H-Family
AC-DC Converters <100 W
Benign Environment
50 W AC-DC Converters
Single output:
Dual output:
Triple output:
series 110H/230H1000
series 110H/230H2000
series 110H/230H3000
H-Family
• Two input voltage ranges suitable for most AC mains
• Efficient input filter and built-in surge and transient
suppression circuitry
• 3 kV
rms
input to output electric strength test
• Outputs individually isolated
• Outputs fully protected against overload
Safety according to IEC 950
LGA
C
Table of Contents
........................................... Page
Description .............................................................. 10 - 62
Type Survey ............................................................ 10 - 63
Safety and Installation Instructions ......................... 10 - 63
Functional Description ............................................ 10 - 64
Electrical Input Data ................................................ 10 - 65
Electrical Output Data ............................................. 10 - 66
EMC and Immunity to Input Transients ................... 10 - 69
Supplementary Data ............................................... 10 - 70
Description of Options ............................................. 10 - 71
Immunity to Environmental Conditions .................... 10 - 75
Mechanical Data ..................................................... 10 - 76
Type Key and Product Marking ............................... 10 - 77
Description
The H-family of AC-DC converters represents a broad and
flexible range of power supplies for use in advanced elec-
tronic systems. Features include high efficiency, reliability
and low output voltage noise.
The converter inputs are protected against surges and tran-
sients occuring at the source lines. An input over- and
undervoltage cut-out circuitry disables the outputs if the in-
put voltage is outside the specified range. The modules in-
clude an inrush current limitation preventing circuit break-
ers and fuses from being damaged at switch-on.
All outputs are open- and short-circuit proof and are pro-
tected against overvoltages by means of built-in suppressor
diodes. The outputs can be inhibited by a logic signal ap-
plied to the connector pin 2(i). If the inhibit function is not
used pin 2 should be connected with pin 23 to enable the
outputs.
LED indicators display the status of the converter and allow
visual monitoring of the system at any time.
Full input to output, input to case, output to case and output
to output isolation is provided. The modules are designed
and built according to the international safety standard
IEC 950 and have been approved by the safety agencies
LGA (Germany) and UL (USA). The UL Mark for Canada
has been officially recognized be regulatory authorities in
provinces across Canada.
The case design allows operation at nominal load up to
50°C in a free air ambient temperature. If forced cooling is
provided, the ambient temperature may exceed 50
°C
but
the case temperature should remain below 80°C under all
conditions.
A temperature sensor generates an inhibit signal which
disables the outputs if the case temperature
T
C
exceeds the
limit. The outputs are automatically re-enabled when the
temperature drops below the limit.
Various options are available to adapt the converters to in-
dividual applications.
The modules may either be plugged into 19 inch rack sys-
tems according to DIN 41494, or be chassis mounted.
Case: aluminium, black finish, self cooling.
Dimensions: 38.7
×
111.2
×
168.5 mm. Weight: 770 g
10.3
10 - 62
MELCHER
The Power Partners.
Edition 2/96 - © Melcher AG
Benign Environment
Type Survey
Options see "Descriptions of Options"
AC-DC Converters <100 W
H-Family
Table 1: Type survey
Output 1
Output 2
Output 3
Input Voltage Range and Efficiency
1
Option
U
o nom
I
o nom
V DC A
5.1
12.0
15.0
24.0
48.0
12.0
15.0
5.1
5.1
1
U
o nom
I
o nom
V DC A
U
o nom
I
o nom
V DC A
U
i min
...U
i max
85...132 V AC
47...63 Hz
110H1001-2R
110H1301-2R
110H1501-2R
110H1601-2R
110H1901-2R
η
min
%
74
81
83
83
85
81
82
79
79
U
i min
...U
i max
187...255 V AC
47...63 Hz
230H1001-2R
230H1301-2R
230H1501-2R
230H1601-2R
230H1901-2R
230H2320-2
230H2540-2
230H3020-2
230H3040-2
η
min
%
74
81
82
82
85
81
82
78
79
V2, V3
D1...D8
8.0
4.0
3.4
2.0
1.0
2.0
1.7
5.0
5.0
12.0
15.0
12.0
15.0
2.0
1.7
0.7
0.6
12.0
15.0
0.7
0.6
110H2320-2
110H2540-2
110H3020-2
110H3040-2
Efficiency measured at
U
i nom
and
I
o nom
Safety and Installation Instructions
Safety
If the output circuit of an AC-DC converter is operator-ac-
cessible according to the IEC 950 related safety standards,
it shall be an SELV circuit (Safety Extra Low Voltage circuit,
i.e. a circuit, separated from mains by at least basic insula-
tion, that is so designed and protected such that under nor-
mal and single fault conditions, the voltage between any
two conductors and between any conductor and earth does
not exceed 60 V DC).
