PSR152.5-7-9R [BEL]
1-OUTPUT DC-DC REG PWR SUPPLY MODULE;
| 型号： | PSR152.5-7-9R |
| 厂家： | 
BEL FUSE INC. |
| 描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE 输出元件 |
| 文件： | 总11页 (文件大小：652K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Industrial Environment
Switching Regulators, PCB & Chassis
PSR Series
PSR: Positive Switching Regulators
PSR-Series
No input to output isolation
Single output of 5, 12, 15, 24 or 36 V DC/15...72 W
Input voltage up to 80 V DC
• High efficiency up to 94%
• Wide input voltage range
• Low input to output differential voltage
• Very good dynamic properties
• Input undervoltage lock-out
• Parallel configurations possible
• Continuous no-load and short-circuit proof
• No derating
25
1.0"
50
2.0"
70
2.8"
Safety according to IEC/EN 60950
C
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 PSR 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.
Type Survey and Key Data
Table 1: Type survey
Output
voltage
Uo nom [V]
Output
current
Io nom [A]
Input
voltage range
Ui [V] 1
Input
voltage
Ui nom [V]
Efficiency 2
Type
designation
Options
ηmin [%]
ηtyp [%]
83
5
5
5
4
7...35
7...40
20
20
40
40
40
40
50
60
81
82
77
72
86
88
91
92
PSA 55-7
PSR 54-7
PSR 53-7
PSR 52-7
PSR 122.5-7
PSR 152.5-7
PSR 242-7
PSR 362-7
.
-9, i, P, R, Y
-9, i, P, R, Y
-9, i, P, R, Y
Y
83
5
3
8...80
79
5
2
8...80
74
12
15
24
36
2.5
2.5
2
15...80
19...80
29...80
42...80
87
-9, i, P, R, Y
-9, i, P, R, Y
-9, i, P, R, Y
-9, i, P, R, Y
89
92
2
94
1 See also: Electrical Input Data: DUio min
.
2 Efficiency at Ui nom and Io 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
Summary.......................................................................... 1
Type Survey and Key Data.............................................. 1
Type Key .......................................................................... 2
Functional Description ..................................................... 2
Electrical Input Data ........................................................ 3
Electrical Output Data...................................................... 4
Auxiliary Functions .......................................................... 5
Electromagnetic Compatibility (EMC) ............................. 6
Immunity to Environmental Conditions ........................... 7
Mechanical Data .............................................................. 8
Safety and Installation Instructions ................................. 8
Description of Options ................................................... 10
Accessories ................................................................... 11
Edition 4/4.99
1/11
MELCHER
The Power Partners.
PSR Series
Switching Regulators, PCB & Chassis
Industrial Environment
Type Key
PSR 12 2.5 -7 i R P Y
Positive switching regulator in case A01.....................PSR
Nominal output voltage in volt ................................... 5...36
Nominal output current in ampere............................... 2...5
Operational ambient temperature range TA
–25...71°C ........................................................... -7
–40...71°C (option) .............................................. -9
Options:
Inhibit input ............................................................ i
Control input for output voltage adjustment 1 ....... R
Potentiometer 1 .....................................................P
PCB soldering pins 0.5 × 1.0 mm .........................Y
1 Option R excludes option P and vice versa.
Example: PSR 122.5-7iPY = A positive switching regulator with a 12 V, 2.5 A output, ambient temperature range of
–25…71°C, inhibit input, potentiometer and PCB soldering pins.
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.
Regulation is accomplished by varying the on to 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.
03015
Io
Ii
Vo+
Vi+
i (option)
Control circuit
Ui
Uo
Ce
R (option)
Go–
Gi–
Option P
Fig. 1
Block diagram
Edition 4/4.99
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MELCHER
The Power Partners.
