PSC5A10-7IPD1 [BEL]
DC-DC Regulated Power Supply Module, 1 Output, Hybrid;
| 型号： | PSC5A10-7IPD1 |
| 厂家： | 
BEL FUSE INC. |
| 描述： | DC-DC Regulated Power Supply Module, 1 Output, Hybrid |
| 文件： | 总13页 (文件大小：223K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PSC Series Extended Data Sheet
Positive Switching Regulators (Industrial)
Input voltage up to 80 VDC
Single output of 5.1 - 36 VDC
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
• External output voltage adjustment and inhibit
• Two temperature ranges
32
1.3"
88
3.5"
151
5.9"
• Continuous no-load and short-circuit proof
• No derating
Safety according to IEC/EN 60950
Summary
Modules with input voltages up to 80 V are specially de-
signed for secondary switched and battery driven applica-
tions. The case design allows operation at nominal load up
to 71°C without additional cooling.
The PSC series of positive switching regulators is designed
as power supply modules for electronic systems. Their ma-
jor advantages include a high level of efficiency that re-
mains virtually constant over the entire input voltage range,
high reliability, low ripple and excellent dynamic response.
Model Selection and Key Data
Table 1: Type survey
Output
voltage
Vo nom [V]
Output
current
Io nom [A]
Input
voltage range
Vi [V] 1
Input
voltage
Vi nom [V]
Efficiency 2
Type
designation
Options
Superseded
old type
(phased-out)
h
min [%] htyp [%]
5.1
5.1
12
15
24
36
12
10
8
7 - 40
8 - 80
20
40
40
40
50
60
82
76
88
90
93
95
83
79
89
91
94
96
PSC 5A12-7iR
PSC 5A10-7iR
PSC 128-7iR
PSC 158-7iR
PSC 248-7iR
PSC 368-7iR
-9, L, P, C, D
PSR 512-7
PSR 510-7
PSR 128-7
PSR 158-7
PSR 248-7
PSR 368-7
15 - 80
19 - 80
29 - 80
42 - 80
8
8
8
1 See: Electrical Input Data: DVio min (min. differential voltage Vi – Vo).
2 Efficiency at Vi nom and Io nom
.
Non standard input/output configurations or special custom adaptions are available on request.
Table of Contents
Page
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
Electromagnetic Compatibility (EMC) .............................. 7
Immunity to Environmental Conditions ............................ 8
Mechanical Data .............................................................. 9
Safety and Installation Instructions ................................ 10
Description of Options ................................................... 11
Accessories ................................................................... 12
EC-Declaration of Conformity ........................................ 13
REV. MAY 12, 2004
Page 1 of 13
PSC Series Extended Data Sheet
Positive Switching Regulators (Industrial)
Part Number Description
PSC 12 8 -7 L i R P C D
Positive switching regulator in case C03 .................... PSC
Nominal output voltage in volt (5A for 5.1 V) ......... 5A - 36
Nominal output current in ampere ............................ 8 - 12
Operational ambient temperature range TA
–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
Input/output voltage monitor (option) ......................... D/D1
1 Feature R excludes option P and vice versa.
Example: PSC 128-7LiPC = A positive switching regulator with a 12 V, 8 A output, ambient temperature range of
–25 to 71°C, input filter, inhibit input, output adjust 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 in the form of flux. During the off period, this energy
forces the current to continue flowing through the output, to
the load and back through the freewheeling diode. Regula-
tion is accomplished by varying the on to off duty ratio of the
power switch.
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 trans-
former with rectifier). To optimise customer’s needs, addi-
tional options and accessories are available.
