PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 1 of 18
Input volta ge up to 144 VDC
Single output of 12 to 48 VD C
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
•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
Table of Contents Page
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
Page
Electromagnetic Compatibility (EMC) ............................. 9
Immunity to Environmental Conditions ......................... 10
Mechanical Data ........................................................... 11
Safety and Installation Instructions................................13
Description of Options ................................................... 1 5
Accessories ................................................................... 17
EC Declaration of Conformity........................................ 1 8
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 vir tually 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).
Safety according to IEC/EN 60950, UL 1950
168
6.6"
80
3.2"
16 TE
111
4.4"
3 U
168
6.6"
60
2.4"
12 TE
111
4.4"
3 U
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 2 of 18
Model Selection and Key Data
Table 1: Type survey
Output Output Input Input Efficiency 2 Type Options
voltage current voltage range voltage designation
V
o nom [V]
I
o nom [A]
V
i [V] 1
V
i nom [V] hh
hh
hmin [%] hh
hh
htyp [%]
12 9 18 - 144 60 90 91 PSS 129-7 B, B1
12 12 18 - 144 60 90 91 PSK 1212-7 - 9
15 3 9 22 - 144 60 90 92 PSS 129-7 E
15 3 12 22 - 144 60 90 92 PSK 1212-7 P
24 9 31 - 144 60 93 9 4 PSS 249-7 C
24 12 31 - 144 60 93 94 PSK 2412-7
36 9 44 - 144 80 95 9 6 PSS 369-7
36 12 44 - 144 80 95 96 PSK 3612-7
48 9 58 - 144 80 96 9 7 PSS 489-7
48 12 58 - 144 80 96 97 PSK 4812-7
1Surges up to 156 V for 2 s. See also:
Electrical Input Data:
D
V
io min
.
2Efficiency at
V
i nom and
I
o nom.
3Output set to 15 V at R control input
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
1Option 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.
Non standard input/output configurations or special custom adaptions are available on request.
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.
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.
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 3 of 18
Electrical Input Data
General Conditions:
T
A = 25°C, unless
T
C is specified
Table 2a: Input data
Input PSS 129 PSS 129 2 PSS 249
PSK 1212 PSK 1212 2 PSK 2412
Characteristics Conditions min typ max min typ max min typ max Unit
V
iOperating input voltage 1
I
o = 0 -
I
o nom 18 144 22 144 31 144 VDC
D
V
io min Min. diff. voltage
V
i –
V
o
T
C min -
T
C max 677
V
i o Undervoltage lock-out 12 12 24
I
i 0 No load input current
I
o = 0,
V
i min -
V
i max 50 50 50 mA
I
inr p Peak value of inrush current
V
i nom, with option E 4.5 4.5 4.5 A
V
i RFI Input RFI level, EN 55011/22
V
i nom,
I
o nom BBB
0.15 - 30 MHz
1Surges up to 156 V for 2 s.
2Output set to 15 V at R control input, see
Auxiliar y Functions
.
Control
circuit
Go–
Vo+
Gi–
Vi+
R
i
I
o
V
o
I
i
V
i
03024
Input Filter
S+
CS
S–
Option P
Option C
Option E
+–
4
6
20
22
14
16
18
8
10
30
32
26
28
24
Fig. 1
Block diagram
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.
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 4 of 18
Table 2b: Input data
Input PSS 369 PSS 489
PSK 3612 PSK 4812
Characteristics Conditions min typ max min typ max Unit
V
iOperating input voltage
I
o = 0 -
I
o nom 44 144 58 144 V
D
V
io min Min. diff. voltage
V
i –
V
o
T
C min -
T
C max 810
V
i o Undervoltage lock-out 36 48
I
i 0 No load input current
I
o = 0,
V
i min -
V
i max 50 50 mA
I
inr p Peak value of inrush current
V
i nom, with option E 6 6 A
V
i RFI Input RFI level, EN 55011/22
V
i nom,
I
o nom BB
0.15 - 30 MHz
1Surges up to 156 V for 2 s (complying to LES-DB standard for UN = 110 V).
2Output set to 15 V at R control input, see
Auxiliar y 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:
v
i max = 10 Vpp at 100 Hz, or Vpp = 1000 Hz/
f
i • 1 V
Inrush Current
Depending on the input source and the input impedance,
the inrush current into the regulator may peak sev er al 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 b y limiting the peak
of the inrush current we recommend the use of the active
inrush current limitation circuit, option E.
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 PSS 129 PSS 129 3 PSS 249
Characteristics Conditions min typ max min typ max min typ max Unit
V
oOutput voltage
V
i nom,
I
o nom 11.93 12.07 14.91 15.09 23.86 24.14 V
I
oOutput current 1
V
i min -
V
i max 09.009.009.0A
I
oL Output current limitation
T
C min -
T
C max 9.0 11.25 9.0 11.25 9.0 11.25
response
v
oOutput Switching freq.