Industrial Environment
Switching Regulators, PCB & Chassis
PSR Series
Electrical Input Data
General Conditions: TA = 25°C, unless TC is specified
Table 2a: Input data
Input
PSA 55
PSR 54
PSR 53
PSR 52
Characteristics
Ui Operating input voltage
DUio min Min. diff. voltage Ui – Uo
Conditions
min typ max min typ max min typ max min typ max Unit
Io = 0...Io nom
TC min...TC max
7
35
2
7
40
2
8
80
3
8
80 V DC
3
1
Ui o
Ii 0
Undervoltage lock-out
No load input current
6.3
6.3
7.3
7.3
Io = 0, Ui min...Ui max
45
45
40
40
mA
A
Iinr p
tinr r
tinr h
ui RFI
Peak value of inrush current Ui nom
Rise time
75
2.5
15
75
2.5
15
150
2.5
15
150
2.5
15
µs
Time to half-value
Input RFI level,EN 55011/22 Ui nom, Io nom
0.01...30 MHz
B 2
B 2
B 3
B 3
Table 2b: Input data
Input
PSR 122.5
PSR 152.5
PSR 242
PSR 362
Characteristics
Conditions
min typ max min typ max min typ max min typ max Unit
Ui
Operating input voltage
Io = 0...Io nom
TC min...TC max
15
80
3
19
80
4
29
80
5
42
80 V DC
6
1
DUio min Min. diff. voltage Ui – Uo
Ui o
Ii 0
Undervoltage lock-out
No load input current
7.3
7.3
12
19
Io = 0, Ui min...Ui max
35
35
35
40
mA
A
Iinr p
tinr r
tinr h
ui RFI
Peak value of inrush current Ui nom
Rise time
150
2.5
15
150
2.5
15
150
2.5
15
150
2.5
15
µs
Time to half-value
Input RFI level,EN 55011/22 Ui nom, Io nom
0.01...30 MHz
B 3
B 3
B 3
B 3
1 The minimum differential voltage DUio 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 input filter FP 38 (connected between Uii and Gi, see: Accessory Products) and Ce = 470 µF/40 V
3 With input filter FP 80 (connected between Uii and Gi, see: Accessory Products) and Ce = 470 µF/100 V
External Input Circuitry
04016
The sum of the lengths of the supply lines to the source or
Vo+
Vi+
to the nearest capacitor ≥100 µF or to the nearest external
input filter which includes such a capacitor (a + b) should
not exceed 0.3 m (0.5 m twisted). An external input filter
(FP 38 or FP 80, see: Accessory Products) is recom-
mended in order to prevent power line oscillations and re-
duce superimposed interference voltages. See also: Tech-
nical Information: Application Notes.
+
a
b
Gi–
Go–
Fig. 2
Switching regulator with long supply lines.
Edition 4/4.99
3/11
MELCHER
The Power Partners.
PSR Series
Switching Regulators, PCB & Chassis
Industrial Environment
Electrical Output Data
General Conditions:
– TA = 25°C, unless TC is specified
– With R or option P, output voltage Uo = Uo nom at Io nom
Table 3a: Output data
Output
PSA 55
PSR 54
PSR 53
PSR 52
Characteristics
Conditions
min typ max min typ max min typ max min typ max Unit
Uo
Io
Output voltage
Ui nom, Io nom
4.97
0
5.03 4.97
5.03 4.97
5.03 4.97
5.03
2.0
V
A
Output current 1
Ui min...Ui max
TC min...TC max
5.0 3
6.5
0
4.0
5.2
0
3.0
3.9
0
IoL
Output current limitation
response 1
5.0
4.0
3.0
2.0
2.6
uo
Output
voltage
noise
Switching freq. Ui nom, Io nom
IEC/EN 61204 2
20 35
24 39
15 25
19 29
20 35
24 39
20 35 mVpp
24 39
Total
BW = 20 MHz
DUo U Static line regulation
Ui min...Ui max, Io nom
Ui nom, Io = 0...Io nom
30 45
20 25
250
30 45
20 25
200
30 45
20 25
100
30 45
20 25
100
mV
DUo l
uo d
td
Static load regulation
Dynamic
load
Voltage deviat. Ui nom
I
o nom ↔ 1/
Io nom
3
Recovery time
40
40
50
50
µs
regulation
IEC/EN 61204 2
aUo
Temperature coefficient
DUo/DTC (TC min...TC max
Ui min...Ui max
Io = 0...Io nom
±1
±1
±1
±1 mV/K
±0.02 %/K
)
±0.02
±0.02
±0.02
Table 3b: Output data
Output
PSR 122.5
PSR 152.5
PSR 242
PSR 362
Characteristics
Conditions
min typ max min typ max min typ max min typ max Unit
Uo
Io
Output voltage
Output current 1
Ui nom, Io nom
11.93
0
12.07 14.91
2.5
3.25 2.5
15.09 23.86
24.14 35.78
36.22
2.0
V
A
Ui min...Ui max
TC min...TC max
0
2.5
0
2.0
2.6
0
IoL
Output current limitation
response 1
2.5
3.25
2.0
2.0
2.6
uo
Output
voltage
noise
Switching freq. Ui nom, Io nom
30 45
40 75
44 80
45 95
50 100
80 160 mVpp
85 165
IEC/EN 61204 2
BW = 20 MHz
Total
35 50
DUo U Static line regulation
Ui min...Ui max, Io nom
Ui nom, Io = 0...Io nom
50 75
35 45
180
70 100
40 55
180
150 220
120 160
210
200 270
125 160
250
mV
DUo l
uo d
td
Static load regulation
Dynamic
load
Voltage deviat. Ui nom
I
o nom ↔ 1/
Io nom
3
Recovery time
60
60
80
100
µs
regulation
IEC/EN 61204 2
aUo
Temperature coefficient
DUo/DTC (TC min...TC max
Ui min...Ui max
Io = 0...Io nom
±2
±3
±5
±8 mV/K
±0.02 %/K
)
