SPDC400-4W
DC-DC step down power supply
Preliminary Data
Features
■
■
■
■
■
■
■
■
■
■
■
Module DC-DC step down single output
Wide range input voltage 100÷370 V
dc
Output power 4.0 W Typ
Output voltage precision 5%
Output short circuit protection
No heatsink required
Not - latching overload and short circuit
protection
MTBF > 1.000.000 hours (T
A
= 25°C)
Incapsulated or open frame packages
Pins or comb insertion
RoHS compliant
Comb
BT = Encapsulated through hole
Through hole
Description
The DC-DC module is a high efficiency DC-DC
not insulated switch mode constant voltage
generator.
Designed for industrial application where low
voltages are required from main.
Step down converter performs a typ 4.0 W power
conversion.
The output voltages and current level are set up
by design in accordance with customer
requirements.
Typical reference values for the shelf solution are:
■
FT = Open frame through hole
Single output -12 V,
±5%, 0.35 A.
FC = Open Frame
Table 1.
Device summary
Order codes
Package
Encapsulated
Open frame
Open frame
Connections
Through hole
Through hole
Comb
SPDC400BT12M0.35
SPDC400FT12M0.35
SPDC400FC12M0.35
October 2007
Rev 1
1/10
www.st.com
10
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
Contents
SPDC400-4W
Contents
1
2
3
4
5
6
Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Mechanical dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2/10
SPDC400-4W
Application diagram
1
Application diagram
Figure 1.
Application diagram
(For through hole version C must be 100 µF minimum, for Comb version C can
be avoided
1A FUSE
L1
(RECOMMENDED FOR
SAFETY COMPLIANCE)
POWER MODULE
-12V
10µF 400V
N1
C 1000µF
ESR 0.1
Ω
RTN
3/10
Electrical characteristics
SPDC400-4W
2
Electrical characteristics
Table 2.
Symbol
V
i
V
o1
I
o2
V
or
I
osc
n
P
stand by
I
ir
T
op
T
stg
●
Electrical characteristics (T
A
= 25°C, unless otherwise specified.)
Parameter
Input voltage
Output voltage
Output current
Output ripple
Output short circuit
current
Efficiency
V
i
= 100 to 370 V
dc
V
i
= 100 to 370 V
dc
V
i
= 100 to 370 V
dc
V
i
= 100 to 370 V
dc
V
i
= 100 to 370 V
dc
I
o
=0.35 A
Hiccup Mode
80
0.3
30
-10
-20
85
90
Test condition
Min.
100
-12.6
0.35
5%
-12
Typ.
Max.
370
-11.4
Unit
V
dc
V
A
mVpp
A
%
W
A
Power losses in no load V
i
= 320 V
dc
condition
I
o
= 0 mA
Inrush input current
Operating ambient
temperature
Storage temperature
range
V
i
= 320 V
dc
°
C
°
C
Agency approvals
The safety and EMI compliance has to be assured by the user.
4/10
SPDC400-4W
Mechanical dimensions
3
Mechanical dimensions
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a Lead-free second level interconnect . The category of
second level interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at:
www.st.com
Figure 2.
SPDC400BT mechanical data
(dimensions in mm)
35.6
14
21.6
1x45°
Ø0.65
Figure 3.
SPDC400FT mechanical data
(dimensions in mm)
34.1
1
11 max.
20.1
2
1
3
4
0.8x45°
Ø0.65
5
5
5/10
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