Cassette Style
DC-DC Converters
H Series
50 Watt DC-DC Converters
Wide input voltage ranges up to 60 V DC
1, 2 or 3 outputs up to 48 V DC
3 kV DC I/O electric strengh test voltage
• Wide input voltage range suitable for battery operation
• Efficient input filter and built-in surge and transient
suppression circuitry
• Outputs individually isolated
• Outputs fully protected against overload
Safety according to IEC/EN 60950
LGA
H Series
Summary
The H series of DC-DC converters represents a broad and
flexible range of power supplies for use in advanced elec-
tronic systems. Features include high efficiency, reliability
and reasonable 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.
All outputs are open- and short-circuit proof and are pro-
tected against overvoltages by means of built-in suppres-
sor diodes. The outputs can be inhibited by a logic signal
applied to the connector pin 2 (i). If the inhibit function is not
used pin 2 should be connected to pin 23 to enable the out-
puts.
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/EN 60950 and have been approved by the safety
39
1.54"
8 TE
168
6.6"
111
4.37"
3U
agencies LGA (Germany) and UL (USA). The UL Mark for
Canada has been officially recognized by regulatory au-
thorities 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.
Table of Contents
Page
Page
Electromagnetic Compatibility (EMC) ............................ 10
Mechanical Data ............................................................ 11
Immunity to Environmental Conditions ........................... 12
Safety and Installation Instructions ................................ 12
Description of Options .................................................... 15
Accessories .................................................................... 19
Summary .......................................................................... 1
Type Survey and Key Data .............................................. 2
Type Key .......................................................................... 2
Functional Description ...................................................... 3
Electrical Input Data ......................................................... 4
Electrical Output Data ...................................................... 5
Auxiliary Functions ........................................................... 8
Edition 5/5.2000
1/19
Cassette Style
Type Survey and Key Data
Table 1: Type survey
Output 1
Output 2
Output 3
DC-DC Converters
H Series
Input Voltage Range and Efficiency
1
Option
h
min
[%]
76
82
83
85
86
82
83
79
80
V2, V3
D1...D8
-7
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
2
U
o nom
I
o nom
[V DC] [A]
-
-
-
-
-
12.0
15.0
12.0
15.0
-
-
-
-
-
2.0
1.7
0.7
0.6
U
o nom
I
o nom
[V DC] [A]
-
-
-
-
-
-
-
12.0
15.0
-
-
-
-
-
-
-
0.7
0.6
U
i min
...U
i max
8...15 V DC
2
12H1001-2R
12H1301-2R
12H1501-2R
12H1601-2R
12H1901-2R
2
12H2320-2
12H2540-2
12H3020-2
12H3040-2
h
min
[%]
73
79
80
81
83
79
80
77
77
U
i min
...U
i max
14...30 V DC
2
24H1001-2R
24H1301-2R
24H1501-2R
24H1601-2R
24H1901-2R
2
24H2320-2
24H2540-2
24H3020-2
24H3040-2
h
min
[%]
75
82
82
83
85
80
81
78
79
U
i min
...U
i max
28...60 V DC
2
48H1001-2R
48H1301-2R
48H1501-2R
48H1601-2R
48H1901-2R
2
48H2320-2
48H2540-2
48H3020-2
48H3040-2
8.0
4.0
3.4
2.0
1.0
2.0
1.7
5.0
5.0
1
Efficiency
measured at
U
i nom
and
I
o nom
Input voltage range 12H1901-2R: 9...15 V DC, 24H1901-2R: 18...30 V DC, 48H1901-2R: 36...60 V DC
Type Key and Product Marking
Type Key
Input voltage range
U
i
:
8...15 V DC ............. 12
14...30 V DC ............. 24
28...60 V DC ............. 48
48 H 2 5 40 -2 R D V
Series .............................................................................. H
Number of outputs ...................................................... 1...3
Output 1,
U
o1 nom
:
5.1 V
12 V
15 V
24 V
48 V
............... 0
............... 3
............... 5
............... 6
............... 9
Single output modules ................................................... 01
12 V ............. 20
Output 2 and 3,
U
o2 nom
,
U
o3 nom
:
15 V ............. 40
Options and features:
Ambient temperature range
T
A
–10...50°C ..................... -2
Extended temperature range
T
A
–25...71°C .................... -7
Output voltage control input (single output modules only)R
Save data signal (D1...D8, to be specified) ..................... D
1
ACFAIL signal (V2, V3, to be specified) ........................... V
1
1
Option D excludes option V and vice versa
Example:
48H1501-2RD3: DC-DC converter, input voltage range 28...60 V, providing output with 15 V/3.4 A; equipped
with an output voltage control input and undervoltage monitoring.
Edition 5/5.2000
2/19
Cassette Style
Functional Description
DC-DC Converters
H Series
The input voltage is fed via an input filter to the input capaci-
tor. This capacitor sources a single transistor forward con-
verter. 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 gener-
ates, with respect to the maximum admissible output cur-
rents, the control 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.
03067
2
5
i
D/V
R
G
Main control circuit
1
1
14
17
20
Y
Vi+
29
23
Forward converter
approx. 70 kHz
Input filter
C
MKT
Current
limitation
output 2
C
MKT
Current
limitation
output 3
Y
Y
Y
8
14
17
Vi–
32
Y
26
11
1
Single output modules H1000 (R input)
Fig. 1
DC-DC converter block diagram
Edition 5/5.2000
3/19
Cassette Style
Electrical Input Data
DC-DC Converters
H Series
General conditions:
–
T
A
= 25°C, unless
T
C
is specified.
