
3
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FIGURE 3. t
rr
, t
a
AND t
b
CURVES vs FORWARD CURRENT
FIGURE 4. CURRENT DERATING CURVE
Typical Performance Curves
(Continued)
t
I
F
, FORWARD CURRENT (A)
200
100
50
1.0
10
50
t
rr
t
a
t
b
150
0
35
30
25
20
15
10
5
0
100
140
160
180
T
C
, CASE TEMPERATURE (
o
C)
I
F
,
SQUARE WAVE
DC
120
Test Circuits and Waveforms
FIGURE 5. t
rr
TEST CIRCUIT
FIGURE 6. t
rr
WAVEFORMS AND DEFINITIONS
FIGURE 7. AVALANCHE ENERGY TEST CIRCUIT
FIGURE 8. AVALANCHE CURRENT AND VOLTAGE
WAVEFORMS
R
G
L
V
DD
IGBT
CURRENT
SENSE
DUT
V
GE
t
1
t
2
V
GE
AMPLITUDE AND
R
G
CONTROL dI
F
/dt
t
1 AND
t
2
CONTROL I
F
+
-
dt
dI
F
I
F
t
rr
t
a
t
b
0
I
RM
0.25 I
RM
DUT
CURRENT
SENSE
+
V
DD
L
R
R < 0.1
E
AVL
= 1/2LI
2
[V
R(AVL)
/(V
R(AVL)
- V
DD
)]
Q
1
= IGBT (BV
CES
> DUT V
R(AVL)
)
-
V
DD
Q
1
I = 1.225A
L = 40mH
I V
t
0
t
1
t
2
I
L
V
AVL
t
I
L
RURH30100CC