I am working on DC-DC converter. Can anyone help me on how the DC-DC converter switching losses can be reduced?
Switching losses can be reduced by using Soft Switching or High Current Drivers.
If you can change the layout of the board and ready to work with soft switching converters, you can choose that. But again you need to analyze so many soft switching converters to see which one suits you the best in giving the least switching losses.
However, you can reduce the switching losses significantly by using high current gate drivers typically above 3 amps and you can further reduce your losses by selecting your switches which have lesser gate charge. But by using a high current driver, you can definitely reduce the switching losses significantly. While using the high current driver, select your gate resistance correctly. you should analyze what gate current will give you considerable amount of loss for your power level and then select it.
Regards :
Vamsi Kaushik
The latest family of IGBT's are helpful as well with those drivers.But you need to be careful with the EMC aspects. The short commuting times can introduce severe harmonics, when a sophisticated zero-crossing detecting circuit is not applied. Also a good designed and located filter (mostly a third order filter connected in a metal casing to the metal enclosure, will avoid a lot of problems.
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