– Connector pins 2 and 23 interconnected, R input not connected.
Table 2: Input data
Input
Characteristics
Conditions
min
8
9
12
12H
typ
max
15
15
min
14
18
24
2.5
1.5
6
6
2
380
60
110
50
75
80
3300
20
750
0
1200
40
175
190
0
300
80
1
4
4
1.5
6
6
2
380
20
40
mΩ
µF
V DC
24H
typ
max
30
30
min
28
36
48
1.3
1
4
4
1.5
6
6
2
350
A
µs
A
W
48H
typ
max
60
60
Unit
V DC
U
i
Operating input voltage
I
o
= 0…I
o nom
T
…
T
C max
..H1901-2R
C min
U
i nom
Nominal input voltage
I
i
P
i 0
Input current
No-load input power:
Single output
Double output
Triple output
Idle input power
U
i nom
,
I
o nom 1
U
i nom
I
o1,2,3
= 0
5.0
1
4
4
P
i inh
inhibit mode
I
inr p 3
Peak inrush current
t
inr r
t
inr h
R
i
C
i
Rise time
Time to half value
Input resistance
Input capacitance
U
i
=
U
i max
R
S
= 0
Ω
2
T
C
= 25°C
T
C
= 25°C
40
2200
0
U
i abs
Input voltage limits
without any damage
1
2
With multiple output modules, the same condition for each output applies.
R
S
= source resistance
3
I
inr p
=
U
i
/(R
s
+
R
i
)
Input Under-/Overvoltage Lock-out
If the input voltage remains below 0.8
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:
Electrical Input Data).
Be-
tween
U
i min
and the undervoltage lock-out level the output
voltage may be below the value defined in table:
Output
data
(see:
Technical Information: Measuring and Testing).
Reverse Polarity
The unit is not protected against reverse polarity at the in-
put. (Reverse polarity will cause the external fuse to blow.)
Input Fuse
The modules do not incorporate any fuse. External fuses
installed in the wiring to the inputs are essential.
Table 3: Recommended fuse types
Series
12H
24H
48H
Schurter type
SPT
SPT
SPT
10 A
8A
3.15 A
250 V
250 V
250 V
Part number
0001.2514
0001.2513
0001.2509
Edition 5/5.2000
4/19
Cassette Style
Electrical Output Data
DC-DC Converters
H Series
General conditions
–
T
A
= 25°C, unless
T
C
is specified.
– Connector pins 2 and 23 interconnected, R input not connected.
Table 4a: Output data
Output
Characteristics
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:
Type Survey and Key Data
see fig.:
Typical output voltage U
o1
versus output currents I
o
30
60
50
200
±50
-
50
-
±5
-
±15
60
70
100
200
±100
±150
150
see:
H2320/H3020
=
D
U
o 2/3
vers. I
o 2/3
±10
±30
50
75
80
200
±100
±150
150
see:
H2540/H3040
=
D
U
o 2/3
vers. I
o 2/3
±15
±45
mV
mV
pp
25
31
min
14.70
13.90
15 V
typ
max
15.30
16.10
17.25
Unit
V
U
o1
U
o2/3
U
o2/3 0
U
o1 P
U
o2/3 P
I
o nom
I
o L
u
o1/2/3
Output voltage
U
i nom
,
I
o nom 1
U
i min
...U
i max
I
o2/3
= 0
Output overvoltage
protection
Output current
Output current
limitation response
-
7.5
-
U
i min
...U
i max
T
C min
...T
C max
Output Switch. freq.
U
i nom
,
I
o nom 1
voltage
IEC/EN 61204
Total
noise
BW = 20 MHz
Static line regulation
D
U
o1 U
D
U
o2/3 U
D
U
o1 I
D
U
o2/3 I
D
U
o1 Ic
D
U
o2/3 Ic
U
i min
...U
i nom
U
i nom
...U
i max
I
o nom 1
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
see:
H2320/H3020
=
D
U
o 2/3
vers. I
o 2/3
see:
H2540/H3040
=
D
U
o 2/3
vers. I
o 2/3
Table 4b: Output data
Output
Characteristics
Conditions
min
23.52
41
24 V
typ
max
24.48
min
47.04
85
48 V
typ
max
48.96
Unit
V
U
o1
U
o P
I
o1 nom
I
o1 L
u
o1/2/3
Output voltage
Overvoltage prot.
Output current
Output current
limitation response
U
i nom
,
I
o1 nom
U
i min
...U
i max
T
C min
...T
C max
see:
Type Survey and Key Data
see:
Typical output voltage U
o1
versus output currents I
o
30
75
50
200
±150
20
35
40
150
±150
mV
mV
pp
Output Switch. freq.
U
i nom
,
I
o nom 1
voltage
IEC/EN 61204
Total
noise
BW = 20 MHz
Static line regulation
D
U
o1 U
U
i min
...U
i nom
U
i nom
...U
i max
I
o1 nom
D
U
o1 I
1
2
3
4
Static load regulation
U
i nom
I
o1
=
I
o1 nom
...0
150
150
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
.
Condition for non-specified output, individually tested, other output(s) loaded with constant current
I
o
=
I
o nom
.
Multiple output modules.
Edition 5/5.2000
5/19
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