03018
Io
I i
Vo+
Vi+
Fuse1
D (option)
i
Control circuit
Vi
Vo
Option C
R
G
Gi–
Vt
Vo
Go–
Option D
Option P
1 Fuse fitted for option
Fig. 1
Block diagram
REV. MAY 12, 2004
Page 2 of 13
PSC Series Extended Data Sheet
Positive Switching Regulators (Industrial)
Electrical Input Data
General Conditions: TA = 25°C, unless TC is specified
Table 2a: Input data
Input
PSC 5A12
PSC 5A10
PSC 128
Characteristics
Conditions
min
typ
max
40
min
8
typ
max
min
15
typ
max
80
3
Unit
Vi
Operating input voltage
Io = 0 - Io nom
TC min - TC max
7
80
VDC
1
DVio min Min. diff. voltage Vi – Vo
1.9
2.9
Vi o
Undervoltage lock-out
No load input current
6.3
7.3
7.3
Ii 0
Io = 0, Vi min - Vi max
45
40
35
mA
A
Iinr p
tinr r
tinr h
Iinr p
tinr r
tinr h
ui RFI
Peak value of inrush current Vi nom
150
5
250
5
250
5
without option L
Rise time
µs
Time to half-value
40
40
40
Peak value of inrush current Vi nom
250
25
350
25
350
25
A
with option L
Rise time
µs
Time to half-value
125
125
125
Input RFI level,EN 55011/22 Vi nom, Io nom
B
B
B
0.15 - 30 MHz
with option L 2
Table 2b: Input data
Input
PSC 158
PSC 248
PSC 368
Characteristics
Conditions
min
19
typ
max
80
4
min
29
typ
max
80
5
min
42
typ
max
80
Unit
Vi
Operating input voltage
Io = 0 - Io nom
TC min - TC max
VDC
1
DVio min Min. diff. voltage Vi – Vo
6 1
Vi o
Undervoltage lock-out
No load input current
7.3
12
19
Ii 0
Io = 0, Vi min - Vi max
35
35
40
mA
A
Iinr p
tinr r
tinr h
Iinr p
tinr r
tinr h
ui RFI
Peak value of inrush current Vi nom
250
5
250
5
250
5
without option L
Rise time
µs
Time to half-value
40
40
40
Peak value of inrush current Vi nom
350
25
350
25
350
25
A
with option L
Rise time
µs
Time to half-value
125
125
125
Input RFI level,EN 55011/22 Vi nom, Io nom
B
B
B
0.15 - 30 MHz
with option L 2
1 The minimum differential voltage DVio min between input and output increases linearly by 0 to 1 V between TA = 46°C and 71°C
(TC = 70°C and 95°C)
2 With additional external input capacitor Ce = 120 µF/100 V (e.g. Nichicon PF series, or equivalent).
04016
External Input Circuitry
Vo+
Vi+
Gi–
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 super-
imposed interference voltages. See also: Technical Infor-
mation: Application Notes.
+
a
b
Go–
Fig. 2
Switching regulator with long supply lines.
REV. MAY 12, 2004
Page 3 of 13
PSC Series Extended Data Sheet
Positive Switching Regulators (Industrial)
Electrical Output Data
General Conditions:
– TA = 25°C, unless TC is specified
– With R or option P, output voltage Vo = Vo nom at Io nom
Table 3a: Output data
Output
PSC 5A12
PSC 5A10
PSC 128
Characteristics
Conditions
Vi nom, Io nom
min
typ
max
5.13
12.0
15.6
min
5.07
0
typ
max
min
typ
max
12.07
8.0
Unit
V
Vo
Io
Output voltage
5.07
0
5.13 11.93
Output current 1
Vi min - Vi max
TC min - TC max
10.0
13.0
0
A
IoL
Output current limitation
response
12.0
10.0
8.0
10.4
uo
Output
voltage
noise
Switching freq. Vi nom, Io nom
IEC/EN 61204 2
25
29
30
34
25
29
30
34
50
54
90
94
mVpp
mV
Total
BW = 20 MHz
DVo U Static line regulation
Vi min - Vi max, Io nom
Vi nom, Io = 0 - Io nom
30
20
45
25
30
20
45
25
50
30
75
35
DVo l
uo d
td
Static load regulation
Dynamic
load
regulation
Voltage deviat. Vi nom
130
40
130
50
130
60
1
Io nom ↔ /
3
Io nom
Recovery time
µs
IEC/EN 61204 2
aUo
Temperature coefficient
DVo/DTC (TC min - TC max
Vi min - Vi max
Io = 0 - Io nom
±1
±1
±2
mV/K
)
±0.02
±0.02
±0.02 %/K
Table 3b: Output data
Output
PSC 158
PSC 248
PSC 368
Characteristics
Conditions
Vi nom, Io nom
min
typ
max
min
typ
max
min
typ
max
36.22
8.0
Unit
V
Vo
Io
Output voltage
Output current 1
14.91
0
15.09 23.86
24.14 35.78
Vi min - Vi max
TC min - TC max
8.0
0
8.0
0
A
IoL
Output current limitation
response
8.0
10.4
8.0
10.4
8.0
10.4
uo
Output
voltage
noise
Switching freq. Vi nom, Io nom
50
54
90
94
55
60
150
155
80
85
190
195
mVpp
mV
IEC/EN 61204 2
BW = 20 MHz
Total
DVo U Static line regulation
Vi min - Vi max, Io nom
Vi nom, Io = 0 - Io nom
70
30
100
45
150
120
150
80
220
160
200
125
220
100
270
160
DVo l
uo d
td
Static load regulation
Dynamic
load
regulation
Voltage deviat. Vi nom
130
60
1
Io nom ↔ /
3
Io nom
Recovery time
µs
IEC/EN 61204 2
aUo
Temperature coefficient
DVo/DTC (TC min - TC max
Vi min - Vi max
Io
Io = 0 -
nom
±3
±5
±8
mV/K
)