V
i nom,
I
o nom 25 50 30 60 35 60 mVpp
voltage Total IEC/EN 61204 2 29 54 34 64 39 65
noi se BW = 20 MHz
D
V
o U Static line regulation
V
i min -
V
i max,
I
o nom 40 70 50 80 80 170 mV
D
V
o l Static load regulation
V
i nom,
I
o = 0 -
I
o nom 30 50 40 60 50 120
v
o d Dynamic Voltage deviat.
V
i nom 140 140 180
t
dload Recovery time
I
o nom ↔ 1/3
I
o nom 60 60 60 µs
regulation IEC/EN 61204 2
aUo Temperature coefficient
V
i min -
V
i max ±3 ±4 ±5 mV/K
D
V
o/D
T
C (
T
C min -
T
C max)
I
o = 0 -
I
o nom ±0.02 ±0.02 ±0.02 %/K
1See also:
Thermal Consideration.
2See:
Technical Infor mation: Measuring and Testing.
3Output set to 15 V at R control input, see:
Auxiliar y Functions.
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 5 of 18
Table 3b: Output data
Output PSS 369 PSS 489
Characteristics Conditions min typ max min typ max Unit
V
oOutput voltage
V
i nom,
I
o nom 35.78 35.22 47.71 48.29 V
I
oOutput current 1
V
i min -
V
i max 0 9.0 0 9.0 A
I
oL Output current limitation
T
C min -
T
C max 9.0 11.25 9.0 11.25
response
v
oOutput Switching freq.
V
i nom,
I
o nom 35 60 35 60 mVpp
voltage Total IEC/EN 61204 2 39 64 39 64
noi se BW = 20 MHz
D
V
o U Static line regulation
V
i min -
V
i max,
I
o nom 120 250 150 350 mV
D
V
o l Static load regulation
V
i nom,
I
o = 0 -
I
o nom 60 120 70 150
v
o d Dynamic Voltage deviat.
V
i nom 200 200
t
dload Recovery time
I
o nom ↔ 1/3
I
o nom 70 70 µs
regulation IEC/EN 61204 2
aUo Temperature coefficient
V
i min -
V
i max ±8 ±10 mV/K
D
V
o/D
T
C (
T
C min -
T
C max)
I
o = 0 -
I
o nom ±0.02 ±0.02 %/K
Table 3c: Output data
O ut p ut PSK 1212 PSK 1212 3 PSK 2412
Characteristics Conditions min typ max min typ max min typ max Unit
V
oOutput voltage
V
i nom,
I
o nom 11.93 12.07 14.91 15.09 23.86 24.14 V
I
oOutput current 1
V
i min -
V
i max 0 12.0 0 12.0 0 12.0 A
I
oL Output current limitation
T
C min -
T
C max 12.0 15.0 12.0 15.0 12.0 15.0
response
v
oOutput Switching freq.
V
i nom,
I
o nom 25 50 30 60 35 60 mVpp
voltage Total IEC/EN 61204 2 29 54 34 64 39 65
noi se BW = 20 MHz
D
V
o U Static line regulation
V
i min -
V
i max,
I
o nom 40 70 50 80 80 170 mV
D
V
o l Static load regulation
V
i nom,
I
o = 0 -
I
o nom 30 50 40 60 50 120
v
o d Dynamic Voltage deviat.
V
i nom 140 140 180
t
dload Recovery time
I
o nom ↔ 1/3
I
o nom 60 60 60 µs
regulation IEC/EN 61204 2
aUo Temperature coefficient
V
i min -
V
i max ±3 ±4 ±5 mV/K
D
V
o/D
T
C (
T
C min -
T
C max)
I
o = 0 -
I
o nom ±0.02 ±0.02 ±0.02 %/K
1See also:
Thermal Consideration.
2See:
Technical Infor mation: Measuring and Testing.
3Output set to 15 V at R control input, see:
Auxiliary Functions.
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 6 of 18
Table 3d: OVtpVt data
O ut put PSK 3612 PSK 4812
Characteristics Conditions min typ max min typ max Unit
V
oOutput voltage
V
i nom,
I
o nom 35.78 36.22 47.71 48.29 V
I
oOutput current 1
V
i min -
V
i max 0 12.0 0 12.0 A
I
oL Output current limitation
T
C min -
T
C max 12.0 15.0 12.0 15.0
response
v
oOutput Switching freq.
