AN2649

Booster diode

11/20

For comparison purposes, the same measurements are performed using a fast silicon diode

used in this application (STTA506D, as described in AN628) as the boost diode instead of

SiC. Figure 12, 13, 14, 15 and Figure 16, 17, 18, 19 show the turn-on and the turn-off MOS

waveform for several input voltages and in full-load condition (400 V/0.5 A).

Figure 8.

Turn-off switch (with SiC diode) -

Vin = 88 Vac

Figure 9.

Turn-off switch (with SiC diode) -

Vin = 110 Vac

Figure 10.

Turn-off switch (with SiC diode) -

Vin = 220 Vac

Figure 11.

Turn-off switch (with SiC diode) -

Vin = 264 Vac