PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
REV. OCT 17, 2003 Page 1 of 13
Input voltage up to 144 V DC
Single output of 5.1 to 48 V DC
No input to output isolation
•High efficiency up to 96%
•Extremely wide input voltage range
•Very good dynamic properties
•Input undervoltage lock-out
•External output voltage adjustment and inhibit
•2 temperature ranges
•Continuous no-load and short-circuit proof
•No derating
Table of Contents Page
Summary ......................................................................... 1
Model Selection and Key Data....................................... 1
Part Number Description ................................................ 2
Functional Description .................................................... 2
Electrical Input Data........................................................ 3
Electrical Output Data ..................................................... 4
Auxiliary Functions.......................................................... 6
Page
Electromagnetic Compatibility (EMC) ............................ 8
Immunity to Environmental Conditions .......................... 9
Mechanical Data ........................................................... 10
Safety and Installation Instructions............................... 10
Description of Options .................................................. 12
Accessories ................................................................... 12
EC Declaration of Conformity....................................... 13
Model Selection and Key Data
Table 1: Type survey
Output Output Input Input Efficiency 3 Type Options
voltage current voltage range voltage designation
V
o nom [V]
I
o nom [A]
I
o max [A] 1
V
i [V] 2
V
i nom [V] hh
hh
hmin [%] hh
hh
htyp [%]
5.1 4 5 15 – 144 60 76 80 PSB 5A4-7iR -9, L, P, C
12 3 4 18 – 144 60 87 89 PSB 123-7iR
15 3 4 22 – 144 60 89 90 PSB 153-7iR
24 3 4 31 – 144 60 92 94 PSB 243-7iR
36 3 4 44 – 144 80 94 95 PSB 363-7iR
48 3 4 58 – 144 80 95 96 PSB 483-7iR
1
I
o max for
V
i -80 V or reduced temperature. See:
Thermal Considerations.
2Surges up to 156 V for 2 s. See also:
Electrical Input Data:
D
V
io min
.
3Efficiency at
V
i nom and
I
o nom.
Summary
The PSB 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 e xcellent dynamic response .
Safety according to IEC/EN 60950
Modules with input voltages up to 144 V are specially de-
signed for battery driven mobile applications. The case
design allows operation at nominal load up to 71°C with-
out additional cooling.
Non standard input/output configurations or special custom adaptions are available on request.
See also:
Commercial Information: Inquiry Form for Customized Power Supply.
106
4.2"
69
2.7"
32
1.3"
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
REV. OCT 17, 2003 Page 2 of 13
Par t Number Descriptions PSB 12 3 -7 L i R P C
Positive switching regulator in case B02 ...................PSB
Nominal output voltage in volt (5A for 5.1 V)....... 5A, ... 48
Nominal output current in ampere ............................. 4, 5
Operational ambient temperature range
T
A
– 25 to 71 °C.........................................................-7
– 40 to 71 °C (option) ...........................................-9
Input filter (option)............................................................ L
Inhibit input ....................................................................... i
Control input for output voltage adjustment 1 ................. R
Potentiometer 1 (option) ...................................................P
Thyristor crowbar (option) .............................................. C
1Feature R excludes option P and vice versa.
Example: PSB 123-7LiPC = A positive switching regulator with a 12 V, 3 (4) A output, ambient temperature range of
– 25 to 71 °C, input filter, inhibit input, potentiometer and thyristor crowbar.
Control circuit
Option P
Go–
Vo+
Gi–
Vi+
Input Filter
Option L
G
R
i
G
I
o
V
o
I
i
V
iOption C
Option C
03011
Fig. 1
Block diagram
Functional Description
The switching regulators are designed using the buck con-
verter topology. See also:
Technical Information: Topolo-
gies
. 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 choke to the load
and back through the freewheeling diode. Regulation is
accomplished by varying the on/off duty ratio of the power
switch.
These regulators are ideal for a wide range of applica-
tions, 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.