±0.02
±0.02
±0.02 %/K
1 See also: Thermal Considerations.
2 See: Technical Information: Measuring and Testing.
REV. MAY 12, 2004
Page 4 of 13
PSC Series Extended Data Sheet
Positive Switching Regulators (Industrial)
05010
Vo
Parallel and Series Connection
Vod
DVo I
DVo I
Outputs of equal nominal voltages can be parallel-con-
nected. However, the use of a single unit with higher output
power, because of its power dissipation, is always a better
solution.
Vod
td
td
t
t
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. Conse-
quently, the max. ambient temperature value should be re-
duced by 10 K.
I /I
o
o nom
1
0
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!
≥10 µs
≥10 µs
Fig. 3
Dynamic load regulation.
Short Circuit Behaviour
Thermal Considerations
A constant current limitation circuit holds the output current
almost constant whenever an overload or a short circuit is
applied to the regulator's output. It acts self-protecting and
recovers – in contrary to the fold back method – automati-
cally after removal of the overload or short circuit condition.
When a switching regulator is located in free, quasi-station-
ary air (convection cooling) at a temperature TA = 71°C and
is operated at its nominal output current Io nom, the case
temperature TC will be about 95°C after the warm-up
phase, measured at the Measuring point of case tempera-
ture TC (see: Mechanical Data).
Vo/Vo nom
I
Under practical operating conditions, the ambient tempera-
ture TA may exceed 71°C, provided additional measures
(heat sink, fan, etc.) are taken to ensure that the case tem-
perature TC does not exceed its maximum value of 95°C.
05033
1.2
1.0
0.8
Io L
Example: Sufficient forced cooling allows TA max = 85°C. A
simple check of the case temperature TC (TC ≤ 95°C) at full
load ensures correct operation of the system.
Io/Io nom
0.6
0.4
0.2
Io/Io nom
0
Fig. 5
Overload, short-circuit behaviour Vo versus Io.
0.2
0.4
0.6
0.8
1.0
1.2
1.4
Forced cooling
1.0
0.9
0.8
Convection cooling
0.7
0.6
TC max
0.5
0.4
0.3
0.2
0.1
0
T [˚C]
A
T
50
60
70
80
90
100
A min
Fig. 4
Output current derating versus temperature
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 out-
put protection is not designed to withstand externally ap-
plied overvoltages. The user should ensure that systems
with Power-One power supplies, in the event of a failure, do
not result in an unsafe condition (fail-safe).
REV. MAY 12, 2004
Page 5 of 13
PSC Series Extended Data Sheet
Positive Switching Regulators (Industrial)
Auxiliary Functions
06009
Vo+
i
Vi+
Iinh
i Inhibit for Remote On and Off
Note: With open i-input, output is enabled (Vo = on)
Vinh
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 activa-
tion sequence of the regulators by a logic signal (TTL, C-
MOS, etc.). An output voltage overshoot will not occur when
switching on or off.