±0.02
±0.02
±0.02
1 See also: Thermal Considerations.
2 See: Technical Information: Measuring and Testing.
3 Linear derating from 5 to 4 A between TA = 61°C and 71°C (TC = 85°C and 95°C).
05010
Uo
uod
DUo I
DUo I
uod
td
td
t
I /I
o
o nom
1
t
0
≥10 s
≥10 s
Fig. 3
Dynamic load regulation.
Edition 4/4.99
4/11
MELCHER
The Power Partners.
Industrial Environment
Switching Regulators, PCB & Chassis
PSR Series
Thermal Considerations
Parallel and Series Connection
When a switching regulator is located in free, quasi-sta-
tionary 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).
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.
Under practical operating conditions, the ambient tem-
perature TA may exceed 71°C, provided additional meas-
ures (heat sink, fan, etc.) are taken to ensure that the case
temperature TC does not exceed its maximum value of
95°C.
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!
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.
Short Circuit Behaviour
Io/Io nom
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
Forced cooling
1.0
0.9
0.8
Convection cooling
0.7
condition.
Uo/Uo nom
0.6
TC max
05033
0.5
1.2
0.4
0.3
0.2
0.1
1.0
0.8
Io L
0.6
0
T [°C]
A
0.4
0.2
T
50
60
70
80
90
100
A min
Fig. 4
Io/Io nom
0
Output current derating versus temperature
0.2
0.4
0.6
0.8
1.0
1.2
1.4
Fig. 5
Overload, short-circuit behaviour Uo versus Io.
Output Protection
A voltage suppressor diode which in worst case conditions
fails into a short circuit, protects the output against an in-
ternally generated overvoltage. 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 systems with Melcher power supplies,
in the event of a failure, do not result in an unsafe condi-
tion (fail-safe).
Auxiliary Functions
LED Output Voltage Indicator
A yellow output indicator LED shines when the output volt-
age is higher than approx. 3 V.
The LED output voltage indicator is not available for
PSR 52.
Edition 4/4.99
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MELCHER
The Power Partners.
PSR Series
Switching Regulators, PCB & Chassis
Industrial Environment
Electromagnetic Compatibility (EMC)
Electromagnetic Immunity
General condition: Case not earthed.
Table 4: 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
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
B 4
A
Electromagnetic IEC/EN
field
antenna
3 V/m
AM 80%
1 kHz
26…1000 MHz
yes
yes
61000-4-3
Electrical fast
transient/burst
IEC/EN
61000-4-4
3
4
i/c, +i/–i
2000 Vp bursts of 5/50 ns 50 Ω
1 min positive
1 min negative
bursts per
A 4
B 4
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
2
3
i/c
1000 Vp
500 Vp
1.2/50 µs
12 Ω
2 Ω
5 pos. and 5 neg.
surges per
coupling mode
yes
yes
B 4
A
+i/–i
Conducted
disturbances
IEC/EN
61000-4-6
i, o, signal wires 140 dBµV
(10 Vrms
AM 80%
1 kHz
150 Ω
0.15...80 MHz
)
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 External input filter FP 38 or FP 80 necessary.
Electromagnetic Emission
For emission levels refer to: Electrical Input Data.
[dBµV]
07011
90
80
EN 55022 A
EN 55022 B
70
60
50
40
30
20
10
0
MHz
Fig. 6
Typical disturbance voltage (quasi-peak) at the input ac-
cording to EN 55011/22 measured at Ui nom and Io nom
.