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
REV. OCT 17, 2003 Page 3 of 13
Electrical Input Data
General Conditions:
T
A = 25°C, unless
T
C is specified
Table 2a: Input data
Input PSB 5A4 PSB 123 PSB 153
Characteristics Conditions min typ max min typ max min typ max Unit
V
iOperating input voltage 1
I
o = 0 –
I
o max 15 144 18 144 22 144 V DC
D
V
io min Min. diff. voltage (
V
i –
V
o)
T
C min -
T
C max 9.9 6 7
V
U VL Undervoltage lock-out 10 12 15
I
i NL No load input current
I
o = 0,
V
i min –
V
i max 40 35 35 mA
I
inr p Peak value of inrush current
V
i nom 150 150 150 A
t
inr r Rise time without option L 555µs
t
inr h Time to half-value 40 40 40
I
inr p Peak value of inrush current
V
i nom 180 180 180 A
t
inr r Rise time with option L 15 15 15 µs
t
inr h Time to half-value 100 10 0 100
u
i RFI Input RFI level, EN 55011/22
V
i nom,
I
o nom AAAdB (µV)
0.15 – 30 MHz with option L B 2 B 2 B 2
Table 2b: Input data
Input PSB 243 PSB 363 PSB 483
Characteristics Conditions min typ max min typ max min typ max Unit
V
iOperating input voltage 1
I
o = 0 –
I
o max 31 144 44 144 58 144 V DC
∆
V
io min Min. diff. voltage (
V
i –
V
o)
T
C min –
T
C max 7810
V
UVL Undervoltage lock-out 19 29 40
I
i NL No load input current
I
o = 0,
V
i min –
V
i max 35 40 45 mA
I
inr p Peak value of inrush current
V
i nom 150 150 150 A
t
inr r Rise time without option L 555µs
t
inr h Time to half-value 40 40 40
I
inr p Peak value of inrush current
V
i nom 180 180 180 A
t
inr r Rise time with option L 15 15 15 µs
t
inr h Time to half-value 100 10 0 100
u
i RFI Input RFI level, EN 55011/22
V
i nom,
I
o nom AAAdB (µV)
0.15 – 30 MHz with option L B 2 B 2 B 2
1Surges up to 156 V for 2 s (complying to LES-DB standard for
V
N = 110 V).
2With external input capacitor
C
e = 470 µF/200 V and option L.
External Input Circuitry
The sum of the lengths of the supply lines to the source or
to the nearest capacitor •100 µF (a + b) should not exceed
5 m unless option L is fitted. This option is recommended
in order to prevent power line oscillations and reduce su-
perimposed interference voltages. See also:
Technical In-
formation
:
Application Notes
.
Vi+
Gi–
Vo+
Go–
a
b
+
04016
Fig. 2
Switching regulator with long supply lines.
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
REV. OCT 17, 2003 Page 4 of 13
Electrical Output Data
General Conditions:
–
T
A = 25°C, unless
T
C is specified
– R pin not connected, with opt. P, Vo adjusted to
V
o nom at
I
o nom
Table 3a: Output data
Output PSB 5A4 PSB 123 PSB 153
Characteristics Conditions min typ max min typ max min typ max Unit
V
oOutput voltage
V
i nom,
I
o max 5.07 5.13 11.93 12.07 14.91 15.09 V
I
oOutput current 1
V
i min –
V
i max 0 5.0 0 4.0 0 4.0 A
I
oL Output current limitation
T
C min –
T
C max 5.0 6.5 4.0 5.2 4.0 5.2
response 1
u
oOutput Switching freq.
V
i nom,
I
o max 15 35 25 45 40 70 mVpp
voltage Total IEC/EN 61204 2 19 39 29 49 44 74
noise BW = 20 MHz
D
V
o U Static line regulation
V
i min –
V
i max,
I
o max 20 45 30 55 50 75 mV
D
V
o l Static load regulation
V
i nom,
I
o = 0 –
I
o max 20 35 25 40 30 65
V
o d Dynamic Voltage deviat.
V
i nom 100 100 100
t
dload Recovery time
I
o nom ↔ 1/3
I
o nom 50 60 60 µs
regulation IEC/EN 61204 2
aUo Temperature coefficient
V
i min –
V
i max ±1 ±2 ±3 mV/K
D
V
o/D
T
C (
T
C min –
T
C max)
I
o = 0 –
I
o max ±0.02 ±0.02 ±0.02 %/K
Table 3b: Output data
Output PSB 243 PSB 363 PSB 483
Characteristics Conditions min typ max min typ max min typ max Unit
V
oOutput voltage
V
i nom,
I
o max 23.86 24.14 35.78 36.22 47.71 48.29 V
I
oOutput current 1
V
i min –
V
i max 0 4.0 0 4.0 0 4.0 A
I
oL Output current limitation
T
C min –
T
C max 4.0 5.2 4.0 5.2 4.0 5.2
response 1
u
oOutput Switching freq.
