax P( R1max) + (V Mmax –VSmin) 2 2R 1 where: VM = Mains voltage VS = Supply voltage on Pin 4 Itot = Total DC current requirement of the circuit =IS + Ip + Ix IS = Current requirement of the IC in mA Ip = Average current requirement of the triggering pulses Ix = Current requirement of other peripheral components R1 can be easily evaluated from figures 6 and 8 010 20 30 R1 ( kW ) 40 95 10316 Mains Supply 0 1 2 3 4 6 5 Figure 6. 0 200 400 600 800 0 20 40 60 80 100 RGT ( W ) 1000 95 10313 Pulse Output VGT = 0.8V 1.4V Figure 7. 04 8 12 0 10 20 30 40 50 Itot ( mA ) 16 95 10315 Mains Supply Figure 8. |
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Similar Description - U208B |
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