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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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AN4248 데이터시트(PDF) 37 Page - STMicroelectronics |
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AN4248 데이터시트(HTML) 37 Page - STMicroelectronics |
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37 / 46 page  DocID024214 Rev 1 37/46 AN4248 Short-circuit test In Figure 34 , we can observe the behavior of the VCC voltage as described above. In Figure 35, the waveforms are triggered in different time scale, where single switching pulses are spaced with 150 us. Figure 36 & 37 displays more clearly the single pulse timing and peak values of drain- source voltage with leakage spike overshoot and peak drain current values. Triggered at different levels corresponding to different Ton instants. Looking to figure 22, maximum drain current is limited to 2.7 A peak approx and there is no saturation effect observed in transformer. The overall operation is safe and average input power from the mains drops to negligible values. Figure 32. Hold up test CH1: load current 2.4 A max; CH4: AC Input 230 V |
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