RURD420S
Test Circuits and Waveforms (Continued)
I = 1A
L = 20mH
R < 0.1Ω
EAVL = 1/2LI2 [VR(AVL) /(VR(AVL) - VDD)]
Q1 = IGBT (BVCES > DUT VR(AVL))
L
CURRENT
SENSE
Q1
DUT
R
+
VDD
VDD
-
FIGURE 9. AVALANCHE ENERGY TEST CIRCUIT
VAVL
IL
IL
IV
t0
t1
t2
t
FIGURE 10. AVALANCHE CURRENT AND VOLTAGE
WAVEFORMS
©2002 Fairchild Semiconductor Corporation
RURD420S Rev. C