V
i nom,
I
o max 45 120 70 180 90 190 mVpp
voltage Total IEC/EN 61204 2 50 125 75 185 95 195
noise BW = 20 MHz
D
V
o U Static line regulation
V
i min -
V
i max,
I
o max 70 150 100 200 150 300 mV
D
V
o l Static load regulation
V
i nom,
I
o = 0 –
I
o max 70 120 120 160 150 250
V
o d Dynamic Voltage deviat.
V
i nom 120 140 150
t
dload Recovery time
I
o nom ↔ 1/3
I
o nom 80 100 100 µs
regulation IEC/EN 61204 2
aUo Temperature coefficient
V
i min –
V
i max ±5 ±8 ±10 mV/K
D
V
o/D
T
C (
T
C min –
T
C max)
I
o = 0 –
I
o max ±0.02 ±0.02 ±0.02 %/K
1See also:
Temperature Dependent Output Current Limitation Response I
oL
and:
Thermal Considerations.
2See:
Technical Information
:
Measuring and Testing
.
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
REV. OCT 17, 2003 Page 5 of 13
Fig. 3
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-sta-
tionary air (conv ection cooling) at a temperature
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
Measuring point of case tempera-
ture 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.
With an input voltage above 80 V (up to 144 V) or an out-
put current higher than
I
o nom (up to
I
o max) the maximum
allowed temperatures are reduced according to fig.:
Out-
put current derating versus temperature.
A check of the
case temperature at worst case conditions (highest input
voltage and highest output current of the application)
against the applicable curve of the figure 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 max
T
A
,
T
C
[˚C]
0.9
1.0
V
i
> 80 V
V
i
≤80 V
V
i
≤80 V
V
i
> 80 V
05027
46 71 83
T
A min
T
C min
T
A ma
x
T
C ma
x
Fig. 4
Output current derating versus temperature
Output Protection
A voltage suppressor diode which in worst case conditions
fails into a shor t circuit, (or a thyristor crowbar, option C)
protects the output against an internally generated over-
voltage. Such an overvoltage could occur due to a failure
of either the control circuit or the switching transistor. The
output protection is not designed to withstand externally
applied overvoltages. The user should ensure that sys-
tems with Power-One power supplies, in the event of a
failure, do not result in an unsafe condition (fail-safe).
Parallel and Series Connection
Outputs of equal nominal voltages can be parallel-con-
nected. However, the use of a single unit with higher out-
put power, because of its power dissipation, is always a
better solution.
In parallel-connected operation, one or several outputs
may operate continuously at their current limit knee-point
which will cause an increase of the heat generation. Con-
sequently, the max. ambient temperature value should be
reduced by 10 K.
Outputs can be series-connected with any other module.
In series-connection the maximum output current is limited
by the lowest current limitation. Electrically separated
source voltages are needed for each module!
Temperature dependent output current limitation
response
I
o L
These switching regulators withstand a continuous input
voltage of up to 144 V DC (120 V +20%) with surges up to
156 V for 2 s. They also comply with LES-DB standard for
V
N = 110 V.
I
o max is continuously available over the entire temperature
range for an input voltage up to 80 V, or over the whole in-
put voltage range at a reduced maximum ambient tem-
perature of
T
A max = 46°C.
For operation at
T
A = 46 to 71 °C together with an input
voltage between 80 and 144 V the internal thermistor
(PTC) starts to reduce the output current limitation value
I
o
L. Under the most extreme conditions this results in a re-
duction of
I
o L by 1 A from
I
o max to
I
o nom.
The fig.:
Typical temperature dependent output current
limitation response I
o L shows the minimum
I
o L value for
continuous operation with diff erent ambient and case tem-
peratures . Operation at higher ambient temperatures
T
A is
possible, provided that the specified case temperature
T
C max is not exceeded (short term operation, heat sink,
fan, etc.).
