SGS Thomson Microelectronics STPS140A, STPS140U Datasheet
®
MAIN PRODUCT CHARACTERISTIC S
STPS140A/U
POWER SCHO TTKY REC TIFIER
I
F(AV)
V
RRM
(max) 0.5 V
V
F
1 A
40 V
FEATURES AND BENEFITS
VERY SMALL CONDUCTION LOS SES
NEGLIGIBLE SWITCHING LOSS ES
LOW FORWARD VOLTA GE DROP
SURFACE MOUNTED DE VICE
DESCR IPTIO N
Single chip Schottky rectifier suited for Switchmode Power Supplies and high frequency DC to
DC converters.
Packaged in SMA and SMB(*), this device is intended for surface mounting and used in low voltage, high frequency inverters, free wheeling and
polarity protection applications.
(*) in accordance with DO214AAand DO21AC JEDEC
ABSOLUTE RATINGS (limiting values)
SMA
STPS140A
SMB
STPS140U
Symbol Parameter Value Unit
V
RRM
I
F(RMS)
I
F(AV)
I
FSM
Repetitive peak reverse voltage 40 V
RMS forward current 7 A
Average forward current
Surge non repetitive forward current tp = 10 ms
δ
= 0.5 SMA TL = 130°C 1 A
SMB T
= 135°C
L
60 A
Sinusoidal
I
RRM
Repetitive peak reverse current tp = 2 µs
1A
F = 1kHz
I
RSM
T
stg
Non repetitive peak reverse current tp = 100µs square 1 A
Storage temperature range - 65 to + 150
Tj Maximum junction temperature 150
dV/dt Critical rate of rise of reverse voltage 10000 V/µs
July 1998 - Ed: 6B
°
C
1/6
STPS140A/U
THERMAL RE SISTA NC ES
Symbol Parameter Value Unit
R
th (j -l)
Junction to lead SMA 30
°
SMB 25
STATIC ELECTRICAL CHARACTE RISTICS
Symbol Tests Conditions Tests Conditions Min. Typ. Max. Unit
* Reverse leakage current Tj = 25°CV
I
R
= 40V 12
R
Tj = 100°C 0.25 2 mA
** Forward voltage drop Tj = 25°CI
V
F
Tj = 125°CI
Tj = 25°CI
Tj = 125°CI
Pulse test : * tp = 5 ms, δ < 2 %
** tp = 380 µs, δ < 2%
= 1 A 0.55 V
F
= 1 A 0.43 0.5
F
= 2 A 0.65
F
= 2 A 0.53 0.6
F
To evaluate the maximum conduction losses use the following equation :
P = 0.4 x I
F(AV)
+ 0.10 x I
F2(RMS)
C/W
µ
A
Fig. 1:
Average forward power dissipation versus
average forward current.
PF(av)(W)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0.0 0.2 0.4 0.6 0.8 1.0 1.2
δ = 0.05
2/6
= 0.1δ
IF(av) (A)
= 0.2δ
= 0.5δ
= 1δ
T
=tp/T
δ
Fig. 2:
Average forward current versus ambient
temperature (δ=0.5).
IF(av)(A)
1.2
1.0
0.8
0.6
0.4
tp
0.2
0.0
0 25 50 75 100 125 150
δ
T
=tp/T
SMA
Rth(j-a)=100°C/W
S(Cu)=1.5cm²
tp
SMB
Rth(j-a)=80°C/W
S(Cu)=1.5cm²
Tamb(°C)
Rth(j-a)=Rth(j-l)
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