DC / DC converter 250W switching power supply circuit diagram composed of TOP249Y

Published:2011/6/30 3:05:00 Author:Ecco | Keyword: DC / DC , converter, 250W , switching power supply | From:SeekIC

The DC / DC converter switching power supply uses a TOP249Y with input 250V ~ 380V DC, and the output is 48V, 5.2A (250W), then the power efficiency is up to 84%. The circuit is shown in Figure 2. High-frequency filter capacitor C1 is specifically inhibit the input from the electromagnetic interference. As the TOP249 works in its power limit, which need short connect X-side and the source S, within the limit is set the maximum current, that is ILIMIT = ILIMIT (max) = 5.7A.



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