STGB7NC60HD, STGF7NC60HD, STGP7NC60HD
Figure 18.
I
C
vs. frequency
Electrical characteristics
For a fast IGBT suitable for high frequency applications, the typical collector current vs. maximum operating frequency curve is reported. That frequency is defined as follows:
Equation 1
f
MAX
= (P
D
- P
C
) / (E
ON
+ E
OFF
)
The maximum power dissipation is limited by maximum junction to case thermal resistance:
Equation 2
P
D
=
Δ
T / R
THJ-C considering
Δ
T = T
J
- T
C
= 125 °C- 75 °C = 50°C
The conduction losses are:
Equation 3
P
C
= I
C
* V
CE(SAT)
*
δ with 50% of duty cycle, V
CE(sat)
typical value T
C
= 125°C.
Power dissipation during ON & OFF commutations is due to the switching frequency:
Equation 4
P
SW
= (E
ON
+ E
OFF
) * freq.
Typical values T
V
GE
= 15 V, R
G
C
= 125°C for switching losses are used (test conditions: V
CE
= 3 90 V,
= 3 .
3
Ω
). Furthermore, diode recovery energy is included in the E
ON
, while the tail of the collector current is included in the E
OFF
measurements.
Doc ID 10042 Rev 10 9/22