Go–
Gi–
Fig. 7
Definition of Iinh and Vinh
06001
Iinh [mA]
Vo/Vo nom
1
06034
5
4
3
0.1
0
t
tf
tr
V
V
Inhibit
1
2
1
Vo on
Vo off
t
0
0
–50
Fig. 8
Vinh [V]
–20
–30
–10
0
–40
10 20 30 40 50
Output response as a function of inhibit signal
Fig. 6
Typical inhibit current Iinh versus inhibit voltage Vinh
Table 4: Inhibit characteristics
Characteristics
Conditions
min
–50
+2.4
typ
max
+0.8
+50
Unit
Vinh
Inhibit input voltage to keep Vo = on
Vi min - Vi max
TC min - TC max
VDC
regulator output voltage -
Vo = off
t r
Switch-on time after inhibit command
Switch-off time after inhibit command
Input current when inhibited
Vi = Vi nom
RL = Vo nom /Io nom
5
ms
t f
10
10
Ii inh
Vi = Vi nom
mA
R Control for Output Voltage Adjustment
Note: With open R input, Vo ≈ Vo nom.R excludes option P.
(For superseded PSR types Vo ≈ 1.08 • Vo nom
a) Vo = 0 - 108% Vo nom, using Vext between R and G (Go–)
Vo
Vext
Vext ≈ 2.5 V • –––––
Vo ≈ Vo nom • –––––
)
Vo nom
2.5 V
The output voltage Vo can either be adjusted with an exter-
nal voltage (Vext) or with an external resistor (R1 or R2).The
adjustment range is 0 - 108% of Vo nom.The minimum differ-
ential voltage DVio min between input and output (see: Elec-
trical Input Data) should be maintained. Undervoltage lock-
out = Minimum input voltage.
Caution: To prevent damage Vext should not exceed
20 V, nor be negative and R2 should never be less than
47 kΩ.
Vo+
06036
Vo+
Vref
06035
R2
Vref
4000 Ω
+
–
4000 Ω
R
R
+
–
+
R1
Vext
G
G
Fig. 9
Fig. 10
Voltage adjustment with Vext between R and G (Go-)
Voltage adjustment with external resistor R1 or R2
REV. MAY 12, 2004
Page 6 of 13
PSC Series Extended Data Sheet
Positive Switching Regulators (Industrial)
b) Vo = 0 - 100% Vo nom, using R1 between R and G (Go-):
4000 Ω • Vo
Vo nom • R1
R1 ≈ –––––––––––
Vo ≈ –––––––––––
Vo nom – Vo
R1 + 4000 Ω
c) Vo = Vo nom - Vo max, using R2 between R and Vo+:
Vo max = Vo nom + 8%
4000 Ω • Vo • (Vo nom – 2.5 V)
R2 ≈ ––––––––––––––––––––––––
2.5 V • (Vo – Vo nom
)
Vo nom • 2.5 V • R2
Vo ≈ ––––––––––––––––––––––––––––––––
2.5 V • (R2 + 4000 Ω) – Vo nom • 4000 Ω
LED Output Voltage Indicator
A yellow output indicator LED shines when the output volt-
age is higher than approx. 3 V.
Electromagnetic Compatibility (EMC)
Electromagnetic Immunity
General condition: Case not earthed.
Table 5: Immunity type tests
Phenomenon
Standard 1
Class
Level
Coupling
mode 2
Value
applied
Waveform
Source
Imped.
Test
procedure
In
Per-
oper. form. 3
1 MHz burst
disturbance
IEC
60255-22-1
III
i/o, i/c, o/c
+i/–i, +o/–o
i/c, +i/–i
2500 Vp
1000 Vp
800 Vp
400 damped
1 MHz waves/s
200 Ω
2 s per
coupling mode
yes
yes
A 5
B
Voltage surge
IEC 60571-1
100 µs
50 µs
100 Ω
1500 Vp
1 pos. and 1 neg.