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
REV. OCT 17, 2003 Page 6 of 13
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 max
I
o ma
x
I
o L
05026
Fig. 6
Overload, short-circuit behaviour V
o
versus I
o at
V
i - 80 V
or
I
o -
I
o nom.
I
o
V
i
[V]
I
o max
I
o nom
V
i min
80 108 144
T
A
= 46˚C,
T
C
= 83˚C
1 A
0502
8
T
A
= 60˚C,
T
C
= 90˚C
T
A
= 71˚C,
T
C
= 95˚C
Fig. 5
Typical temperature dependent output current limitation
response I
o L.
Short Circuit Behaviour
A constant current limitation circuit holds the output cur-
rent almost constant whenever an overload or a short cir-
cuit is applied to the regulator's output. It acts self-protect-
ing and recovers – in contrary to the fold back method –
automatically after removal of the overload or short circuit
condition.
Auxiliary Functions
i Inhibit for Remote On and 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 example, to control the
activation sequence of the regulators by a logic signal
(TTL, C-MOS, etc.). An output voltage overshoot will not
occur when switching on or off.
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. 9
Output response as a function of inhibit signal
Vi+
Gi– Go–
i
Vo+
I
inh
V
inh
06009
Fig. 8
Definition of I
inh
and V
inh
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
REV. OCT 17, 2003 Page 7 of 13
Table 4: 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 V DC
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 12 ms
t
f Switch-off time after inhibit command
R
L =
V
o nom /
I
o nom 24
I
i inh Input current when inhibited
V
i =
V
i nom 10 mA
R Control for Output Voltage Adjustment
Note: With open R input,
V
o ³
V
o nom. R excludes option P.
The output v oltage
V
o can either be adjusted with an e xter-
nal voltage (
V
ext) or with an external resistor (
R
1 or
R
2).
The adjustment range is 0…108% of
V
o nom. The minimum
differential voltage D
V
io min between input and output (see:
Electrical Input Data
) should be maintained. Under-volt-
age lock-out = Minimum input voltage.
Fig. 10
Voltage adjustment with V
ext
between R and G (Go–)
a)
V
o = 0 – 108%
V
o nom, using
V
ext between R and G (Go–)
V
o
V
ext
V
ext ≈ 2 .5 V • –––––
V
o ≈
V
o nom • –––––
V
o nom 2.5 V
Fig. 11
Voltage adjustment with external resistor R
1
or R
2
b)
V
o = 0 – 100%
V
o nom, using
R
1 between R and G (Go–):
R
14000 Ω •
V
o
V
o ≈
V
o nom • –––––––––––
R
1 ≈––––––––––
R
1 + 4000 Ω
V
o nom -
V
o
c)
V
o = 100 – 108%
V
o nom, using
R
2 between R and Vo+:
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
Vo+
R
+
4000 Ω
G
V
ref
V
ext
–
+
Go–
06035
Caution: To prevent damage
V
ex should not exceed
20 V, nor be negative and
R
2 should never be less than
47 kΩ.
Vo+
R–
+
G
4000 Ω
V
ref
R
1
R
2
Go–
06036
LED Output Voltage Indicator
A yellow output indicator LED shines when the output volt-
age is higher than approx. 3 V.
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
REV. OCT 17, 2003 Page 8 of 13
Electromagnetic Compatibility (EMC)
Electromagnetic Immunity
General condition: Case not earthed.
Table 5: 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 5
disturbance 60255-22-1 +i/–i, +o/–o 1000 V p1 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 3 contact discharge 6000 Vp1/50 ns 330 Ω10 positive and y e s B 4 5
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 4 i/c, +i/–i 4000 Vpbursts of 5/50 ns 50 Ω60s positive yes A 4 5
transient/burst 61000-4-4 5 kHz rep. rate 60s negative
transients with bursts per
15 ms burst coupling mode
duration and a
300 ms period
Surge IEC/EN 2 i/c 1000 Vp1.2/50 µs 12 Ω5 pos. and 5 neg. yes A 4
61000-4-5 +i/–i 500 Vp2 Ωsurges per
coupling mode
Conducted IEC/EN 3 i, o, signal wires 140 dBµV AM 80 % 150 Ω0.15 - 80 MHz yes A
disturbances 61000-4-6 (10 VAC) 1 kHz
1For related and previous standards see:
Technical Information: Safety & EMC
.2 i = input, o = output, c = case.
