PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
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
32
1.3"
69
2.7"
106
4.2"
•
Continuous no-load and short-circuit proof
•
No derating
Safety according to IEC/EN 60950
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 excellent dynamic response.
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.
Model Selection and Key Data
Table 1: Type survey
Output
voltage
V
o nom
[V]
5.1
12
15
24
36
48
1
2
3
Output
Input
current
voltage range
I
o nom
[A]
I
o max
[A]
1
V
i
[V]
2
4
3
3
3
3
3
5
4
4
4
4
4
15
–
144
18
–
144
22
–
144
31
–
144
44
–
144
58
–
144
Input
voltage
V
i nom
[V]
60
60
60
60
80
80
Efficiency
h
min
[%]
76
87
89
92
94
95
3
Type
designation
PSB 5A4-7iR
PSB 123-7iR
PSB 153-7iR
PSB 243-7iR
PSB 363-7iR
PSB 483-7iR
Options
h
typ
[%]
80
89
90
94
95
96
-9, L, P, C
I
o max
for
V
i
-80 V or reduced temperature. See:
Thermal Considerations.
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
.
Non standard input/output configurations or special custom adaptions are available on request.
See also:
Commercial Information: Inquiry Form for Customized Power Supply.
Table of Contents
Page
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
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
REV. OCT 17, 2003
Page 1 of 13
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
Part 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
1
Feature 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.
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.
I
i
Option C
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.
03011
I
o
Input Filter
Option L
Vi+
Vo+
i
Control circuit
Option C
V
i
V
o
R
G
Gi–
Go–
Option P
Fig. 1
Block diagram
REV. OCT 17, 2003
Page 2 of 13
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
Electrical Input Data
General Conditions:
T
A
= 25°C, unless
T
C
is specified
Table 2a: Input data
Input
Characteristics
Conditions
min
15
PSB 5A4
typ
max
144
9.9
10
12
40
150
5
40
180
15
100
A
B
2
150
5
40
180
15
100
A
B
2
35
150
5
40
180
15
100
A
B
2
dB (µV)
A
µs
min
18
PSB 123
typ
max
144
6
15
35
mA
A
µs
min
22
PSB 153
typ
max
144
7
Unit
V DC
V
i
Operating input voltage
1
D
V
io min
Min. diff. voltage (V
i
–
V
o
)
I
o
= 0 –
I
o max
T
C min
-
T
C max
V
U VL
I
i NL
I
inr p
t
inr r
t
inr h
I
inr p
t
inr r
t
inr h
u
i RFI
Undervoltage lock-out
No load input current
I
o
= 0,
V
i min
–
V
i max
Peak value of inrush current
V
i nom
without option L
Rise time
Time to half-value
Peak value of inrush current
V
i nom
with option L
Rise time
Time to half-value
Input RFI level, EN 55011/22
V
i nom
,
I
o nom
0.15 – 30 MHz
with option L
Table 2b: Input data
Input
Characteristics
Conditions
min
31
PSB 243
typ
max
144
7
19
29
35
150
5
40
180
15
100
A
B
2
150
5
40
180
15
100
A
B
2
40
150
5
40
180
15
100
A
B
2
dB (µV)
A
µs
min
44
PSB 363
typ
max
144
8
40
45
mA
A
µs
min
58
PSB 483
typ
max
144
10
Unit
V DC
V
i
V
UVL
I
i NL
I
inr p
t
inr r
t
inr h
I
inr p
t
inr r
t
inr h
u
i RFI
1
2
Operating input voltage
1
∆
V
io min
Min. diff. voltage (V
i
–
V
o
)
Undervoltage lock-out
No load input current
I
o
= 0 –
I
o max
T
C min
–
T
C max
I
o
= 0,
V
i min
–
V
i max
Peak value of inrush current
V
i nom
without option L
Rise time
Time to half-value
Peak value of inrush current
V
i nom
with option L
Rise time
Time to half-value
Input RFI level, EN 55011/22
V
i nom
,
I
o nom
0.15 – 30 MHz
with option L
Surges up to 156 V for 2 s (complying to LES-DB standard for
V
N
= 110 V).
With external input capacitor
C
e
= 470
µF/200
V and option L.
04016
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+
a
b
Gi–
Vo+
Go–
Fig. 2
Switching regulator with long supply lines.
REV. OCT 17, 2003
Page 3 of 13
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
Electrical Output Data
General Conditions:
–
T
A
= 25°C, unless
T
C
is specified
– R pin not connected, with opt. P, V
o
adjusted to
V
o nom
at
I
o nom
Table 3a: Output data
Output
Characteristics
Conditions
min
5.07
0
5.0
15
19
20
20
100
50
±1
±0.02
PSB 5A4
typ
max
5.13
5.0
6.5
35
39
45
35
min
11.93
0
4.0
25
29
30
25
100
60
±2
±0.02
PSB 123
typ
max
12.07
4.0
5.2
45
49
55
40
min
14.91
0
4.0
40
44
50
30
100
60
±3
±0.02
µs
mV/K
%/K
PSB 153
typ
max
15.09
4.0
5.2
70
74
75
65
mV
mV
pp
Unit
V
A
V
o
I
o
I
oL
u
o
Output voltage
Output current
1
V
i nom
,
I
o max
V
i min
–
V
i max
T
C min
–
T
C max
Output current limitation
response
1
Output
voltage
noise
Switching freq.
V
i nom
,
I
o max
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 max
V
i nom
,
I
o
= 0 –
I
o max
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 max
Table 3b: Output data
Output
Characteristics
Conditions
min
23.86
0
4.0
45
50
70
70
120
80
±5
±0.02
PSB 243
typ
max
24.14
4.0
5.2
120
125
150
120
min
35.78
0
4.0
70
75
100
120
140
100
±8
±0.02
PSB 363
typ
max
36.22
4.0
5.2
180
185
200
160
min
47.71
0
4.0
90
95
150
150
150
100
±10
±0.02
µs
mV/K
%/K
PSB 483
typ
max
48.29
4.0
5.2
190
195
300
250
mV
mV
pp
Unit
V
A
V
o
I
o
I
oL
u
o
Output voltage
Output current
1
V
i nom
,
I
o max
V
i min
–
V
i max
T
C min
–
T
C max
Output current limitation
response
1
Output
voltage
noise
Switching freq.
V
i nom
,
I
o max
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 max
V
i nom
,
I
o
= 0 –
I
o max
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 max
1
2
See also:
Temperature Dependent Output Current Limitation Response I
oL
and:
Thermal Considerations.
See:
Technical Information: Measuring and Testing.
REV. OCT 17, 2003
Page 4 of 13
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
V
o
Vod
05010
Output Protection
A voltage suppressor diode which in worst case conditions
fails into a short 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.
D
V
o I
D
V
o I
t
d
I
o
/I
o nom
1
Vod
t
d
t
0
≥10
µs
≥10
µs
t
Fig. 3
Dynamic load regulation.
Thermal Considerations
When a switching regulator is located in free, quasi-sta-
tionary air (convection 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.
I
o
/I
o max
V
i
≤80
V
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
V
i
≤80
V
05027
V
i
> 80 V
V
i
> 80 V
T
A max
T
C max
50
T
A min
T
C min
46
60
70
71
80
83
90
100
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 different 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.).
T
A
,
T
C
[˚C]
Fig. 4
Output current derating versus temperature
REV. OCT 17, 2003
Page 5 of 13
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