V
i nom,
I
o nom 35 60 35 60 mVpp
voltage Total IEC/EN 61204 2 39 64 39 64
noi se BW = 20 MHz
D
V
o U Static line regulation
V
i min -
V
i max,
I
o nom 120 250 150 350 mV
D
V
o l Static load regulation
V
i nom,
I
o = 0 -
I
o nom 60 120 70 150
v
o d Dynamic Voltage deviat.
V
i nom 200 200
t
dload Recovery time
I
o nom ↔ 1/3
I
o nom 70 70 µs
regulation IEC/EN 61204 2
aUo Temperature coefficient
V
i min -
V
i max ±8 ±10 mV/K
D
V
o/D
T
C (
T
C min -
T
C max)
I
o = 0 -
I
o nom ±0.02 ±0.02 %/K
1 See also:
Thermal Consideration.
2 See:
Technical Information: MeasVring and Testing.
3 Output set to 15 V at R control input, see:
Auxiliary Functions.
Overtemperature Protection
The unit is self-protecting by an internal temperature moni-
tor , which inhibits the output abov e
T
C max. The output is au-
tomatically enabled again after temperature has dropped
below
T
C max.
Output Protection
A voltage suppressor diode which in worst case conditions
fails into a short circuit, protects the output against an inter-
nally generated ov ervoltage . Such an o verv oltage could oc-
cur due to a failure of either the control circuit or the s witch-
ing transistor. The output protection is not designed to with-
stand externally applied over voltages. The user should en-
sure that systems with Power-One power supplies, in the
event of a failure, do not result in an unsafe condition (fail-
safe).
Fig. 2
Dynamic load regulation.
I
o/
I
o nom
1
V
od
V
od
t
d
t
d
D
V
o I
D
V
o I
t
V
o
0
t
≥10 µs
≥10 µs
05010
Thermal Considerations
When a switching regulator is located in free , quasi-station-
ary air (convection cooling) at a temper ature
T
A = 71°C and
is operated at its nominal output current
I
o nom, the case
temperature
T
C will be about 95°C after the warm-up
phase, measured at the:
MeasVring point of case tempera-
tVre T
C (see:
Mechanical Data
).
Under practical operating conditions, the ambient tem-
perature
T
A may exceed 71 °C, provided additional meas-
ures (heat sink, fan, etc.) are taken to ensure that the case
temperature
T
C does not exceed its maximum value of
95°C.
Example: Sufficient forced cooling allows
T
A max = 85°C. A
simple check of the case temperature
T
C (
T
C ≤95°C) at full
load ensures correct operation of the system.
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
50 60 70 80 90 100
I
o
/
I
o nom
T
A
[˚C
]
0.9
1.0 Forced cooling
05031
T
A min
T
C max
Convection cooling
Fig. 3
Output current derating versus temperature.
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 7 of 18
1.2
1.0
0.8
0.6
0.4
00.2 0.4 1.0 1.2
0.2
0.6 0.8 1.4
V
o/
V
o nom
I
o/
I
o nom
I
o no
m
I
o L
05038
Fig. 4
Overload, short-circuit behaviour V
o
versus I
o.
Parallel and Series Connection
Outputs of equal nominal voltages can be parallel-con-
nected. Use the current sharing f eature (CS) f or e v en distri-
bution of the output current. See also:
Auxiliary Functions.
Outputs can be series-connected with any other module. In
series-connection the maximum output current is limited by
the lowest current limitation. Electr ically separated source
voltages are needed for each module!
Short Circuit Behaviour
A constant current limitation circuit holds the output current
almost constant whenever an overload or a shor t circuit is
applied to the regulator's output. It acts self-protecting and
recovers – in contrary to the fold back method – automati-
cally after remov al of the o verload or short circuit condition.
i Inhibit (Remote On / Off)
Note: With open i input, output is enabled (
V
o = on)
The inhibit input allows the switching regulator output to be
disabled via a control signal. In systems with several units,
this feature can be used, for e xample, to control the activa-
tion sequence of the regulators by a logic signal (TTL, C-
MOS, etc.). An output voltage ov ershoot will not occur when
switching on or off. The inhibit characteristics are refer-
enced to the S– remote sense terminal.
Vi+
Gi– S–
i
S+
I
inh
V
inh
06047
Fig. 6
Definition of I
inh
and V
inh
Auxiliary Functions
S Sense Lines
Note: Sense lines should always be connected! It is rec-
ommended to connect the sense lines directly at the
female connector. See also:
Technical Infor mation.
This feature enables compensation of voltage drop across
the connector contacts and the load lines. In case the sense
lines are connected at the load rather than directly at the
connector, the user must ensure that
V
o max (between Vo+
and Go–) is not exceeded.
