Team,
my customer can define a drive current via SPI. They have a switching loss calculation for their switches based on the specification of the gate resistance. They can't calculate the switching losses with the drive current. If they calculate an Rg at 150mA and 13.5V, for example, they get to 13.5V/150mA=90Ohm. This means that the switching losses are very high. Also, they don't think this calculation is correct as the current is likely to be held at 150mA and not limited to 150mA at the start of turn-on. So the equivalent gate resistance is much lower.
Do you have suggestions or calculation formulae for switching losses?
Can they assume that the current remains 150mA until the gate capacitance is fully charged?
Best regards