voltage surge per
coupling mode
3000 Vp
4000 Vp
7000 Vp
5 µs
1 µs
100 ns
1/50 ns
Electrostatic
discharge
IEC/EN
61000-4-2
3
2
contact discharge 6000 Vp
to case
330 Ω
10 positive and
10 negative
discharges
yes
A 4
A
Electromagnetic IEC/EN
field
antenna
i/c, +i/–i
3 V/m
AM 80%
1 kHz
80 - 1000 MHz
yes
yes
61000-4-3
Electrical fast
transients/burst 61000-4-4
IEC/EN
3
4
2000 Vp bursts of 5/50 ns 50 Ω
60 s positive
60 s negative
bursts per
A 4 5
B 4 5
5 kHz rep. rate
transients with
15 ms burst
4000 Vp
coupling mode
duration and a
300 ms period
Surge
IEC/EN
61000-4-5
3
3
i/c
2000 Vp
1000 Vp
1.2/50 µs
12 Ω
2 Ω
5 pos. and 5 neg.
surges per
coupling mode
yes
yes
B 4 5
+i/–i
Conducted
disturbances
IEC/EN
61000-4-6
i, o, signal wires 140 dBµV
AM 80%
1 kHz
150 Ω
0.15 - 80 MHz
A
(10 VAC)
1 For related and previous standards see: Technical Information: Safety & EMC. 2 i = input, o = output, c = case.
3 A = Normal operation, no deviation from specifications, B = Normal operation, temporary deviation from specs possible.
4 Option L neccessary. 5 With option C, manual reset might be necessary.
REV. MAY 12, 2004
Page 7 of 13
PSC Series Extended Data Sheet
Positive Switching Regulators (Industrial)
[dBµV]
90
Electromagnetic Emission
07018
For emission levels refer to: Electrical Input Data.
80
EN 55022 A
EN 55022 B
70
60
50
40
30
20
10
Fig. 11
0
MHz
Typical disturbance voltage (quasi-peak) at the input ac-
cording to EN 55011/22 measured at Vi nom and Io nom
.
Immunity to Environmental Conditions
Table 6: Mechanical stress
Test Method
Standard
Test Conditions
Status
Ca
Ea
Eb
Fc
Damp heat
steady state
IEC/DIN 60068-2-3
MIL-STD-810D section 507.2 Relative humidity:
Duration:
Temperature:
40 ±2 °C
%
56 days
Unit not
operating
93 +2/-3
Shock
(half-sinusoidal)
IEC/EN/DIN 60068-2-27
MIL-STD-810D section 516.3 Bump duration:
Number of bumps:
Acceleration amplitude:
100 gn = 981 m/s2
6 ms
18 (3 each direction)
Unit
operating
Bump
(half-sinusoidal)
IEC/EN/DIN 60068-2-29
MIL-STD-810D section 516.3 Bump duration:
Number of bumps:
Acceleration amplitude:
40 gn = 392 m/s2
6 ms
6000 (1000 each direction)
Unit
operating
Vibration
(sinusoidal)
IEC/EN/DIN 60068-2-6
MIL-STD-810D section 514.3
Acceleration amplitude:
0.35 mm (10 - 60 Hz)
5 gn = 49 m/s2 (60 - 2000 Hz) operating
10 - 2000 Hz
Unit
Frequency (1 Oct/min):
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
Reproducibility
high
DIN 40046 part 23
Frequency band:
Acceleration magnitude:
Test duration:
20 - 500 Hz
4.9 grms
3 h (1 h each axis)
operating
Kb
Salt mist, cyclic
(sodium chloride
NaCl solution)
IEC/EN/DIN 60068-2-52
Concentration:
Duration:
Storage:
Storage duration:
Number of cycles:
5% (30°C)
Unit not
operating
2 h per cycle
40°C, 93% rel. humidity
22 h per cycle
3
Table 7: Temperature specifications, valid for air pressure of 800 - 1200 hPa (800 - 1200 mbar)
Temperature
Standard -7
Option -9
Characteristics
Conditions
Operational 1
min
max
71
min
–40
–40
–55
max
71
Unit
°C
TA
TC
TS
Ambient temperature
–25
–25
–40
Case temperature
95
95
Storage temperature
Non operational
100
100
1 See: Thermal Considerations
Table 8: MTBF and device hours
MTBF
Ground Benign
TC = 40°C
Ground Fixed
Ground Mobile
TC = 50°C
Device Hours 1
MTBF acc. to MIL-HDBK-217F
TC = 40°C
143 000 h
TC = 70°C
81 000 h
660 000
68 000 h
2 800 000 h
1 Statistical values, based on an average of 4300 working hours per year and in general field use
REV. MAY 12, 2004
Page 8 of 13
PSC Series Extended Data Sheet
Positive Switching Regulators (Industrial)
Mechanical Data
Dimensions in mm. Tolerances ±0.3 mm unless otherwise specified.