Applying generously dimensioned cross-section load leads
av oids troublesome v oltage drop . To minimize noise pick-up
wire sense lines in parallel or twisted.
To ensure correct operation, both sense lines m ust be con-
nected to their respective power output potential. The volt-
age difference between any sense line and its respective
power output pin (as measured on the connector) should
not exceed the values given in the following table.
Table 4: MaximVm allowed voltage compensation
Nominal output Total voltage difference Voltage difference
voltage between both sense lines between
and their respective output Go– and S–
12 - 48 V <1.0 V <0.25 V
Fig. 5
Sense lines connection
Vi+
i
R
CS
Gi–
Vo+
S+
S–
Go–
Load
06046
Fig. 7
Typical inhibit current I
inh
versus inhibit voltage V
inh
4
2
0
–50 –40 20 40
–30 0
–20 –10 10 30 50
5
3
1
I
inh
[mA]
V
inh
[V]
V
o
on
V
o
off
V
inh
= 0.8 V
V
inh
= 2.4 V
06034
0
t
t
0
Inhibit
1
0.1
1
V
o
/
V
o nom
t
r
t
f
06001
Fig. 8
Output response as a function of inhibit signal
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 8 of 18
Table 5: Inhibit characteristics
Characteristics Conditions min typ max Unit
V
inh Inhibit input voltage to keep
V
o = on
V
i min -
V
i max –50 +0.8 VDC
regulator output voltage -
V
o = off
T
C min -
T
C max +2.4 +50
t
r Switch-on time after inhibit command
V
i =
V
i nom 150 ms
t
f Switch-off time after inhibit command
R
L =
V
o nom /
I
o nom 30
I
i inh Input current when inhibited
V
i =
V
i nom 25 mA
R Control for Output Voltage Adjustment
Note: With open R input,
V
o ≈
V
o nom.
The output voltage
V
o can either be adjusted with an e xter-
nal reference voltage (
V
ext) or with an exter nal resistor (
R
1
or
R
2). The adjustment r ange is 0
- V
o max. The minimum dif-
ferential voltage D
V
io min between input and output (see:
Electrical Input Data
) should be maintained. Undervoltage
lock-out = minimum input voltage.
S+
R
+
4000 Ω
V
ref
V
ext
–
+
S–
06048
S+
R–
+
4000 Ω
U
ref
R
1
R
2
S–
06049
Fig. 9
Voltage adjustment with V
ext
between R and S–
a)
V
o = 0 -
V
o max, using
V
ext between R and S–:
V
o
V
ext
V
ext ≈ 2. 5 V • –––––
V
o ≈
V
o nom • –––––
V
o nom 2.5 V
Fig. 10
Voltage adjustment with external resistor R
1
or R
2
b)
V
o = 0 - 100%
V
o nom, using
R
1 between R and S–:
4000 Ω •
V
o
V
o nom •
R
1
R
1 ≈–––––––––––
V
o ≈–––––––––––
V
o nom –
V
o
R
1 + 4000 Ω
c)
V
o =
V
o nom -
V
o max, using
R
2 between R and S+:
4000 Ω •
V
o • (
V
o nom – 2.5 V)
R
2 ≈––––––––––––––––––––––––
2.5 V • (
V
o –
V
o nom)
V
o nom • 2.5 V •
R
2
V
o ≈––––––––––––––––––––––––––––––––
2.5 V • (
R
2 + 4000 Ω) –
V
o nom • 4000 Ω
Caution: To prev ent damage
V
ext should not e xceed 20 V,
nor be negative, and
R
2 should never be less than 47 kΩ.
Table 6: Maximum adjustable output voltage
Characteristics Conditions PSS 129 PSS 249 PSS 369 PSS 489
PSK 1212 PSK 2412 PSK 3612 PSK 4812
min typ max min typ max min typ max min typ max Unit
V
o max Maximum adjustable
V
i nom,
I
o nom 16.0 26.0 42.5 52.8 V
output at R control input
CS Current Sharing
For parallel operation of several modules, interconnecting
all CS pins ensures that the output currents are evenly dis-
tributed. This feature improves transient load performance
and increases system reliability. All paralleled units should
be supplied by equal input voltage (
V
i) and
interconnecting leads should have equal length and cross
section to ensure equal voltage drop.
Test Sockets
Test sockets (pin ∅ = 2 mm) for measur ing the output volt-
age
V
o internally at the cxonnector terminals, are located at
the front side of the module. The test sockets are protected
by a series resistor.
LED Output Voltage Indicator
A green output indicator LED shines when the output volt-
age is present.
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 9 of 18
Electromagnetic Compatibility (EMC)
Electromagnetic Immunity
General condition: Case not earthed.