3A = Normal operation, no deviation from specifications, B = Normal operation, temporary deviation from specs possible.
4Option L neccessar y. 5 With option C, manual reset might be necessary.
Electromagnetic Emission
For emission levels refer to
Electrical Input Data
.
07008
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. 12
Typical disturbance voltage (quasi-peak) at the input
according to EN 55011/22 measured at V
i nom
and I
o nom
.
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
REV. OCT 17, 2003 Page 9 of 13
Immunity to Environmental Conditions
Table 6: 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 7: Temperature specifications, valid for air pressure of 800 – 1200 hPa (800 – 1200 mbar)
Temperature Standard -7 Option -9
Characteristics Conditions min max min max Unit
T
AAmbient temperature Operational 1 –25 71 –40 71 °C
T
CCase temperature –25 95 –40 95
T
SStorage temperature Non operational – 4 0 100 – 5 5 100
1See:
Thermal Considerations
Table 8: MTBF and device hours
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
624 000 207 000 h 96 000 h 46 000 h 13 000 000 h
1Statistical values, based on an average of 4300 working hours per year and in general field use
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
REV. OCT 17, 2003 Page 10 of 13
Mechanical Data
Dimensions in mm. Tolerances ±0.3 mm unless otherwise specified.
35
(4.7)
10 (13.5)
3.1
min. 6
101(for M3 mounting screws)
2.8 x 0.8
6.3 x 0.8
(32.5)
Yellow output voltage
LED indicator Potentiometer
(option P)
10
10.6 (4.7)
20
Measuring point of
case temperature
T
C
V
i
+
G
i
–
V
o
+
G
o
–
i
U
o
U
o
G
R
106 ±1
8.1 ±1
32.2 ±0.5
6.35 ±1
69 ±1
36.5 ±1
12.5 ±1
7 ±2
10 ±2
5 ±0.5
09013
Fig. 13
Case B02, weight 230 g
Aluminium,
black finish and self cooling
European
Projection
Standards and Approvals
All switching regulators are UL recognized according to UL
1950, UL 1012 and EN 60950 and UL recognized for
Canada to CAN/CSA C22.2 No. 234-M90.
The units have been evaluated for:
• Building in,
• Operational insulation from input to output and input/
output to case,
• The use in an overvoltage category II environment,
• The use in a pollution degree 2 environment.
Safety and Installation Instructions
Installation Instruction
Installation of the switching regulators must strictly follow
the national safety regulations in compliance with the en-
closure, mounting, creepage, clearance, casualty, mark-
ings and segregation requirements of the end-use applica-
tion.
Check for hazardous voltages before altering any connec-
tions. Connections can be made using fast-on or soldering
technique.
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 the module.
Ensure that a unit failure (e.g. by an internal short-circuit)
does not result in a hazardous condition. See also:
Safety
of operator accessible output circuit.
Cleaning Agents
In order to avoid possible damage, any penetration of
cleaning fluids is to be prevented, since the power sup-
plies are not hermetically sealed.
Protection Degree
The protection degree is IP 20.
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
REV. OCT 17, 2003 Page 11 of 13
Table 9: 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
v oltage of isolation, to be provided DC output status of the front end specified safety status of the the switching
by the A C-DC fr ont 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 non Ear thed SELV
considered secondary circuit 2 accessible case 5 circuit
as secon- Unearthed hazardous Input fuse 3 and unearthed, Unear thed 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 non accessible circuit
case 5
Mains Basic ≤60 V Earthed SEL V circuit 4 None
-250 V AC ELV circuit Input fuse 3 and earthed output
>60 V Hazardous voltage circuit 4
and non accessible
secondary circuit case 5
Double or reinforced ≤60 V SEL V circuit None SELV circuit
>60 V Double or reinforced insu- Input fuse 3 and unearthed Unearthed 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 conductor to the 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-ear thed 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. If option C is fitted, a suitable fuse is already built-in in the Vi+ line.
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.