European
Projection
09023
Yellow LED output
voltage indicator
Potentiometer
(option D)
Potentiometer
(option P)
Ut
Uo
Gi–
D
G
Go– Vo+
Vi+
Uo
R
i
151 ±1
Distance between M4 mounting screws
144
5 ±0.5
Measuring point
of case temperature TC
Fig. 12
Case C03, weight 440 g
Aluminium, black finish and
self cooling
11.3
18.5
12.5 ±1
40
7.5
(14)
10 7.5 10
7.5
27.5 7.5
Safety and Installation Instructions
Installation Instruction
Standards and Approvals
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.
All switching regulators are UL recognized according to UL
1950, UL 1012 and EN 60950, 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/out-
put to case,
Check for hazardous voltages before altering any connec-
tions. Connections can be made using fast-on or soldering
technique.
• The use in an overvoltage category II environment,
• The use in a pollution degree 2 environment.
The input and the output circuit are not separated, i.e. the
negative path is internally interconnected!
The switching regulators are subject to manufacturing sur-
veillance in accordance with the above mentioned UL and
CSA and with ISO 9001 standards.
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.
Isolation
Electric strength test voltage between input interconnected
with output against case: 750 VDC, 1 s.
Cleaning Agents
This test is performed in the factory as routine test in
accordance with EN50116, 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.
In order to avoid possible damage, any penetration of
cleaning fluids is to be prevented, since the power supplies
are not hermetically sealed.
Protection Degree
The protection degree is IP 20.
REV. MAY 12, 2004
Page 9 of 13
PSC Series Extended Data Sheet
Positive Switching Regulators (Industrial)
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
However, it is the sole responsibility of the installer or user
to assure the compliance with the relevant and applicable
safety regulations.
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 nominal output voltage of 30 V, or
48 V if option C is fitted.
More information is given in: Technical Information: Safety
& EMC.
Table 9: Insulation concept leading to an SELV output circuit
ConditionsFront end
Switching regulator
Result
Supply
voltage
Minimum required grade Maximum Minimum required safety
of isolation, to be provided DC output status of the front end
Measures to achieve the
specified safety status of the
output circuit
Safety status of
the switching
regulator output
circuit
by the AC-DC front end,
voltage
output circuit
including mains supplied from the
battery charger
front end 1
≤60 V
Battery
Double or Reinforced
SELV circuit
None
SELV circuit
supply,
>60 V
Earthed hazardous voltage Input fuse 3 non accessible
secondary circuit
Earthed SELV
circuit
considered
as secon-
dary circuit
2
case 5
Unearthed hazardous
Input fuse 3 and unearthed,
Unearthed SELV
circuit
voltage secondary circuit 5 non accessible case 5
Hazardous voltage
secondary circuit
Input fuse 3 and earthed output Earthed SELV
circuit 4 and non accessible
case 5
circuit
Mains
≤250 V AC
Basic
≤60 V
Earthed SELV circuit 4
ELV circuit
None
Input fuse 3 and earthed output
circuit 4 and non accessible
case 5
>60 V
Hazardous voltage
secondary circuit
Double or reinforced
≤60 V
SELV circuit
None
SELV circuit
>60 V
Double or reinforced insu- Input fuse 3 and unearthed
lated unearthed hazardous and non accessible case 5
voltage secondary circuit 5
Unearthed SELV
circuit
1 The front end output voltage should match the specified input voltage range of the switching regulator.
2 The 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.
3 The 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. If option C is fitted, a suitable fuse is already built-in in the Vi+ line.