Table 7: Immunity type tests
Phenomenon Standard 1 Class Coupling Value Waveform Source Test In Per-
Level mode 2 applied Imped. procedure oper. form. 3
1 MHz burst IEC III i/o, i/c, o/c 2500 Vp400 damped 200 Ω2 s per y e s A
disturbance 60255-22-1 +i/–i, +o/–o 1000 Vp1 MHz waves/s coupling mode
Voltage surge IEC 60571-1 i/c, +i /–i 800 Vp100 µs 100 Ωyes B
1500 Vp50 µs 1 pos. and 1 neg.
voltage surge per
coupling mode
3000 Vp5 µs
4000 Vp1 µs
7000 Vp100 ns
Electrostatic IEC/EN 4 contact discharge 8000 Vp1/50 ns 330 Ω10 positive and y e s A
discharge 61000-4-2 to case 10 negative
discharges
Electromagnetic IEC/EN 3 antenna 10 V/m AM 80% 80 - 1000 MHz y e s A
field 61000-4-3 1 kHz
Electrical fast IEC/EN 3 i/c, +i/–i 2000 Vpbursts of 5/50 ns 50 Ω60 s positive y es A
transient/burst 61000-4-4 4 4000 Vp5 kHz rep. rate 60 s negative B 4
transients with bursts per
15 ms burst coupling mode
duration and a
300 ms period
Surge IEC/EN 3 i/c 2000 Vp1.2/50 µs 12 Ω5 pos. and 5 neg. yes A
61000-4-5 +i/–i 1000 Vp2 Ωsurges per
coupling mode
Conducted IEC/EN 3 i, o, signal wires 10 VAC AM 80% 150 Ω0.15 - 80 MHz y e s A
disturbances 61000-4-6 (140 dBµV) 1 kHz
1For related and previous standards see:
Technical Information: EMC
.2 i = input, o = output, c = case.
3A = Normal operation, no deviation from specifications, B = Normal operation, temporary deviation from specs possible.
4With option C, manual reset might be necessary.
Electromagnetic Emission
For emission levels refer to:
Electrical Input Data
.
07022
EN 55022 A
EN 55022 B
90
80
70
60
50
40
30
20
10
0
0.01
0.05
0.1
0.5
1
2
5
10
20
30
[dBµV]
MH
z
0.02
Fig. 11
Typical disturbance voltage (quasi-peak) at the input
according to EN 55011/22 measured at V
i nom
and I
o nom
.
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 10 of 18
Immunity to En vir onmental Conditions
Table 8: Mechanical stress
Test Method Standard Test Conditions Status
Ca Damp heat IEC/DIN IEC 60068-2-3 Temperature: 40 ±2 °C Unit not
steady state MIL-STD-810D section 507.2 Relative humidity: 93 +2/-3 % operating
Duration: 56 days
Ea Shock IEC/EN/DIN EN 60068-2-27 Acceleration amplitude: 100 gn = 981 m/s2Unit
(half-sinusoidal) MIL-STD-810D section 516.3 Bump duration: 6 ms operating
Number of bumps: 18 (3 each direction)
Eb Bump IEC/EN/DIN EN 60068-2-29 Acceleration amplitude: 40 gn = 392 m/s2Unit
(half-sinusoidal) MIL-STD-810D section 516.3 Bump duration: 6 ms operating
Number of bumps: 6000 (1000 each direction)
Fc Vibration IEC/EN/DIN EN 60068-2-6 Acceleration amplitude: 0.35 mm (10 - 60 Hz) Unit
(sinusoidal) MIL-STD-810D section 514.3 5 gn = 49 m/s2 (60 - 2000 Hz) operating
Frequency (1 Oct/ min): 10 - 2000 Hz
Test duration: 7.5 h (2.5 h each axis)
Fda Random vibration IEC 60068-2-35 Acceleration spectral density: 0.05 g2/Hz Unit
wide band DIN 40046 part 23 Frequency band: 20 - 500 Hz operating
Reproducibility Acceleration magnitude: 4.9 grms
high Test duration: 3 h (1 h each axis)
Kb Salt mist, cyclic IEC/EN/DIN IEC 60068-2-52 Concentration: 5% (30°C) Unit not
(sodium chloride Duration: 2 h per cycle operating
NaCl solution) Storage: 40°C , 93% rel. humidity
Storage duration: 22 h per cycle
Number of cycles: 3
Table 9: Temperature specifications, valid for an air pressure of 800 - 1200 hPa (800 - 1200 mbar)
Temperature Standard -7 Option -9
Characteristics Conditions min max min max Unit
T
AAmbient temperature 1 Operational 2 –25 71 –40 71 °C
T
CCase temperature –25 95 –40 95
T
SStorage temperature 1 Non operational –4 0 100 – 5 5 100
1MIL-STD-810D section 501.2 and 502.2.