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 cir-
cuit of the switching regulator to be an SELV circuit ac-
cording to IEC/EN 60950 up to a nominal output voltage of
30 V, or 48 V if option C is fitted.
Howev er, it is the sole responsibility of the installer or user
to assure the compliance with the relevant and applicable
safety regulations.
More information is given in
Technical Information: Safety
& EMC
.
The switching regulators are subject to manufacturing
surveillance in accordance with the above mentioned UL
and CSA and with ISO 9001 standards.
Isolation
Electric strength test voltage between input intercon-
nected with output and case: 1500 VDC, 1 s.
This test is performed as factory test in accordance with
IEC/EN 60950 and UL 1950 and should not be repeated in
the field. Power-One will not honour any guarantee claims
resulting from electric strength field tests.
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
REV. OCT 17, 2003 Page 12 of 13
Table 10: Crowbar trigger levels
Characteristics Conditions 5.1 V 12 V 15 V 24 V 36 V 48 V Unit
min max min max min max min max min max min max
V
o c Trigger voltage
V
i min -
V
i max 5.8 6.8 13.5 16 16.5 19 27 31 40 45.5 55 60 V
I
o = 0 -
I
o nom
t
sDelay time
T
C min -
T
C max 1.5 1.5 1.5 1.5 1.5 1.5 µs
Description of Options
-9 Extended Temperature Range
The operational ambient temperature range is extended
to
T
A = –40 to 71°C. (
T
C = –40 to 95°C,
T
S = –55 to 100°C.)
PPotentiometer
Option P excludes R-function. The output voltage
V
o can
be adjusted with a screwdriver in the range from 92 -
108%
V
o nom.
However, the minimum differential voltage D
V
i o min be-
tween input and output voltages as specified in:
Electrical
Input Data
should be maintained.
CThyristor Crowbar
This option is recommended to protect the load against
power supply malfunction, but it is not designed to sink ex-
ternal currents.
A fixed-value monitoring circuit checks the output voltage
V
o. When the trigger voltage
V
o c is reached, the thyristor
crowbar triggers and disables the output. It may be deacti-
vated by removal of the input voltage. In case of a switch-
ing transistor defect, an internal fuse prevents excessive
current.
Note: As a central overvoltage protection device, the
crowbar is usually connected to the external load via dis-
tributed inductance of the lines. For this reason, the over-
voltage at the load can temporarily exceed the trigger volt-
age
V
oc
. Depending on the application, further decentral-
ized overvoltage protection elements may have to be used
additionally. For further information see:
Technical Infor-
mation: Application Notes.
LInput Filter
Option L is recommended to reduce superimposed inter-
ference voltages and to prevent oscillations, if input lines
exceed approx. 5 m in total length. The fundamental wave
(approx. 120 kHz) of the reduced interference voltage be-
tween Vi+ and Gi– has, with an input line inductance of
5 µH, a maximum magnitude of 80 mVrms. A reduction can
be achieved by insertion of a capacitor across the input
(e.g. plastic foil between Vi+ and Gi–).
The input impedance of the switching regulator at 120
kHz is about 17Ω. The harmonics are small in comparison
with the fundamental wave. See also:
Electrical Input
Data: RFI
.
With option L, the maximum permissible additionally su-
perimposed ripple
u
i of the input voltage (rectifier mode) at
a specified input frequency
f
i has the following values:
u
i max = 10 Vpp at 100 Hz or Vpp = 1000 Hz /
f
i • 1V
Accessories
A variety of electrical and mechanical accessories are
available including:
– PCB-tags and isolation pads for easy and safe PCB-
mounting.
– Ring core chockes for ripple and interference reduction.
For more detailed information please refer to:
Accessory
Products on the Power-One homepage.
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
REV. OCT 17, 2003 Page 13 of 13
EC Declaration of Conformity
We
Power-One AG
Ackerstrasse 56 CH-8610 Uster
declare under our sole responsibility that all PSx Series switching regulators carr ying 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 characteristics
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 confor mity of the end product with the LVD. All PSx Series
Switching Regulators are components, intended exclusively for inclusion within other
equipment by an industrial assembly operation 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, 14 Oct. 2003
Power-One AG
Rolf Baldauf Johann Milavec
Director Engineering Director Projects and IP
