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 D2PAK this device is
especially int ended for sec ondary r ectification.
DESCRIPTION
COMBINES HIG HE ST RE CO VERY AND
REVERSE VOLTAGE PERFORMANCE
ULTRA-FAST, SOFT AND NOISE-FREE
RECOVERY
FEAT URES AND BENE FITS
Symbol Parameter Value Unit
VRRM Repetitive peak reverse voltage 300 V
IF(RMS) RMS forward current 20 A
IF(AV) Average forward current Tc = 150°C δ = 0.5 8A
I
FSM S urge non repetitive forward current tp = 10 ms sinusoidal 100 A
IRSM Non repetitive avalanche current tp = 20 µs square 4A
T
stg Storage temperature range -65 +175 °C
Tj Maximum operating junction temperature + 175 ° C
ABSOLUTE RATINGS (limiting values)
IF(AV) 8 A
VRRM 300 V
Tj (max) 175 ° C
VF (max) 1 V
trr (max) 35 ns
MAJOR PROD UCTS CHAR ACTERISTICS
D2PAK
STTH803G
K
A
N.C.
K
K
A
TO-220AC
STTH803D
1/6
Symbol Parameter Tests conditions Min. Typ. Max. Unit
IR * Reverse leakage
current VR = 300 V Tj = 25°C20 µA
Tj = 125°C20 200
VF ** Forward voltage drop IF = 8 A Tj = 25°C1.25 V
IF = 8 A Tj = 125 °C0.85 1
Pulse test : * tp = 5 ms, δ < 2 %
** tp = 380 µs, δ < 2%
To evaluate the maximum conduction losses use the following equation :
P = 0. 75 x IF(AV) + 0.031 IF2(RMS)
STATIC ELE CTRICAL CHARACTE RISTICS (per diode)
Symbol Parameter Value Unit
Rth (j-c) Junction to case 2.5 °C/W
THE RMA L RE SISTA NC ES
Symbol Tests conditions Min. Typ. Max. Unit
trr IF = 0.5 A Irr = 0.25 A IR = 1 A Tj = 25°C25 ns
IF = 1 A dIF/dt = - 50 A/µs VR = 30 V Tj = 25°C35
tfr IF = 8 A dIF/dt = 100 A/µs
VFR = 1.1 x VF max . Tj = 25 °C200 ns
VFP Tj = 25°C3.5 V
Sfactor Vcc = 200V I
F
= 8 A
dIF/dt = 200 A/µsTj = 125° C 0.3 -
IRM 8A
RECOVE RY CH ARACT E RISTICS
STTH803D/G
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012345678910
0
2
4
6
8
10
12
IF(av) (A)
P1(W)
T
δ
=tp/T tp
δ= 1
δ= 0.5
δ= 0.2
δ= 0.1
δ= 0.05
Fig. 1: Conduction losses v ersus aver age 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=125°C
Tj=25°C
Tj=75°C
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
δ
=tp/T tp
Single pulse
δ= 0.5
δ= 0.2
δ= 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=125°C
IF=2*IF(av) IF=IF(av)
IF=0.5*IF(av)
dIF/dt(A/µs)
Fig. 5 : R eve rse recove ry t ime versu s dIF/ 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/µs)
IRM(A)
VR=200V
Tj=125°C IF=2*IF(av)
IF=IF(av)
IF=0.5*IF(av)
Fig. 4: Peak reverse recovery current versus
dIF/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=125°C
dIF/dt(A/µs)
Fig. 6: Softness factor versus dIF/dt (typical
values).
STTH803D/G
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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 = 125° C).
0 50 100 150 200 250 300 350 400 450 500
0
1
2
3
4
5
6
7
8VFP(V)
IF=IF(av)
Tj=125°C
dIF/dt(A/µs)
Fig. 8: Transient peak forward voltage versus
dIF/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=125°C
dIF/dt(A/µs)
Fig. 9 : Forward recovery time versus dIF/dt (90%
confidence).
STTH803D/G
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PACKAGE M E CHANI CAL DATA
D2PAK
A
C2
D
R
A2
MV2
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)
D2PAK
STTH803D/G
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PACKAGE MECHANICAL DAT A
TO-220AC
REF. DIMENSIONS
Millimeters Inches
Min. Max. Min. Max.
A 4.40 4.60 0.173 0.181
C 1.23 1.32 0.048 0.051
D 2.40 2.72 0.094 0.107
E 0.49 0.70 0.019 0.027
F 0.61 0.88 0.024 0.034
F1 1.14 1.70 0.044 0.066
G 4.95 5.15 0.194 0.202
H2 10.00 10.40 0.393 0.409
L2 16.40 typ. 0.645 typ.
L4 13.00 14.00 0.511 0.551
L5 2.65 2.95 0.104 0.116
L6 15.25 15.75 0.600 0.620
L7 6.20 6.60 0.244 0.259
L9 3.50 3.93 0.137 0.154
M 2.6 typ. 0.102 typ.
Diam. I 3.75 3.85 0.147 0.151
Ordering code Marking Package Weight Base q ty Delivery mode
STTH803D STTH803D TO-220AC 1.86g 50 Tube
STTH803G STTH803G D2PAK 1.48g 50 Tube
Cooling method: by conduction (C)
Recommended torque value (TO-220AC): 0.55 N.m.
Maximum torque value (TO-220AC): 0.70 N.m.
Epoxy m eets UL 94,V0
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change without notice. This publication supersedes and replaces all information previously supplied.
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© 1999 STMicroelectronics - Printed i n Italy - All rights reser ved.
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A
C
D
E
M
L7
H2
Ø I
L5
L6
L9
L4
G
F1
F
L2
STTH803D/G
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