4 The earth connection has to be provided by the installer according to the relevant safety standard, e.g. IEC/EN 60950.
5 Has 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.
REV. MAY 12, 2004
Page 10 of 13
PSC Series Extended Data Sheet
Positive Switching Regulators (Industrial)
With option L, the maximum permissible additionally su-
perimposed ripple ui of the input voltage (rectifier mode) at
a specified input frequency f i has the following values:
Description of Options
-9 Extended Temperature Range
Units with max input voltage 40 V:
The operational ambient temperature range is extended to
TA = –40 to 71°C. (TC = –40 to 95°C, TS = –55 to 100°C.)
ui max = 12 Vpp at 100 Hz or Vpp = 1200 Hz/f i • 1V
Units with max input voltage 80 V:
P
Potentiometer
ui max = 22 Vpp at 100 Hz or Vpp = 2200 Hz/f i • 1V
Option P excludes R function.The output voltage Vo can be
adjusted with a screwdriver in the range from 0.92 - 1.08 of
C
Crowbar
the nominal output voltage Vo nom
.
This option is recommended to protect the load against
power supply malfunction, but it is not designed to sink ex-
ternal currents.
However, the minimum differential voltage DVi o min between
input and output voltages as specified in: Electrical Input
Data should be maintained.
A fixed-value monitoring circuit checks the output voltage
Vo. When the trigger voltage Vo 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 switching
transistor defect, an internal fuse prevents excessive cur-
rent.
L
Input 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 4 mVAC. A reduction can
be achieved by insertion of a capacitor across the input
(e.g. plastic foil between Vi+ and Gi–).
Note: As a central overvoltage protection device, the crow-
bar is usually connected to the external load via distributed
inductance of the lines. For this reason, the overvoltage at
the load can temporarily exceed the trigger voltage Vo c. De-
pending on the application, further decentralized over-
voltage protection elements may have to be used addition-
ally.
The input impedance of the switching regulator at 120 kHz
is about 3.5 Ω.The harmonics are small in comparison with
the fundamental wave. See also: Electrical Input Data: RFI.
Table 10: Crowbar trigger levels
Characteristics
Conditions
5.1 V
12 V
15 V
24 V
36 V
Unit
min max
min max
min max
min max
min max
Vi min - Vi max
Io = 0 - Io nom
TC min - TC max
Vo c Trigger voltage
5.8
6.8
1.5
13.5
16
16.5 19
1.5
27
31
40 45.5
1.5
V
ts
Delay time
1.5
1.5
µs
D
Save Data Input Undervoltage Monitor
11025
Note: Output instead of input undervoltage monitor is
10 kΩ
available on request (Option D1).
ID
D
Vi +
Terminal D and Go– are connected to a normally conduct-
ing field effect transistor (JFET). The switching characteris-
tics of the option D output are shown in fig. Definition of Vt
and VH. A 0.5 W Zener diode provides protection against
overvoltages.
+5 V
JFET
8.2 V
Go –
Vt
VD
100 pF
Gi –
The voltage Vt can be externally adjusted with a trim poten-
tiometer by means of a screwdriver.The hysteresis VH of Vt
is <2%. Terminal D stays low for a minimum time tlow min, in
order to prevent any oscillation. Vt can be set to a value
between Vi min and Vi max. Please note that the JFET be-
comes conductive when VD increases above 7 V approx.
Fig. 13
Test circuit with definition of voltage VD and current ID
REV. MAY 12, 2004
Page 11 of 13
PSC Series Extended Data Sheet
Positive Switching Regulators (Industrial)
11026
VH
VD
VD high
VD low
Vi
Vt
Fig. 14
Definition of Vt and VH
Data
Table 11: Option D data
Characteristics
Conditions
PSC
Unit
min
typ
max
0.8
VD low
VD high
tlow min
tD f
Voltage - Terminal D at low impedance
Voltage - Terminal D at high impedance
Minimum duration VD low
Vi < Vt, ID - 2.5 mA
V
Vi > Vt + VH, ID > 25 µA
4.75
30
1
ms
µs
Response time to VD low
ID max
Maximum current - Terminal D
20
mA
Application examples:
a) The signal VD can be utilized in battery powered systems to provide a warning in case of low batteries.
b) In case of power failure, the signal can serve to initiate data save routines.
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: Accessories
on the Power-One homepage.
NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not authorized for use as critical 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 certifications pictured on labels, may change
depending on the date manufactured. Specifications are subject to change without notice.
REV. MAY 12, 2004
Page 12 of 13
PSC Series Extended Data Sheet
Positive Switching Regulators (Industrial)
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 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 conformity 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. They 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
REV. MAY 12, 2004
Page 13 of 13
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