PSS, PSK Extended Data Sheet
Positive Switching Regulator (Industrial)
Input voltage up to 80 V DC
Single output of 3.3 to 36 V DC
No input to output isolation
•
High efficiency up to 96%
•
Wide input voltage range
• Low input to output differential voltage
•
Very good dynamic properties
•
Input undervoltage lock-out
•
Active current sharing for parallel operation
111
4.4"
3U
60
2.4"
12 TE
168
6.6"
• 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 80 V are specially
designed for secondary switched and battery-driven appli-
cations. The standard case design with heat sink allows op-
eration at nominal load up to 71°C without additional cool-
ing, suitable for 19" rack or chassis mounting.
111
4.4"
3U
80
3.2"
16 TE
168
6.6"
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 according to DIN 41612:
– H15 for output current up to 16 A
– H15 S4 with four high current jacks for output current
≥
20 A
Table of Contents
Page
Page
Electromagnetic Compatibility (EMC) ........................... 10
Immunity to Environmental Conditions ......................... 11
Mechanical Data ........................................................... 12
Safety and Installation Instructions ................................ 14
Description of Options ................................................... 16
Accessories ................................................................... 18
EC Declaration of Conformity ........................................ 19
Summary ......................................................................... 1
Model Selection and Key Data ........................................ 2
Part Number Description ................................................. 2
Functional Description .................................................... 3
Electrical Input Data ........................................................ 3
Electrical Output Data ...................................................... 4
Auxiliary Functions .......................................................... 8
REV. FEB 25, 2004
Page 1 of 19
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Industrial)
Model Selection and Key Data
Table 1: Type survey
Output
voltage
V
o nom
[V]
3.3
5.1
5.1
5.1
5.1
12
12
12
15
4
15
4
15
4
24
24
24
36
36
36
1
2
3
4
Output
current
I
o nom
[A]
25
12
16
20
25
12
16
20
12
16
20
12
16
20
12
16
20
Input
voltage range
V
i
[V]
1
8 - 40
8
8
8
8
-
-
-
-
80
80
80
40
Input
voltage
V
i nom
[V]
20
40
40
40
20
40
40
40
40
40
40
50
50
50
60
60
60
Efficiency
2
Type
designation
PSK 3E25-7
PSS
PSK
PSK
PSK
5A12-7
5A16-7
5A20-7
5A25-7
Connector
type
H15S4
H15
H15
H15 S4
H15 S4
H15
H15
H15 S4
H15
H15
H15 S4
H15
H15
H15 S4
H15
H15
H15 S4
Options
h
min
[%]
h
typ
[%]
81
78
78
78
82
90
89
89
90
89
89
93
93
93
95
94
94
82
79
79
79
82
91
90
90
92
90
90
94
94
94
96
95
95
B, B1
-9
E
P
C
3
15 - 80
15 - 80
15 - 80
19 - 80
19 - 80
19 - 80
29 - 80
29 - 80
29 - 80
42 - 80
42 - 80
42 - 80
PSS 1212-7
PSK 1216-7
PSK 1220-7
PSS 1212-7
PSK 1216-7
PSK 1220-7
PSS 2412-7
PSK 2416-7
PSK 2420-7
PSS 3612-7
PSK 3616-7
PSK 3620-7
See also
Electrical Input Data:
D
V
io min
.
Efficiency at
V
i nom
and
I
o nom
.
Not available for PSK 3E25.
Output set to 15 V at R control input
Part Number Description and Product Marking
PSK 12 20 -7 E P C B
Positive switching regulator in case S01, K01 .. PSS, PSK
Nominal output voltage in volt (3E for 3.3 V) ........ 3E,... 36
Nominal output current in ampere ....................... 12,... 25
Operational ambient temperature range
T
A
–25 to 71°C ................................................ -7
–40 to 71°C (option) .................................. -9
Options:
Inrush current limitation ............................... E
Potentiometer .............................................. P
Thyristor crowbar ........................................ C
Cooling plate large/small .................... B / B1
PSS 1212-7EPCB = A positive switching regulator with a 12 V, 12 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.
Example:
Note:
All units feature the following auxiliary functions
which are not shown in the type designation: Input filter,
inhibit, 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 19
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Industrial)
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 the 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
PSK 3E25
PSK 5A25
Conditions
min typ max
8
40
4.7/2.9
6.5
6.5
50
20
B
50
40
B
PSS 5A12
PSK 5A16
PSK 5A20
min typ max
8
80
2.9
7.3
50
40
B
mA
A
PSS 1212
PSK 1216
PSK 1220
min typ max
15
80
3
Unit
V DC
Characteristics
V
i
V
i o
I
i 0
I
inr p
u
i RFI
1
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
Output set to 15 V at R control input, see:
Auxiliary Functions.
REV. FEB 25, 2004
Page 3 of 19
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Industrial)
Table 2b: Input data
Input
PSS 1212
1
PSK 1216
PSK 1220
Conditions
min typ max
19
80
4
7.3
12
50
40
B
50
50
B
PSS 2412
PSK 2416
PSK 2420
min typ max
29
80
5
19
50
60
B
mA
A
PSS 3612
PSK 3616
PSK 3620
min typ max
42
80
6
Unit
V
Characteristics
V
i
V
i o
I
i 0
I
inr p
u
i RFI
1
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
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 5A12
min
5.07
0
12
20
24
15
10
70
40
±1
±0.02
typ
max
5.13
12
15
40
44
35
25
PSS 1212
min
11.93
0
12.0
20
29
40
30
140
60
±3
±0.02
typ
max
12.07
12
15
45
49
70
50
PSS 1212
3
min
14.91
0
12
30
34
50
35
150
60
±4
±0.02
µs
mV/K
%/K
typ
max
15.09
12
15
50
54
80
55
mV
mV
pp
Unit
V
A
V
o
I
o
I
oL
u
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
u
o d
t
d
a
Uo
Temperature coefficient
D
V
o
/DT
C
(T
C min
to
T
C max
)
1
2
3
See also:
Thermal Considerations.
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 19
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Industrial)
Table 3b: Output data
Output
Characteristics
Conditions
PSS 2412
min
23.86
0
12
30
34
80
50
180
60
±5
±0.02
typ
max
24.14
12
15
60
64
170
120
PSS 3612
min
35.78
0
12
35
39
120
60
200
70
±8
±0.02
µs
mV/K
%/K
typ
max
36.22
12
15
60
64
250
200
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
to
T
C max
)
1
2
3
See also:
Thermal Considerations.
See:
Technical Information: Measuring and Testing.
Output set to 15 V at R control input, see:
Auxiliary Functions.
Table 3c: Output data
Output
Characteristics
Conditions
PSK 3E25
min typ max
3.25
0
25
20
24
15
10
70
40
±1
±0.02
3.35
25
31.3
40
44
35
25
PSK 5A16
min typ max
5.07
0
16
20
24
15
10
70
40
±1
±0.02
5.13
16
20
40
44
35
25
PSK 5A20
min typ max
5.07
0
20
20
24
15
10
70
40
±1
±0.02
5.13
20
25
40
44
35
25
PSK 5A25
min typ max
5.07
0
25
5.13
25
31.3
20 40
24 44
15 35
10 25
70
40
±1
µs
mV/K
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 limit. 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
to
T
C max
)
±0.02 %/K
1
2
3
See also:
Thermal Considerations.
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 19
