How to minimize switching losses

AN4671

12/17

DocID027654 Rev 1

The peak gate current is lower than 2 A in both cases; under any other test condition

(higher case temperatures and lower drain current values), the gate current decreases

slightly at turn-off and increases by a similar amount at turn-on.

Both the voltage across the gate resistor and the gate current are limited by the parasitic

source inductance and the drain current di/dt; Figure 11 in fact shows a high degree of

on.

Ideally, if the effect of the parasitic L were removed, we would expect the source current to

Ω (see Figure 12) the gate current

is quite stable and independent of the drain current.