In the following section an interpretation is provided of the
IEC 950 safety standard with respect to the safety status of
the output circuit. However, it is the sole responsibility of the
installer or user to assure the compliance with the relevant
and applicable safety standards:
If the AC-DC converter is installed according to the relevant
safety regulations its outputs are considered to be SELV
circuits up to a nominal output voltage of 36 V.
For safety reasons, the modules must be wired via the
female connector H11 (according to DIN 41612 see sec-
tion "Accessories") in order to meet national and interna-
tional safety requirements!
The connector protective earthing pin is leading. During the
production process, all transformers and each of the fully
assembled modules are individually tested for electric
strength and earth continuity (see "Supplementary Data").
All electric strength tests are performed as factory tests.
Installation Instruction
Installation of the power supply must strictly follow the na-
tional safety regulations. To observe the safety require-
ments according to EN 60950/IEC 950, the module shall be
connected via the female connector type H11 see section
"Accessories". Other installation methods may not meet the
safety requirements. The modules do not incorporate any
fuse. At least one external fuse, installed in the wiring to the
input is essential! See "Fuse types".
Whenever the inhibit function is not required, pin 2 (i)
should be connected to pin 23 to enable the output(s).
Important Advice
Electric strength tests should not be repeated in the field. Improper test methods, for example overshooting or oscillating
test voltages, voltage slopes exceeding 1 kV/µs, internal Y-capacitors not carefully discharged, etc. can cause severe
damage to switching devices and ICs. Melcher AG will not honour any guarantee/warranty claims resulting from high
voltage field tests.
10.3
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
10 - 63
H-Family
Table 2: H11 connector pin allocation
Electrical Determination
Pin
Inhibit control input
Safe Data or ACFAIL
Output voltage (positive)
Output voltage (negative)
Control input +
Control input –
Output voltage (positive)
Output voltage (negative)
Output voltage (positive)
Output voltage (negative)
Protective earthing
1
AC input voltage
AC input voltage
1
AC-DC Converters <100 W
Benign Environment
H1000
Ident
i
D or V
Vo1+
Vo1–
R
G
14
17
20
23
26
29
32
N
P
Vo1+
Vo1–
20
23
26
29
32
Pin
2
5
8
11
2
5
8
11
14
17
H2000
Ident
i
D or V
Pin
2
5
8
11
H3000
Ident
i
D or V
Vo3+
Vo3–
Vo2+
Vo2–
Vo1+
Vo1–
N
P
14
17
20
23
26
29
32
Vo2+
Vo2–
Vo1+
Vo1–
N
P
Leading pin (pregrounding)
Degree of Protection
Condition: Female connector fitted to the unit
IP 40:
All units, except those with options D or V incorporating potentiometer adjustment.
IP 20:
Type fitted with options D or V incorporating potentiometer.
Functional Description
The input voltage is fed via an input filter, an inrush current
limiter and a bridge rectifier to the input capacitor. This ca-
pacitor sources a single transistor forward converter. Each
output is powered by a separate secondary winding of the
main transformer. The resultant voltages are rectified and
their ripples smoothed by a power choke. The control logic
senses the main output voltage
U
o1
and generates, with re-
spect to the maximum admissible output currents, the con-
trol signal for the primary switching transistor. This signal is
fed back via a coupling transformer.
The auxiliary outputs
U
o2
and
U
o3
are unregulated. Each
auxiliary output's current is sensed and transferred to the
main control circuit using a current transformer. If one of the
outputs is driven into current limit, the other outputs will re-
duce their output voltages as well because all output cur-
rents are controlled by the same control circuit.
2
5
Main control circuit
1
1
14
17
20
23
Y
29
Forward converter
approx. 70 kHz
10.3
Input filter
Current
limitation
output 2
14
17
VDR
32
Y
26
Current
limitation
output 3
Y
Y
Y
8
11
Fig. 1
AC-DC converter block diagram
1
Single output modules H1000 (R input)
10 - 64
MELCHER
The Power Partners.
Edition 2/96 - © Melcher AG
Benign Environment
Electrical Input Data
AC-DC Converters <100 W
H-Family
General conditions:
–
T
A
= 25°C, unless
T
C
is specified. – Connector pins 2 and 23 interconnected, R input not connected.