2See:
Thermal Considerations
and
Overtemperature Protection.
Table 10: MTBF and device hoVrs
MTBF Ground Benign Ground Fixed Ground Mobile Device Hours 1
MTBF acc. to MIL-HDBK-217F
T
C = 40°C
T
C = 40°C
T
C = 70°C
T
C = 50°C
335'000 h 138'000 h 35'000 h 33'000 h 2'100'000 h
1Statistical values, based on an average of 4300 working hours per year and in general field use
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 11 of 18
European
Projection
111 ±0.5
168.5 ±0.5 60
3.27
7 TE 5 TE
25.9
Front plate Main face
171.9
50
11.8
76
50.5
Measuring point of
case temperature
T
C
4 x M4
09028
8
5
103
30.3
27.38
7.8
13.3
30.5
51.5
10.34
7.4
17.8
20.34
Potentiometer
(option P)
Test sockets
LED OK green
d
Mechanical Data
The converters are designed to be inserted into a rack according to IEC 60297-3.
Fig. 12
Case S01, weight 1.3 kg
Aluminium, fully enclosed,black finish and self cooling.
Note:
–d ≥15 mm, recommended minimum distance to next part
to ensure proper air circulation at full output power.
– free air locations: the module should be mounted with
fins in vertical position to achieve a maximum air flow
through heat sink.
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 12 of 18
159 4.5
89
168.5 d
80
6.5
3.27
7 TE 9 TE
25.9
Front plate Main face Back plate
Measuring point of
case temperature
T
C
171.9
50
11.8
09029
30.3
111
±0.5
103
27.38
7.8
13.3
30.5
51.5
10.34
17.8
20.34
LED OK green
Potentiometer
(option P)
Test sockets
7.4
Fig. 13
Case K01, weight 1.6 kg
Aluminium, fully enclosed, black finish and self cooling.
Note:
–d ≥15 mm, recommended minimum distance to next part
to ensure proper air circulation at full output powe r.
– free air locations: the module should be mounted with
fins in vertical position to achieve a maximum air flow
through heat sink.
Mechanical Data
The converters are designed to be inserted into a rack according to IEC 60297-3.
European
Projection
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 13 of 18
Standards and Approvals
All switching regulators are UL recognized according to
UL 60950, CAN/CSA C22.2 No. 234-M90 and IEC/EN
60950.
The units have been evaluated for:
• Building in
• Operational insulation from input to output and input/out-
put to case
• The use in a pollution degree 2 environment
• Connecting the input to a secondary circuit which is sub-
ject to a maximum transient rating of 1500 V
The switching regulators are subject to manufacturing sur-
veillance in accordance with the above mentioned UL,
CSA and ISO 9001 standards.
Safety of Operator Accessible Output Circuit
If the output circuit of a switching regulator is operator-ac-
cessible, it shall be an SELV circuit according to IEC/EN
60950 related safety standards.
The following table shows some possible installation con-
figurations, compliance with which causes the output circuit
of the switching regulator to be an SELV circuit according to
IEC/EN 60950 up to a configured nominal output voltage of
30 V, or 48 V if option C is fitted.
However, it is the sole responsibility of the installer or user
to assure the compliance with the relevant and applicable
safety regulations.
Installation Instruction
Installation of the switching regulators must strictly follow
the national safety regulations in compliance with the enclo-
sure, mounting, creepage, clearance, casualty, markings
and segregation requirements of the end-use application.
Check for hazardous voltages before altering any con-
nections.
The input and the output circuit are not separated. i.e. the
negative path is internally interconnected!
The units should be connected to a secondary circuit. Do
not open any module. Ensure that a unit failure (e.g. by an
internal short-circuit) does not result in a hazardous condi-
tion. See also
:Safety of operator accessible output circuit.
Note: Additional information on input circuitry, grounding
and parallel operation of units is given in:
Technical Infor-
mation: Application Notes.
Protection Degree
The protection degree is IP 30 (equipped with option P: IP
20). It applies only if the module is plugged-in or the female
connector is properly attached to the module.
Isolation
Electric strength test voltage between input interconnected
with output and case: 1500 VDC , 1 s. This test is perf ormed
in the factory as routine test in accordance with IEC/EN
60950 and UL 60950 and should not be repeated in the
field. Power-One will not honour any guarantee claims re-
sulting from electric strength field tests.
Table 11: H15 connector pin allocation
Electrical Determination Type H15
Pin No. Ident.
Output voltage (positive) 4 Vo+
Output voltage (positive) 6 Vo+
Output voltage (negative) 8 Go–
Output voltage (negative) 10 Go–
Crowbar trigger input (option C) 12 n.c.
