[SOLVED] SG3524 100v 25a smps

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Can you draw it
i cant get it
the colector of the igbts is connecte to the +400v, the emiter is at -400v
the only connection between the power input and the 3524 are the gates of the igbts
if you mean the earth ground which is drawn next to the ac - it is safety ground-it is not connected with the common gnd
 

the only connection between the power input and the 3524 are the gates of the igbts
Right, that's another drawing error of the copied schematic. DC- must be connected to the controller ground, however. How should the gate control work otherwise?
 
ssshocked,i will like you to download the datasheet of SG3524 and go through it you will understand how everything works.
 
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