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FFH50US60S Datasheet, PDF (5/6 Pages) Fairchild Semiconductor – 50A, 600V Stealth™ Diode
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Typical Performance Curves (Continued)
DUTY CYCLE - DESCENDING ORDER
0.5
1.0 0.2
0.1
0.05
0.02
0.01
PDM
0.1
0.01
10-5
SINGLE PULSE
10-4
t1
t2
NOTES:
DUTY FACTOR: D = t1/t2
PEAK TJ = PDM x ZθJA x RθJA + TA
10-3
10-2
10-1
100
101
t, RECTANGULAR PULSE DURATION (s)
Figure 12. Normalized Maximum Transient Thermal Impedance
Test Circuit and Waveforms
VGE AMPLITUDE AND
RG CONTROL dIF/dt
t1 AND t2 CONTROL IF
L
VGE
t1
t2
DUT CURRENT
RG
SENSE
+
MOSFET
VDD
-
dIF
IF
dt
0
trr
ta
tb
0.25 IRM
IRM
Figure 13. trr Test Circuit
Figure 14. trr Waveforms and Definitions
I = 1A
L = 40mH
R < 0.1Ω
VDD = 50V
EAVL = 1/2LI2 [VR(AVL)/(VR(AVL) - VDD)]
Q1 = IGBT (BVCES > DUT VR(AVL))
L
CURRENT
SENSE
Q1
DUT
R
+
VDD
VDD
-
Figure 15. Avalanche Energy Test Circuit
©2003 Fairchild Semiconductor Corporation
VAVL
IL
IL
IV
t0
t1
t2
t
Figure 16. Avalanche Current and Voltage
Waveforms
FFH50US60S Rev A3
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