STTH803D/G
October 1999 - Ed: 5C
HIGH FREQUENCY SECONDARY RECTIFIER
Single Fast Recovery Epitaxial Diode suited for
Switch Mode Power Supply and high frequency
DC/DC converters.
Packaged in TO-220AC or D
2
PAK this device is
especially intended for secondary rectification.
DESCRIPTION
COMBINES HIGHEST RECOVERY AND
REVERSE VOLTAGE PERFORMANCE
ULTRA-FAST, SOFT AND NOISE-FREE
RECOVERY
FEATURES AND BENEFITS
Symbol
Parameter
Value
Unit
V
RRM
Repetitive peak reverse voltage
300
V
I
F(RMS)
RMS forward current
20
A
I
F(AV)
Average forward current
Tc = 150
C
= 0.5
8
A
I
FSM
Surge non repetitive forward current
tp = 10 ms sinusoidal
100
A
I
RSM
Non repetitive avalanche current
tp = 20
s square
4
A
T
stg
Storage temperature range
-65 +175
C
Tj
Maximum operating junction temperature
+ 175
C
ABSOLUTE RATINGS (limiting values)
I
F(AV)
8 A
V
RRM
300 V
Tj (max)
175 C
V
F
(max)
1 V
trr (max)
35 ns
MAJOR PRODUCTS CHARACTERISTICS
D
2
PAK
STTH803G
K
A
N.C.
K
K
A
TO-220AC
STTH803D
1/6
Symbol
Parameter
Tests conditions
Min.
Typ.
Max.
Unit
I
R
*
Reverse leakage
current
V
R
= 300 V
Tj = 25
C
20
A
Tj = 125
C
20
200
V
F
**
Forward voltage drop
I
F
= 8 A
Tj = 25
C
1.25
V
I
F
= 8 A
Tj = 125
C
0.85
1
Pulse test : * tp = 5 ms,
< 2 %
** tp = 380
s,
< 2%
To evaluate the maximum conduction losses use the following equation :
P = 0.75 x I
F(AV)
+ 0.031 I
F
2
(RMS)
STATIC ELECTRICAL CHARACTERISTICS (per diode)
Symbol
Parameter
Value
Unit
R
th (j-c)
Junction to case
2.5
C/W
THERMAL RESISTANCES
Symbol
Tests conditions
Min.
Typ.
Max.
Unit
trr
I
F
= 0.5 A Irr = 0.25 A I
R
= 1 A
Tj = 25
C
25
ns
I
F
= 1 A dI
F
/dt = - 50 A/
s V
R
= 30 V
Tj = 25
C
35
tfr
I
F
= 8 A dI
F
/dt = 100 A/
s
V
FR
= 1.1 x V
F
max.
Tj = 25
C
200
ns
V
FP
Tj = 25
C
3.5
V
S
factor
Vcc = 200V I
F
= 8 A
dI
F
/dt = 200 A/
s
Tj = 125C
0.3
-
I
RM
8
A
RECOVERY CHARACTERISTICS
STTH803D/G
2/6
0
1
2
3
4
5
6
7
8
9
10
0
2
4
6
8
10
12
IF(av) (A)
P1(W)
T
=tp/T
tp
= 1
= 0.5
= 0.2
= 0.1
= 0.05
Fig. 1: Conduction losses versus average current.
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
0.1
1.0
10.0
100.0
VFM(V)
IFM(A)
Tj=125C
Tj=25C
Tj=75C
Fig. 2: Forward voltage drop versus forward
current (maximum values
).
1E-3
1E-2
1E-1
1E+0
0.0
0.2
0.4
0.6
0.8
1.0
tp(s)
Zth(j-c)/Rth(j-c)
T
=tp/T
tp
Single pulse
= 0.5
= 0.2
= 0.1
Fig. 3: Relative variation of thermal impedance
junction to case versus pulse duration.
0
50
100 150 200 250 300 350 400 450 500
0
10
20
30
40
50
60
70
80
90
100
trr(ns)
VR=200V
Tj=125C
IF=2*IF(av)
IF=IF(av)
IF=0.5*IF(av)
dIF/dt(A/s)
Fig. 5: Reverse recovery time versus dI
F
/dt (90%
confidence).
0
50
100 150 200 250 300 350 400 450 500
0
2
4
6
8
10
12
14
16
dIF/dt(A/s)
IRM(A)
VR=200V
Tj=125C
IF=2*IF(av)
IF=IF(av)
IF=0.5*IF(av)
Fig. 4: Peak reverse recovery current versus
dI
F
/dt (90% confidence).
0
50
100 150 200 250 300 350 400 450 500
0.00
0.10
0.20
0.30
0.40
0.50
0.60
S factor
VR=200V
Tj=125C
dIF/dt(A/s)
Fig. 6: Softness factor versus dI
F
/dt (typical
values).
STTH803D/G
3/6
25
50
75
100
125
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
Tj(C)
IRM
S factor
Fig. 7: Relative variation of dynamic parameters
versus junction temperature (reference: Tj = 125C).
0
50
100 150 200 250 300 350 400 450 500
0
1
2
3
4
5
6
7
8
VFP(V)
IF=IF(av)
Tj=125C
dIF/dt(A/s)
Fig. 8: Transient peak forward voltage versus
dI
F
/dt (90% confidence).
0
50
100 150 200 250 300 350 400 450 500
0
50
100
150
200
250
300
tfr(ns)
VFR=1.1*VF max.
IF=IF(av)
Tj=125C
dIF/dt(A/s)
Fig. 9: Forward recovery time versus dI
F
/dt (90%
confidence).
STTH803D/G
4/6
PACKAGE MECHANICAL DATA
D
2
PAK
A
C2
D
R
A2
M
V2
C
A1
G
L
L3
L2
B
B2
E
*
* FLAT ZONE NO LESS THAN 2mm
REF.
DIMENSIONS
Millimeters
Inches
Min.
Max.
Min.
Max.
A
4.40
4.60
0.173
0.181
A1
2.49
2.69
0.098
0.106
A2
0.03
0.23
0.001
0.009
B
0.70
0.93
0.027
0.037
B2
1.14
1.70
0.045
0.067
C
0.45
0.60
0.017
0.024
C2
1.23
1.36
0.048
0.054
D
8.95
9.35
0.352
0.368
E
10.00
10.40
0.393
0.409
G
4.88
5.28
0.192
0.208
L
15.00
15.85
0.590
0.624
L2
1.27
1.40
0.050
0.055
L3
1.40
1.75
0.055
0.069
M
2.40
3.20
0.094
0.126
R
0.40 typ.
0.016 typ.
V2
0
8
0
8
8.90
3.70
1.30
5.08
16.90
10.30
FOOT PRINT DIMENSIONS (in millimeters)
D
2
PAK
STTH803D/G
5/6
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