Electromagnetic Considerations for Designing Double-Sided Power Modules

Double-sided power modules are particularly attractive due to their high thermal performance. Thanks to the stacking of two direct bond coppers, very low stray inductances may be expected, particularly because of the proximity of the two rear metalizations. On the other hand, capacitive effects may be increased. In this paper, the complete electromagnetic behavior of double-sided power modules is studied, regarding both internal coupling and unwanted electromagnetic compatibility emissions. Some layout and active solutions are proposed to reduce common-mode emissions.