Table 3: Input data
Input
Characteristics
Conditions
min
85
110
0.78
1
7
7
1.5
9
9
2.5
80
200
1100
300
1600
800
8000
570
142
50
0
270
284
µF
V AC
mΩ
110H
typ
max
132
min
187
230
0.44
1
7
7
1.5
9
9
2.5
42
A
µs
A
rms
VA
230H
typ
max
255
Unit
V AC
U
i
Input voltage range
U
i nom
Nominal input voltage
I
i
S
i 0
Input current
No-load apparent input power:
Single output
Double output
Triple output
Idle apparent input power
I
o
= 0…I
o nom
T
C min
…T
C max
U
i nom
,
I
o nom 1
U
i nom
I
o1,2,3
= 0
S
i inh
inhibit mode
I
inr p 3
Peak inrush current
t
inr r
t
inr h
R
i
Rise time
Trailing edge half-life
Input resistance
U
i
=
U
i max
R
S
= 0
Ω
4
T
C
= 25°C
T
C
= 25
°C
450
2000
250
0
R
NTC 2
NTC resistance
C
i
Input capacitance
U
i abs
Input voltage limits
without any damage
1
2
With multiple output modules, the same condition for each output applies.
Initial switch-on cycle. Subsequent switch on/off cycles increase the inrush current peak value.
3
I
inr p
=
U
i
/(R
s
+
R
i
+
R
NTC
)
4
R
= source resistance.
S
Input Under-/Overvoltage Cut-out
If the input voltage remains below 0.6
U
i min
or exceeds
1.1
U
i max
(approx. values), an internally generated inhibit
signal disables the output(s). When checking this function
the absolute maximum input voltage rating
U
i abs
must be
carefully considered (see table above).
Input fuse
The modules do not incorporate any fuse. External fuses in-
stalled in the wiring to the input are essential.
Table 4: Recommended fuse types (slow-blow)
Series
110H
230H
Schurter type
SPT 2.5 A
SPT 2.5 A
250 V
250 V
Part number
0001.2508
0001.2508
Edition 2/96 - © Melcher AG
MELCHER
The Power Partners.
10 - 65
10.3
H-Family
Electrical Output Data
AC-DC Converters <100 W
Benign Environment
General conditions
–
T
A
= 25°C, unless
T
C
is specified.
– Connector pins 2 and 23 interconnected, R input not connected.
Table 5a: Output data
Output
Characteristics
U
o nom
Conditions
min
5.00
5.1 V
typ
max
5.20
-
min
11.76
11.10
12 V
typ
max
12.24
12.90
13.80
21
25
see table 1
see fig. 2
50
200
120
360
±25
±80
50
35
see fig. 3
±15
±10
see fig. 3
±30
±120
±240
120
min
14.70
13.90
15 V
typ
max
15.30
16.10
17.25
25
31
Unit
V
U
o1
U
o2/3
U
o2/3 0
U
o1 L
U
o2/3 L
I
o nom
I
o L
u
o1/2/3
∆
U
o1 U
∆
U
o2/3 U
∆
U
o1 I
∆
U
o2/3 I
∆
U
o1 Ic
∆
U
o2/3 Ic
Output voltage
U
i nom
,
I
o nom 1
U
i min
...U
i max
I
o2/3
= 0
Overvoltage prot.
Failure in
control circuit
-
7.5
-
Output current
Output current
limitation response
U
i min
...
U
i max
T
C min
...T
C max
Output voltage noise
U
i nom
,
I
o nom 1
BW = 20 MHz
Static line regulation
150
450
±30
±100
45
see fig. 4
±15
see fig. 4
±45
±150
±300
150
mV
rms
mV
pp
mV
U
i min
...
U
i nom
U
i nom
...U
i max
I
o nom 1
±20
-
15
-
±50
Static load regulation
U
i nom
I
o
=
I
o nom
...0
2
Static cross load
regulation
3
U
i nom
I
o
=
I
o nom
...0
4
±5
-
Table 5b: Output data
Output
Characteristics
U
o nom
Conditions
min
23.52
24 V
typ
max
24.48
41
see table 1
see fig. 2
240
720
±30
±240
min
47.04
48 V
typ
max
48.96
85
Unit
V
U
o1
U
o L
I
o1 nom
U
o1 L
u
o1
∆
U
o1 U
Output voltage
Overvoltage prot.
Output current
Output current
limitation response
U
i nom
,
I
o1 nom
I
o1 nom
U
i min
...
U
i max
T
C min
...T
C max
Output voltage noise
U
i nom
,
I
o1 nom
BW = 20 MHz
Static line regulation
480
1440
±30
±480
mV
rms
mV
pp
mV
10.3
U
i min
...
U
i nom
U
i nom
...U
i max
I
o1 nom
∆
U
o1 I
1
2
Static load regulation
U
i nom
I
o1
=
I
o1 nom
...0
70
240
150
480
With multiple output modules, the same condition for each output applies.
Condition for specified output. With multiple output modules, other output(s) loaded with constant current
I
o
=
I
o nom
.
3
Condition for non-specified output, individually tested, other output(s) loaded with constant current
I
=
I
o
o nom
.
4
Multiple output modules.
10 - 66
MELCHER
The Power Partners.
Edition 2/96 - © Melcher AG
Analog electronics
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