Inhibit input 14 i
R-input (output voltage programming) 16 R
Sense line (negative) 18 S–
Sense line (positive) 20 S+
Current sharing control input 22 CS
Protective ground (leading pin) 24
Input voltage (negative) 26 Gi–
Input voltage (negative) 28 Gi–
Input voltage (positive) 30 Vi+
Input voltage (positive) 32 Vi+
432
10008
Fixtures for connector retension
clips V (see
Accessories
)
Safety and Installation Instructions
Connector Pin Allocation
The connector pin allocation table defines the electrical
potentials and the physical pin position on the connector.
Pin 24 (protective earth) is a leading pin, which provides
electrical contact first. The modules should only be wired
via the female connector H15 (according to DIN 41612) to
ensure requested safety !
Fig. 14
View of male H15 connector
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 14 of 18
Table 12: Insulation concept leading to an SELV output circuit
Conditions Front end Switching regulator Result
Supply Minimum required grade Maximum Minimum required safety Measures to achieve the Safety status of
vol tage of isolation, to be provided DC output status of the front end specified safety status of the the switching
by the AC-DC front end, voltage output circuit output circuit regulator output
including mains supplied from the circuit
battery charger front end 1
Battery Double or Reinforced ≤60 V SEL V circuit None SELV circuit
supply, ≤60 V Earthed hazardous voltage Input fuse 3 and earthed 4 Earthed SELV
considered secondary circuit 2 or non accessible case 5 circuit
as secon- Unearthed hazardous Input fuse 3 and unearthed, Unearthed SELV
dary circuit voltage secondary circuit 5 non accessible case 5 circuit
Hazardous voltage Input fuse 3 and earthed output Earthed SELV
secondary circuit circuit 4
and earthed 4 or non circuit
accessible case 5
Mains Basic ≤60 V Earthed SELV circuit 4 None
≤250 V A C ELV circuit Input fuse 3 and earthed output
>60 V Hazardous voltage circuit 4
and earthed 4 or non
secondary circuit user accessible case 5
Double or reinforced ≤60 V SELV circuit None SELV circuit
>60 V Double or reinforced insu- Input fuse 3 and unearthed Unear thed SELV
lated unearthed hazardous and non accessible case 5 circuit
voltage secondary circuit 5
1The front end output voltage should match the specified input voltage range of the switching regulator.
2The Gi– terminal of the switching regulator has to be connected to earth by the installer according to the relevant safety standard,
e.g. IEC/EN 60950.
3The installer shall provide an approved fuse (slow blow type with the lowest current rating suitable for the application, max. 12.5 A) in
a non-earthed input conductor directly at the input of the switching regulator. If Vo+ is earthed, insert the fuse in the Gi- line. For UL’s
purpose, the fuse needs to be UL-listed.
4The earth connection has to be provided by the installer according to the relevant safety standard, e.g. IEC/EN 60950.
5Has to be insulated from earth by double or reinforced insulation according to the relevant safety standard, based on the maximum
output voltage from the front end.
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 15 of 18
Description of Options
-9 Extended Temperature Range
This option defines an extended operational ambient tem-
perature range of
T
A = –40 to 71°C .
P Potentiometer
Note: Option P is not recommended, if several modules
are operated in parallel connection.
Option P excludes R function. The output voltage
V
o can be
adjusted with a screwdriver in the range 90 - 110%
V
o nom.
However, the minimum differential voltage ∆
V
iomin
be-
tween input and output as specified in
Electrical Input
Data
should be maintained.
E Inrush Current Limitation
Note: This option requires increased minimum input volt-
age of up to 1 V, dependent upon input range. In battery
driven applications the use of option E is essential due to
very low battery impedances.
Inrush current can reach several thousand amperes de-
pending on the source and input line conditions. Immedi-
ately after application of the input supply, the inrush current
is limited by parasitic components of the voltage source
and power supply input only. The power supply input
presents a very low impedance to such currents and when
driven from a low impedance source, for example a
battery, the inrush current can peak at several orders of
magnitude above the continuous DC input current. Option
E dramatically reduces this peak current and is recom-
mended for any application to protect series elements
such as switches or circuit brakers and rectifiers. After
startup, the resistor is bypassed for normal operation.
Î
[A]
t
[ms]
40 (typical)0 100 (typical)
Normal operation
(15 Ω resistor bypassed)
Soft startInrush limit
Startup
(
I
i
= ––––
)
V
i
15 Ω
11029
Fig. 15
Option E: Inrush current versus time
C Thyristor Crowbar
Note: The th yristor can be deactiv ated by remo v al of the in-
put voltage only. The inhibit signal cannot deactivate the
thyristor.
