PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
Input voltage up to 144 VDC
Single output of 12 to 48 VDC
No input to output isolation
•
High efficiency up to 97%
•
Extremely wide input voltage range
• Low input to output differential voltage
•
Very good dynamic properties
•
Input undervoltage lock-out
111
4.4"
3U
60
2.4"
12 TE
168
6.6"
•
Active current sharing for parallel operation
• Output voltage adjustment, inhibit and sense lines
• Fast dynamic response
•
Continuous no-load and short-circuit proof
•
No derating
Safety according to IEC/EN 60950, UL 1950
Summary
The PSS/PSK series of positive switching regulators is de-
signed as power supply modules for electronic systems.
Their major advantages include a high level of efficiency
that remains virtually constant over the entire input range,
high reliability, low ripple and excellent dynamic response.
Modules with input voltages up to 144 V are specially
designed for secondary switched and battery-driven
mobile applications. The standard case design with heat
sink allows operation at nominal load up to 71°C without
additional cooling, suitable for 19" rack or chassis
mounting.
Replacing the heat sink by an optional cooling plate B or B1,
allows chassis or wall mounting on top of a metal surface,
acting as heat sink.
Connector type: H15 (according to DIN 41612).
111
4.4"
3U
80
3.2"
16 TE
168
6.6"
Table of Contents
Page
Page
Electromagnetic Compatibility (EMC) ............................. 9
Immunity to Environmental Conditions ......................... 10
Mechanical Data ........................................................... 11
Safety and Installation Instructions ................................ 13
Description of Options ................................................... 15
Accessories ................................................................... 17
EC Declaration of Conformity ........................................ 18
Summary ......................................................................... 1
Model Selection and Key Data ........................................ 2
Part Number Description and Product Marking .............. 2
Functional Description .................................................... 3
Electrical Input Data ........................................................ 3
Electrical Output Data ...................................................... 4
Auxiliary Functions .......................................................... 7
REV. FEB. 25 2004
Page 1 of 18
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
Model Selection and Key Data
Table 1: Type survey
Output
voltage
V
o nom
[V]
12
12
15
3
15
3
24
24
36
36
48
48
1
2
3
Output
current
I
o nom
[A]
9
12
9
12
9
12
9
12
9
12
Input
voltage range
V
i
[V]
1
18 - 144
18 - 144
22 - 144
22 - 144
31 - 144
31 - 144
44 - 144
44 - 144
58 - 144
58 - 144
Input
voltage
V
i nom
[V]
60
60
60
60
60
60
80
80
80
80
Efficiency
2
Type
designation
PSS 129-7
PSK 1212-7
PSS 129-7
PSK 1212-7
PSS 249-7
PSK 2412-7
PSS 369-7
PSK 3612-7
PSS 489-7
PSK 4812-7
Options
h
min
[%]
h
typ
[%]
90
90
90
90
93
93
95
95
96
96
91
91
92
92
94
94
96
96
97
97
B, B1
-9
E
P
C
Surges up to 156 V for 2 s. See also:
Electrical Input Data:
D
V
io min
.
Efficiency at
V
i nom
and
I
o nom
.
Output set to 15 V at R control input
Non standard input/output configurations or special custom adaptions are available on request.
Part Number Description and Product Marking
Type Key
PSK 12 12 -7 E P C B
Positive switching regulator in case S01, K01 .. PSS, PSK
Nominal output voltage in volt .............................. 12, ...48
Nominal output current in ampere ............................ 9, 12
Operational ambient temperature range
T
A
–25 to 71°C ................................................ -7
–40 to 71°C (option) .................................. -9
Options:
Inrush current limitation ............................... E
Potentiometer
1
............................................ P
Thyristor crowbar ........................................ C
Cooling plate large/small ..................... B, B1
1
Option P excludes R-features and vice versa.
Example:
PSS 129-7EPCB = A positive switching regulator with a 12 V, 9 A output, ambient temperature range of
–25 to 71°C, inrush current limitation, potentiometer, crowbar and large cooling plate B.
Specific type designation, input voltage range, nominal
output voltage and current, protection degree, batch no.,
serial no. and data code including production site,
modification status and date of production.
Note:
All units feature the following auxiliary functions
which are not shown in the type designation: Input filter, in-
hibit, R control, sense lines, current sharing and test jacks.
Produkt Marking
Basic type designation, applicable safety approvals and
recognition marks, warnings, pin allocation, Power-One
patents and company logo, identification of LED, test
sockets and optional potentiometer.
