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FDA16N50 Datasheet(PDF) 6 Page - Fairchild Semiconductor |
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FDA16N50 Datasheet(HTML) 6 Page - Fairchild Semiconductor |
6 / 8 page AN-9066 APPLICATION NOTE Output Power [W] 0 100 200 300 400 500 600 93 94 95 96 97 98 UniFET, 20A/500V Super-junction, 21A/500V Figure 7. Efficiency Curves with 115V AC Input The efficiency results are shown in Figure 7. There is not much difference in efficiency when in heavy load. Basically, the super-junction device has lower RDS(on) than the UniFET at same drain current rating and therefore will have more conduction loss advantage as the load becomes heavier. The smaller switching loss of the UniFET compensates its higher RDS(on) well in heavy load area and the UniFET shows slightly better performance. In the light- load area, the switching loss dominates the power losses and the UniFET surpasses the super-junction device. Conclusion The performance of the UniFET ™ was evaluated at both device level and system level. It showed good results against the super-junction device and can be an optimum solution in DCM PFC application as long as required breakdown voltage of the boost switch is 500V. The interleaved DCM PFC is gaining attention recently and this is another application where the UniFET can be considered as a high-performance, cost-effective boost switch. © 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com Rev. 1.0.1 • 4/3/09 6 |
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