Booster diode

AN2649

14/20

The turn-on switching of the MOSFET is strongly influenced by the diode recovery so the

SiC diode leads to a reduction of the turn-on losses of the switch. The turn-on switching

waveforms for the silicon diode case highlight the current peak at turn-on as shown in

Figure 24. In Figure 25 this is evident as the SiC diode allows a strong reduction of the

current peak.

Figure 20.

Turn-off switch (with Si diode) -

Vin = 88 Vac

Figure 21.

Turn-off switch (with Si diode) -

Vin = 110 Vac

Figure 22.

Turn-off switch (with Si diode) -

Vin = 220 Vac

Figure 23.

Turn-off switch (with Si diode)

-

Vin = 264 Vac