REV. FEB. 25 2004
Page 2 of 18
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
Functional Description
The switching regulators are designed using the buck con-
verter topology. The input is not electrically isolated from
the output. During the on period of the switching transistor,
current is transferred to the output and energy is stored in
the output choke. During the off period, this energy forces
the current to continue flowing through the output chocke
to the load and back through the freewheeling diode.
Regulation is accomplished by varying on/off duty cycle.
These regulators are ideal for a wide range of
applications, where input to output isolation is not
necessary, or where already provided by an external front
end (e.g. a transformer with rectifier). To optimise
customer’s needs, additional options and accessories are
available.
03024
4
I
o
Vo+
Vi+
32
Option E
I
i
30
6
20
S+
Input Filter
22
CS
V
i
Option C
Control
circuit
14
i
16
R
18
S–
V
o
26
Gi–
28
24
8
10
Go–
Option P
Fig. 1
Block diagram
+
–
Electrical Input Data
General Conditions:
T
A
= 25°C, unless
T
C
is specified
Table 2a: Input data
Input
Characteristics
Conditions
PSS 129
PSK 1212
min typ max
18
144
6
12
12
50
4.5
B
50
4.5
B
PSS 129
2
PSK 1212
2
min typ max
22
144
7
24
50
4.5
B
mA
A
PSS 249
PSK 2412
min typ max
31
144
7
Unit
VDC
V
i
V
i o
I
i 0
I
inr p
V
i RFI
1
2
Operating input voltage
1
D
V
io min
Min. diff. voltage
V
i
–
V
o
Undervoltage lock-out
No load input current
I
o
= 0 -
I
o nom
T
C min
-
T
C max
I
o
= 0,
V
i min
-
V
i max
Peak value of inrush current
V
i nom
, with option E
Input RFI level, EN 55011/22
V
i nom
,
I
o nom
0.15 - 30 MHz
Surges up to 156 V for 2 s.
Output set to 15 V at R control input, see
Auxiliary Functions.
REV. FEB. 25 2004
Page 3 of 18
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
Table 2b: Input data
Input
Characteristics
Conditions
PSS 369
PSK 3612
min typ max
44
144
8
36
48
50
6
B
50
6
B
mA
A
PSS 489
PSK 4812
min typ max
58
144
10
Unit
V
V
i
V
i o
I
i 0
I
inr p
V
i RFI
1
2
Operating input voltage
D
V
io min
Min. diff. voltage
V
i
–
V
o
Undervoltage lock-out
No load input current
I
o
= 0 -
I
o nom
T
C min
-
T
C max
I
o
= 0,
V
i min
-
V
i max
Peak value of inrush current
V
i nom
, with option E
Input RFI level, EN 55011/22
V
i nom
,
I
o nom
0.15 - 30 MHz
Surges up to 156 V for 2 s (complying to LES-DB standard for U
N
= 110 V).
Output set to 15 V at R control input, see
Auxiliary Functions.
Input Filter and Fuse
An input filter and a fuse are incorporated in all modules as
standard. The filter reduces emitted electrical noise and
prevents oscillations caused by the negative input imped-
ance characteristic of a switched mode regulator. The input
fuse protects against severe defects.
The maximum permissible additionally superimposed rip-
ple
v
i
of the input voltage (rectifier mode) at a specified in-
put frequency
f
i
has the following values:
Inrush Current
Depending on the input source and the input impedance,
the inrush current into the regulator may peak several thou-
sand amperes during the switch-on sequence. It also deter-
mine the rating of input devices such as switches, relays,
fuses etc. To protect these input devices by limiting the peak
of the inrush current we recommend the use of the active
inrush current limitation circuit, option E.
