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Selecting Gate Drive Resistors
Keysight Double-Pulse Test Fixture Installation and Use Guide
Switching characteristics of the DUT are influenced by the Gate
resistor value. A small resistor value allows for faster switching
but it increasing the ringing. A large gate resistor value slows
down the turn-on of the device but allows for a more accurate
gate charge measurement.
A 0 R
cannot be used for Gate Charge measurements because
G
the gate current cannot be measured.
– In some cases, di/dt is defined in device data sheet for reverse recovery
measurement. Using 0, 10 and 100 Ohm Gate Drive Resistors (R
graph like the one shown in Figure 33, it is easier to find the appropriate
. For example, in Figure 33, if the defined di/dt is 200 A/ µ s for a
R
G
condition (400V/10A with V
value should be in between 10 and 20 .
curve), the R
G
0V to 18V which corresponds to orange
GS
Custom Gate Drive Resistors
)
draw a
G
,
71
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