Option C protects the load against power supply malfunc-
tion. It is not designed to sink external currents.
As a central overvoltage protection device, the crowbar is
usually connected to the external load via distributed in-
ductance of the lines. F or this reason, the overvoltage at the
load can temporarily exceed the trigger voltage
V
o c. D e-
pending on the application, further decentralized overvolt-
age protection elements may have to be used additionally.
A fixed-value monitoring circuit checks the output voltage
V
o and when the trigger v oltage
V
o c is reached, the th yristor
crowbar triggers and disables the output.
An external connection C (crowbar trigger control) is pro-
vided. When crowbar option is used with two or more po wer
supplies in parallel connection, all crowbar trigger terminals
(C) should be interconnected. This ensures all crowbar cir-
cuits triggering simultaneously in order to disable all out-
puts at once. The crowbar trigger voltage is maintained be-
tween Vo+ and Go–. To prevent false triggering, the user
should ensure that
V
o (between Vo+ and Go–) deos not
exceed
V
o c.
Table 13: Crowbar trigger levels
Characteristics Condition PSS 129 PSS 249 PSS 369 PSS 489
PSK 1212 PSK 2412 PSK 3612 PSK 4812
min typ max min typ max min typ max min typ max Unit
V
o c Trigger voltage
T
C min -
T
C max 17.8 18.9 28.89 30.6 47.0 50.0 63.0 67.0 VDC
V
i min -
V
i max 14.3 15.2 1 43.0 45.5 1
t
sDelay time
I
o = 0 -
I
o nom 1.5 1.5 1.5 1.5 µs
1Crowbar trigger voltage with option P
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 16 of 18
B, B1 Cooling Plate
Where a cooling surface is available, a cooling plate
(option B, or option B1) can be used instead of the
standard heatsink. The mounting system must ensure suf-
ficient cooling capacity to guarantee that the maximum
case temperature
T
C max is not exceeded. The required
cooling capacity can be calculated by the following
formula: 100% –
η
P
Loss = –––––––- • (
V
o •
I
o)
η
6.5
11.2
13
140
17.3 133.4 ±0.2 30
168
547.2
38.5
127 6.5
11.8
11027
Fig. 16
Option B, large cooling plate
Weight: 1.2 kg
Fig. 17
Option B1, small cooling plate
Weight: 1.2 kg
111
168 ±0.5
101
158
5
M 4
5
171.9
547.2
38.5 11.8
11028
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 17 of 18
Accessories
A variety of electrical and mechanical accessories are
available including:
– F ront panels f or 19" rac k mounting, Schroff and Intermas
systems, 12 and 16 TE.
– Mating H15 and H15 S4 connectors with screw, solder
fast-on or press-fit terminals.
– Connector retention facilities (V-clips).
– DIN-rail mounting adaptor.
For more detailed information please refer to:
Accessory
Products.
NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not authorized for use as cr itical components in life support
systems, equipment used in hazardous environments, or nuclear control systems without the express written consent of the
respective divisional president of Power-One, Inc.
TECHNICAL REVISIONS - The appearance of products, including safety agency cer tifications pictured on labels, may change
depending on the date manufactured. Specifications are subject to change without notice.
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004 Page 18 of 18
EC Declaration of Conformity
We
Power-One AG
Ackerstrasse 56 CH-8610 Uster
declare under our sole responsibility that all PSx Series switching regulators carrying the
CE-mark are in conformity with the provisions of the Low Voltage Directive (LVD) 73/23/
EEC of the European Communities .
Conformity with the directive is presumed by conformity wih the following harmonized
standards:
•EN 61204: 1995 (= IEC 61204: 1993, modified)
Low-voltage power supply devices, d.c. output - Perfomance character istics
and safety requirements
•EN 60950: 1992 + A1: 1993 + A2 (= IEC 950 second edition 1991 + A1: 1992 +
A2: 1993)
Safety of information technology equipment
The installation instructions given in the corresponding data sheet describe correct installation
leading to the presumption of conformity of the end product with the LVD. All PSx Ser ies
Switching Regulators are components, intended exclusively for inclusion within other
equipment by an industrial assembly oper ation or by professional installers. The y must not
be operated as stand alone products.
Hence conformity with the Electromagnetic Compatibility Directive 89/336/EEC (EMC
Directive) needs not to be declared. Nevertheless, guidance is provided in most product
application notes on how conformity of the end product with the indicated EMC standards
under the responsibility of the installer can be achieved, from which conformity with the
EMC directive can be presumed.
Uster, 1 Sep. 2003
Power-One AG
Rolf Baldauf Johann Milavec
Director Engineering Director Projects and IP
