Re: AW: Re: Aw: Re: AW: Re: [EVGRAY] Re: Push pull generator.

Body

Got truncated again.

Hi Sven,

The website is in German too: https://server.ibfriedrich.com/wiki/ibfwikide/index.php/Hauptseite https://server.ibfriedrich.com/wiki/ibfwikide/index.php/Hauptseite
The pages aren't built the same way as for the English part though.

The two figures 31a and 31b shows the difference in the wiring. In figure 31a the inductance of the source lead and an extra wire in series with the source leg shares the current of both the gate circuit as well as the load current. This induces voltages that are added (in series) to the gate driver voltage which make false signals on the gate.

The figures are cut and pasted from here: https://www.infineon.com/dgdl/an-937.pdf?fileId=5546d462533600a40153559ea1481181 https://www.infineon.com/dgdl/an-937.pdf?fileId=5546d462533600a40153559ea1481181

In figure 31b the gate current and load current is only shared by the source lead which makes the induced voltages less than that in figure 31a. Also observe where the decoupling capacitor is placed to make the smallest loop of the MOSFET and its load and minimum shared current of the gate circuit and load circuit.

Regards
Ole