Power integrations Scale-2 1SC0450E2B0, Applications Manual, Page: 13 / 25

SCALE™-2 1SC0450E2B0
Preliminary Description & Application Manual
www.power.com/igbt-driver Page 13
V
DC-Link
R
a
=68kΩ R
a
=91kΩ R
a
=120kΩ
4500V 5.3µs 6.9µs 9.0µs
3000V 5.3µs 7.0µs 9.1µs
2250V 5.5µs 7.0µs 9.1µs
1500V 7.2µs 8.0µs 9.4µs
1125V 9.9µs 10.3µs 11.1µs
900V 14.1µs 14.1µs 14.2µs
Table 1 Typical response time as a function of the resistance R
a
and the DC-link voltage V
DC-Link
Table 1 gives indicative values only. The response time depends on the specific layout and the IGBT module
used. It is therefore recommended to measure the short-circuit duration in the final design.
Note that slow IGBT modules may report a wrong V
CE
desaturation fault at turn-on. It is therefore
recommended to test the setup under worst case conditions (maximum DC-link voltage, maximum collector
current and highest IGBT junction temperature). Please also refer to AN-1101 /4/ for more information.
Recommended values for 4500V IGBTs with DC-link voltages up to 3200V
 R
vce1
=R
vce2
=…=R
vce20
=220kΩ (500mW, 400V
peak
, 1%)
 R
div
=620kΩ (0603, 1%)
 C
vce1
=15pF (C0G, 1000V, 5%)
 C
vce2
=C
vce3
=…=C
vce10
=22pF (C0G, 630V, 5%)
 C
a
=22pF (C0G, 50V, 5%)
 R
th
=not assembled
 R
a
=refer to Table 2 below (0603, 1%)
This setup uses 20 resistors R
vcei
and 10 capacitors C
vcek
and leads to a static desaturation detection
threshold of about 150V.
V
DC-Link
R
a
=68kΩ R
a
=91kΩ R
a
=120kΩ
3200V 5.1µs 6.8µs 8.8µs
2000V 5.2µs 6.8µs 8.9µs
1500V 6.1µs 7.0µs 8.9µs
1000V 8.8µs 9.3µs 10.3µs
800V 12.7µs 13.1µs 12.9µs
Table 2 Typical response time as a function of the resistance R
a
and the DC-link voltage V
DC-Link
Table 2 gives indicative values only. The response time depends on the specific layout and the IGBT module
used. It is therefore recommended to measure the short-circuit duration in the final design.
Note that slow IGBT modules may report a wrong V
CE
desaturation fault at turn-on. It is therefore
recommended to test the setup under worst case conditions (maximum DC-link voltage, maximum collector
current and highest IGBT junction temperature). Please also refer to AN-1101 /4/ for more information.