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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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AN2708 Datenblatt(PDF) 23 Page - STMicroelectronics |
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AN2708 Datenblatt(HTML) 23 Page - STMicroelectronics |
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23 / 42 page  AN2708 High-frequency ballast 23/42 Figure 16. Lamps running at 230 Vac - full power The efficiency of the system is a little bit lower than a standard HF ballast due to the supply section of the slave and the resistors in series to the lamp’s cathode used to ensure a minimum current at low dimming level. Table 9. Ballast performances Vin (Vac) Pin (W) PF THD (%) Po (W) η(%) 90 76.5 0.999 3.9 66 86.2 110 75.5 0.999 3.6 66 87.4 140 74.2 0.998 5.5 66 89 176 73.7 0.997 7.2 66 90 230 73 0.997 7.3 66 90 265 72.8 0.996 8.3 66 91 CH1 (yellow): lamp1 voltage CH2 (blue): lamp1 current Ch3 (magenta): lamp2 voltage CH4 (green): lamp2 current |
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