v
i max
= 10 V
pp
at 100 Hz, or V
pp
= 1000 Hz/f
i
• 1 V
Electrical Output Data
General Conditions:
–
T
A
= 25°C, unless
T
C
is specified
– With R control output voltage
V
o
=
V
o nom
at
I
o nom
– Sense lines connected at female connector
Table 3a: Output data
Output
Characteristics
Conditions
PSS 129
min
11.93
0
9.0
25
29
40
30
140
60
±3
±0.02
typ
max
12.07
9.0
11.25
50
54
70
50
PSS 129
3
min
14.91
0
9.0
30
34
50
40
140
60
±4
±0.02
typ
max
15.09
9.0
11.25
60
64
80
60
PSS 249
min
23.86
0
9.0
35
39
80
50
180
60
±5
±0.02
µs
mV/K
%/K
typ
max
24.14
9.0
11.25
60
65
170
120
mV
mV
pp
Unit
V
A
V
o
I
o
I
oL
v
o
Output voltage
Output current
1
V
i nom
,
I
o nom
V
i min
-
V
i max
T
C min
-
T
C max
V
i nom
,
I
o nom
IEC/EN 61204
2
BW = 20 MHz
V
i min
-
V
i max
,
I
o nom
V
i nom
,
I
o
= 0 -
I
o nom
V
i nom
I
o nom
↔
1
/
3
I
o nom
IEC/EN 61204
2
V
i min
-
V
i max
I
o
= 0 -
I
o nom
Output current limitation
response
Output
voltage
noise
Switching freq.
Total
D
V
o U
D
V
o l
Static line regulation
Static load regulation
Dynamic
load
regulation
Voltage deviat.
Recovery time
v
o d
t
d
a
Uo
Temperature coefficient
D
V
o
/DT
C
(T
C min
-
T
C max
)
1
2
3
See also:
Thermal Consideration.
See:
Technical Information: Measuring and Testing.
Output set to 15 V at R control input, see:
Auxiliary Functions.
REV. FEB. 25 2004
Page 4 of 18
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
Table 3b: Output data
Output
Characteristics
Conditions
PSS 369
min
35.78
0
9.0
35
39
120
60
200
70
±8
±0.02
typ
max
35.22
9.0
11.25
60
64
250
120
PSS 489
min
47.71
0
9.0
35
39
150
70
200
70
±10
±0.02
µs
mV/K
%/K
typ
max
48.29
9.0
11.25
60
64
350
150
mV
mV
pp
Unit
V
A
V
o
I
o
I
oL
v
o
Output voltage
Output current
1
V
i nom
,
I
o nom
V
i min
-
V
i max
T
C min
-
T
C max
Output current limitation
response
Output
voltage
noise
Switching freq.
V
i nom
,
I
o nom
IEC/EN 61204
2
Total
BW = 20 MHz
D
V
o U
D
V
o l
Static line regulation
Static load regulation
Dynamic
load
regulation
V
i min
-
V
i max
,
I
o nom
V
i nom
,
I
o
= 0 -
I
o nom
v
o d
t
d
a
Uo
Voltage deviat.
V
i nom
I
↔
1
/
3
I
o nom
Recovery time
o nom
IEC/EN 61204
2
Temperature coefficient
D
V
o
/DT
C
(T
C min
-
T
C max
)
V
i min
-
V
i max
I
o
= 0 -
I
o nom
Table 3c: Output data
Output
Characteristics
Conditions
PSK 1212
min
11.93
0
12.0
25
29
40
30
140
60
±3
±0.02
typ
max
12.07
12.0
15.0
50
54
70
50
PSK 1212
3
min
14.91
0
12.0
30
34
50
40
140
60
±4
±0.02
typ
max
15.09
12.0
15.0
60
64
80
60
PSK 2412
min
23.86
0
12.0
35
39
80
50
180
60
±5
±0.02
µs
mV/K
%/K
typ
max
24.14
12.0
15.0
60
65
170
120
mV
mV
pp
Unit
V
A
V
o
I
o
I
oL
v
o
Output voltage
Output current
1
V
i nom
,
I
o nom
V
i min
-
V
i max
T
C min
-
T
C max
V
i nom
,
I
o nom
IEC/EN 61204
2
BW = 20 MHz
V
i min
-
V
i max
,
I
o nom
V
i nom
,
I
o
= 0 -
I
o nom
V
i nom
I
o nom
↔
1
/
3
I
o nom
IEC/EN 61204
2
V
i min
-
V
i max
I
o
= 0 -
I
o nom
Output current limitation
response
Output
voltage
noise
Switching freq.
Total
D
V
o U
D
V
o l
Static line regulation
Static load regulation
Dynamic
load
regulation
Voltage deviat.
Recovery time
v
o d
t
d
a
Uo
Temperature coefficient
D
V
o
/DT
C
(T
C min
-
T
C max
)
1
2
3
See also:
Thermal Consideration.
See:
Technical Information: Measuring and Testing.
Output set to 15 V at R control input, see:
Auxiliary Functions.
REV. FEB. 25 2004
Page 5 of 18
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