15ETH06PbF, 15ETH06FPPbF
Bulletin PD-20886 rev. A 10/06
10
Thermal Impedance Z
thJC
(°C/W)
1
D = 0.50
D = 0.20
D = 0.10
D = 0.05
D = 0.02
D = 0.01
Single Pulse
(Thermal Resistance)
Notes:
P
DM
t1
t2
0.1
1. Duty factor D = t1/ t2
2. Peak Tj = Pdm x ZthJC + Tc
0.01
0.00001
0.0001
0.001
0.01
0.1
1
10
100
t
1
, Rectangular Pulse Duration (Seconds)
Fig. 5 - Max. Thermal Impedance Z
thJC
Characteristics (FULLPACK)
180
Allowable Case Temperature (°C)
Allowable Case Temperature (°C)
180
160
140
120
100
80
60
Square wave (D = 0.50)
40
80% Rated Vr applied
20
see note (3)
0
0
4
8
12
16
20
24
Average Forward Current - I
F
(AV)
(A)
DC
170
160
DC
150
140
130
80% Rated Vr applied
120
see note (3)
110
0
5
10
15
20
25
Average Forward Current - I
F
(AV)
(A)
Fig. 6 - Max. Allowable Case Temperature
Vs. Average Forward Current
Square wave (D = 0.50)
Fig. 7 - Max. Allowable Case Temperature
Vs. Average Forward Current (FULLPACK)
35
Average Power Loss ( Watts )
30
25
20
15
10
5
0
0
5
10
15
20
25
Average Forward Current - I
F
(AV)
(A)
D = 0.01
D = 0.02
D = 0.05
D = 0.1
D = 0.2
D = 0.5
DC
(3)
Formula used: T
C
= T
J
- (Pd + Pd
REV
) x R
thJC
;
Pd = Forward Power Loss =
I
F(AV)
x V
FM
@ (I
F(AV)
/
D)
(see Fig. 8);
Pd
REV
= Inverse Power Loss = V
R1
x I
R
(1 - D);
I
R
@ V
R1
= rated V
R
RMS Limit
Fig. 8 - Forward Power Loss Characteristics
4
www.irf.com
IRF [ INTERNATIONAL RECTIFIER ]
