AN4150

List of figures

Doc ID 023526 Rev 1

3/20

List of figures

Figure 1.

Single phase synchronous buck converter topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Figure 2.

HS/LS waveforms during LS turn-off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 3.

Shoot-through event caused by dv/dt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 4.

HS/LS waveforms during LS turn-on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 5.

Testing demonstration board schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 6.

Figure 7.

Device A (left) and device B (right) cross sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 8.

Device A (left) and device B (right) cross sections with geometrical details . . . . . . . . . . . . 10

Figure 9.

Gate charge comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 10.

Device A gate waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 11.

Device B gate waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 12.

Device A vs. device B (experimental results) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 13.

Device A gate waveforms @ LS turn-off (simulated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 14.

Device A gate waveforms @ LS turn-on (simulated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 15.

Device B gate waveforms @ LS turn-off (simulated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 16.

Device B gate waveforms @ LS turn-on (simulated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 17.

Device A vs. device B (simulation results) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15