STPS340U/S/B
THERMAL RESISTANCES
Symbol
Parameter
Value
Unit
Rth (j-l)
20
°C/W
Junction to leads
SMC
SMB
DPAK
25
Rth (j-c)
5.5
°C/W
Junction to case
STATIC ELECTRICAL CHARACTERISTICS
Symbol
Tests Conditions
Tests Conditions
Min. Typ. Max. Unit
IR *
20
µA
mA
V
Tj = 25°C
VR = VRRM
Reverse leakage current
2
10
Tj = 125°C VR = VRRM
VF *
0.63
0.84
0.57
0.72
Tj = 25°C
Tj = 25°C
IF = 3 A
IF = 6 A
Forward voltage drop
0.52
0.63
Tj = 125°C IF = 3 A
Tj = 125°C IF = 6 A
Pulse test : * tp = 380 µs, δ < 2 %
To evaluate the maximum conduction losses use the following equation :
2
P = 0.42 x IF(AV) + 0.050 IF (RMS)
Fig. 1: Average forward power dissipation versus
average forward current.
Fig. 2: Average current versus ambient
temperature (δ =0.5).
IF(av)(A)
PF(av)(W)
3.5
2.5
Rth(j-a)=Rth(j-c)
(DPAK)
δ = 0.1
δ = 0.2
δ = 0.5
3.0
δ = 0.05
2.0
1.5
1.0
0.5
0.0
2.5
Rth(j-a)=65°C/W
Rth(j-a)=Rth(j-l)
δ = 1
(SMB/SMC)
2.0
1.5
T
T
1.0
0.5
tp
=tp/T
δ
tp
=tp/T
Tamb(°C)
δ
IF(av) (A)
0.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
0
25
50
75
100
125
150
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STMICROELECTRONICS [ ST ]
