50W DC voltage converter using SIPMOS power transistor and integrated circuit

Published:2011/4/20 21:22:00 Author:May | Keyword: 50W, DC voltage converter, SIPMOS power transistor, integrated | From:SeekIC

This circuit adopts push pull type DC converter of integrated circuit TDA4700. Its input voltage is 20~28V. Its output voltage is 5V. The maximum load current is 10A. The oscillation frequency of integrated circuit is 40kHz. Technical data: (1)input voltage Ui:min=20V, typ=24V, max=28V; (2)output voltage Uo: typ=5V; (3)output current Io: min=0A, max=10A;(4)load adjustment rate (load step change 30~100%) : typ=0.2%; (5)efficiency η: typ=81%; (6)SIPMOS transistor loss: when breaking over, PVD: typ=1W; when opening and closing PVS: typ=0.4W; total loss: PVD+PVS: typ=1.4W. Transformer data: n1=n2=14turns, double wrap, twisted wire 120×0.1mm copper enamel wire; n3=n4=5turns, double wrap, twisted wire 120×0.1mm copper enamel wire.



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