Edition 4/4.99
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MELCHER
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Switching Regulators, PCB & Chassis
PSR Series
Immunity to Environmental Conditions
Table 5: Mechanical stress
Test Method
Standard
Test Conditions
Status
Ca
Ea
Eb
Fc
Damp heat
steady state
IEC/DIN IEC 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 EN 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 EN 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 EN 60068-2-6
MIL-STD-810D section 514.3
Acceleration amplitude:
0.7 mm (10...60 Hz)
10 gn = 98 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: 0.2 g2/Hz
Unit
wide band
Reproducibility
high
DIN 40046 part 23
Frequency band:
Acceleration magnitude:
Test duration:
20...500 Hz
9.8 grms
3 h (1 h each axis)
operating
Kb
Salt mist, cyclic
(sodium chloride
NaCl solution)
IEC/EN/DIN IEC 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 6: Temperature specifications, valid for air pressure of 800...1200 hPa (800...1200 mbar)
Temperature
Standard -7
Option -9
Characteristics
Conditions
Operational 2
min
max
71
min
–40
–40
–55
max
71
Unit
TA
TC
TS
Ambient temperature 1
–25
–25
–40
°C
Case temperature
Storage temperature 1
95
95
Non operational
100
100
1 MIL-STD-810D section 501.2 and 502.2
2 See: Thermal Considerations
Table 7: MTBF and device hours
MTBF
Ground Fixed
Ground Mobile
Device Hours 1
MTBF acc. to MIL-HDBK-217D
TC = 40°C
160'000
TC = 70°C
TC = 40°C
45'000 h
TC = 70°C
22'000 h
70'000 h
5'100'000 h
1 Statistical values, based on an average of 4300 working hours per year and in general field use.
Edition 4/4.99
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The Power Partners.
PSR Series
Switching Regulators, PCB & Chassis
Industrial Environment
Mechanical Data
Dimensions in mm. Tolerances ±0.3 mm unless otherwise specified.
European
Projection
20.5
Yellow
LED output
voltage indicator
18.7
1.2
6.3
Potentiometer
(option P)
12.2
Go–
Vo+
i
R
Ø 4
Gi–
Vi+
2.7 ±0.2
50.2 ±0.2
Measuring point
of case temperature
min. 5
09016
20.5
6.3
18.7
1.2
2.8 x 0.5
(1.0 x 0.5 option Y)
Fig. 7
Case A01, weight 100 g
Aluminium, black finish
and self cooling
Fig. 8
Case A01 hole locations for circuit board layout (compo-
nent side view of PCB):
- - - = Space reserved for switching regulator
“a” = 3.0 mm x 0.7 mm slot or Ø 3.0 mm, through
plated for hand or machine soldering (fast on)
51.4
“a”
= Ø 1.3...1.5 mm with option Y pins
Safety and Installation Instructions
Cleaning Agents
Installation Instruction
In order to avoid possible damage, any penetration of
cleaning fluids is to be prevented, since the power sup-
plies are not hermetically sealed.
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.
Protection Degree
Check for hazardous voltages before altering any connec-
tions. Connections can be made using fast-on or soldering
technique.
The protection degree is IP 40, IP 20 with option P and for
PSR 52.
The input and the output circuit are not separated, i.e. the
negative path is internally interconnected!
Isolation
Electric strength test voltage between input intercon-
nected with output and case: 750 V DC, 1 s.
The units should be connected to a secondary circuit.
Do not open the module.
This test is performed as factory test in accordance with
IEC/EN 60950 and UL 1950 and should not be repeated in
the field. Melcher will not honour any guarantee claims re-
sulting from electric strength field tests.
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.
Edition 4/4.99
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MELCHER
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Industrial Environment
Switching Regulators, PCB & Chassis
PSR Series
Standards and Approvals
Safety of Operator Accessible Output Circuit
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 and SEV approved to
IEC/EN 60950 and EN 55014 standards.
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.
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.
However, it is the sole responsibility of the installer or user
to assure the compliance with the relevant and applicable
safety regulations.
The switching regulators are subject to manufacturing sur-
veillance in accordance with the above mentioned UL and
CSA and with ISO 9001 standards.
More information is given in: Technical Information: Safety
& EMC.
Table 8: Insulation concept leading to an SELV output circuit
Conditions Front end
Switching regulator
Result
Supply
voltage
Minimum required grade
of isolation, to be provided DC output status of the front end
by the AC-DC front end,
including mains supplied from the
Maximum Minimum required safety
Measures to achieve the
specified safety status of the
output circuit
Safety status of
the switching
regulator output
circuit
voltage
output circuit
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 and earthed 4
Earthed SELV
circuit
considered
as secon-
dary circuit
secondary circuit 2
or non accessible 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 earthed 4 or 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 earthed 4 or 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.
Edition 4/4.99
MELCHER
9/11
The Power Partners.
PSR Series
Switching Regulators, PCB & Chassis
Industrial Environment
Description of Options
i Inhibit for Remote On and Off
06009
Vo+
Vi+
Note: With open i-input, output is enabled (Uo = on).
Iinh
Not available for PSR 52.
i
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.
