4

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Test Circuits and Waveforms

FIGURE 10. AVALANCHE ENERGY TEST CIRCUIT

FIGURE 11. AVALANCHE CURRENT AND VOLTAGE

WAVEFORMS

L

IGBT

CURRENT

SENSE

DUT

+

-

dt

trr

ta

tb

0

DUT

CURRENT

SENSE

+

LR

R < 0.1

Ω

-

L = 40mH

IV

t

RHRP840, RHRP860