Uinh
Go–
Gi–
Fig. 10
Definition of Iinh and Uinh
Iinh [mA]
06010
06001
5
Uo/Uo nom
1
4
3
2
0.1
0
t
tf
tr
Uo on
Uo off
1
0
Inhibit
1
t
0
Uinh [V]
-20
-50
Fig. 9
-30
-10
0
-40
10 20 30 40 50
Fig. 11
Output response as a function of inhibit signal
Typical inhibit current Iinh versus inhibit voltage Uinh
Table 9: Inhibit characteristics
Characteristics
Conditions
min
–10
+2.4
typ
max
+0.8
+50
Unit
Uinh
Inhibit input voltage to keep Uo = on
regulator output voltage...
Ui min...Ui max
TC min...TC max
V DC
Uo = off
t r
Switch-on time after inhibit command
Switch-off time after inhibit command
Input current when inhibited
Ui = Ui nom
RL = Uo nom /Io nom
2
4
ms
t f
Ii inh
Ui = Ui nom
10
mA
R Control for Output Voltage Adjustment
Note: With open R input, Uo ≈ 1.08 Uo nom
Vo+
06036
.
Uref
R2
(Exception: With option Y, Uo ≈ 1.00 Uo nom
Option R excludes option P and vice versa.
Not available for PSR 52.
)
4000 Ω
+
–
R
G
R1
The output voltage Uo can either be adjusted with an exter-
nal voltage (Uext) or with an external resistor (R1 or R2).
The adjustment range is 0...108% of Uo nom. The minimum
differential voltage DUio min between input and output (see:
Electrical Input Data) should be maintained. Under-volt-
age lock-out = Minimum input voltage.
Go–
Fig. 13
Voltage adjustment with external resistor R1 or R2
c) Without option Y: Uo = 0...108% Uo nom, using R1
Vo+
06035
4000 Ω • Uo
R1 ≈ ––––––––––––––
1.08 • Uo nom – Uo
1.08 • Uo nom • R1
Uo ≈ ––––––––––––––
R1 + 4000 Ω
Uref
4000 Ω
R
+
–
d) With option Y: Uo = 0...100% Uo nom, using R1
+
Uext
4000 Ω • Uo
R1 ≈ –––––––––––
Uo nom – Uo
Uo nom • R1
Uo ≈ –––––––––––
R1 + 4000 Ω
G
Go–
e) With option Y: Uo = 100...108% Uo nom, using R2
Fig. 12
4000 Ω • Uo • (Uo nom – 2.5 V)
Voltage adjustment with Uext between R and Go–
R2 ≈ ––––––––––––––––––––––––
2.5 V • (Uo – Uo nom
)
a) Without option Y: Uo = 0...108% Uo nom, using Uext
Uo nom • 2.5 V • R2
2.5 V • Uo
ext ≈ –––––––––––
1.08 • Uo nom
Uext
Uo ≈ 1.08 Uo nom • –––––
2.5 V
Uo ≈ ––––––––––––––––––––––––––––––––
2.5 V • (R2 + 4000 Ω) – Uo nom • 4000 Ω
U
b) With option Y: Uo = 0...108% Uo nom
Caution: To prevent damage Uext should not exceed
20 V, nor be negative and R2 should never be less than
47 kΩ.
2.5 V • Uo
Uext
Uo ≈ Uo nom • –––––
2.5 V
U
ext ≈ –––––––––
Uo nom
Edition 4/4.99
10/11
MELCHER
The Power Partners.
Industrial Environment
Switching Regulators, PCB & Chassis
PSR Series
-9 Extended Temperature Range
Note: Not available for PSR 52.
P
Potentiometer
Note: Not available for PSR 52.
The operational ambient temperature range is extended to
TA = –40...71°C. (TC = –40...95°C, TS = –55...100°C.)
Option P excludes option R. The output voltage Uo can be
adjusted with a screwdriver in the range from 0.92...1.08 of
the nominal output voltage Uo nom
.
Y PCB Soldering Pins
However, the minimum differential voltage DUi o min be-
tween input and output voltages as specified in: Electrical
Input Data should be maintained.
This option defines soldering pins of 1.0 × 0.5 × 6.5 mm,
instead of the standard fast-on terminals of 2.8 × 0.5 ×
6.5 mm. Modules with this option can be mounted onto
printed circuit boards, providing through-plated finished
hole size of Ø 1.3...1.5 mm.
The combination of option Y with option R will result in a
different setting of the output voltage (see also description
of: R Control).
Accessories
A variety of electrical and mechanical accessories are
available including:
– Isolation pads for easy and safe PCB-mounting.
– Filters and ring core chockes for ripple and interference
reduction.
– Adaptor kit for DIN-rail and chassis mounting.
Edition 4/4.99
11/11
MELCHER
The Power Partners.
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