CompactPCI
®
CPA, CPD Series Data Sheet
200 – 550 Watt AC-DC and DC-DC Converters
233.3
7.8"
6U
162.5
6.4"
100
3.94"
3U
40.6
1.6"
8 HP
40.4
1.6"
8 HP
162.5
6.4"
Features
• RoHS lead-free-solder and lead-solder-exempted
products available
• Compliant to PICMG
®
CompactPCI
®
specifications
Description
The CPA and CPD Series are highly reliable power supplies
for CompactPCI
®
systems, which are increasingly used in
communications, industrial, military, aerospace, and other
applications. These power supplies offer high power density
in plug-in modules that meet the requirements of the PICMG
®
power interface specification for CompactPCI
®
systems.
The converters use the patented EDGE
TM
technology and
provide important advantages such as flexible output power,
extremely high efficiency, excellent reliability, full input-to-
output isolation, negligible inrush current, hot-swap capability,
soft start, and overtemperature protection.
The input is protected by a transient suppressor (varistor)
against surges and transients occurring on the source lines
and cover an operating input voltage range from either 90 to
264 VAC or 36 to 75 VDC.
The outputs are protected against continuous overload, open-
circuit, and short-circuit. Full n+1 redundant operating mode is
made possible by integrated ORing FETs or ORing diodes.
When several converters are connected in parallel, a single-
• Wide range DC or AC input with PFC
• Extremely high efficiency and high power density
• Low inrush current
• 4 high current outputs with flexible load distribution
• Integrated ORing FETs / diodes for true redundancy
• Inhibit and enable inputs
• Remote sense lines
• Single-wire current share function for 3 outputs
• Hot-swap capability
• 47 pin connector, type Positronic
• Overtemperature, overvoltage, overcurrent, and over-
power protection
Safety-approved to the latest edition of UL/CSA 60950-1
and IEC/EN 60950-1.
Table of Contents
Page
Page
Electromagnetic Compatibility (EMC) ................................ 13
Immunity to Environmental Conditions .............................. 15
Mechanical Data ................................................................. 16
Safety and Installation Instructions .................................... 17
Options ............................................................................... 19
Description ........................................................................... 1
Model Selection .................................................................... 2
Functional Description ......................................................... 3
Electrical Input Data ............................................................. 5
Electrical Output Data ........................................................... 7
Auxiliary Functions .............................................................. 10
Copyright © 2017, Bel Power Solutions Inc. All rights reserved.
BCD20005-G Rev AJ, 13-Jan-2017
MELCHER
The Power Partners.
Page 1 of 19
CompactPCI
®
CPA, CPD Series Data Sheet
200 – 550 Watt AC-DC and DC-DC Converters
wire connection between converters ensures proper current
sharing.
The converters are designed with two or three separate
forward converters with fixed switching frequency and
synchronous rectifiers at their output.
LEDs on the front panel and various warning signals display
the status of the converter. The aluminum case acts as a heat
sink and as an RFI shield. It is designed for vertical insertion
into 19" rack systems, but it can also be mounted in any other
position, as long as the necessary airflow is ensured. The
connector is a 47 pin type from Positronic or similar.
Several options are available to meet different requirements.
Model Selection
Table 1: Standard models
Model
No.
CPD200-4530G
Vo1
Vo2
Vo3
Vo4
Vo1
Vo2
Vo3
Vo4
Vo1
Vo2
Vo3
Vo4
Vo1
Vo2
Vo3
Vo4
Vo1
Vo2
Vo3
Vo4
Vo1
Vo2
Vo3
Vo4
Vo1
Vo2
Vo3
Vo4
Output
V
o nom
[ V]
5.0
3.3
12
–12
5.0
3.3
12
–12
5.0
3.3
12
–12
5.0
3.3
12
–12
5.0
3.3
12
–12
5.0
3.3
12
–12
5.0
3.3
12
–12
I
o nom
[A]
20
20
2.5
0.5
25
20
4
1
40
50
8
3
20
20
2.5
0.5
25
20
4
1
40
50
8
3
50
50
8
3
I
o max
[A]
40
40
5.5
2
40
40
5.5
2
50
60
12
4
40
40
5.5
2
40
40
5.5
2
50
60
12
4
50
60
12
4
90...(230)...264
VAC
47 – 63 Hz
3
Operating input Rated power
1
range
V
i min
–
V
i max
f
i min
–
f
i max
36...(48)...75 VDC
P
o nom1
[W]
200
Efficiency
2
η
min
[%]
80
typ
[%]
83.2
3U x 8HP
non-G
Case
Options
4
CPD250-4530G
250
80
81.7
3U x 8HP
L , A, C
non-G
CPD500-4530G
500
83
84.5
6U x 8HP
C
CPA200-4530G
200
81.5
83.7
3U x 8HP
non-G
CPA250-4530G
250
81.5
83.2
3U x 8HP
L , A, C
non-G
CPA500-4530
500
83
85
6U x 8HP
L, A, F, C,
non-G
CPA550-4530
550
83
84.7
6U x 8HP
non-G
1
2
3
4
The sum of the power of all outputs may not exceed the total power for the specified required forced-air cooling.
Efficiency at
T
A
= 25 °C,
V
i nom
,
I
o nom
.
Rated input voltage range is 100 – 240 VAC, rated input frequency range is 50 – 60 Hz.
RoHS is standard, marked with G at the end of the part number. Non G versions only on request.
Note:
The sequence of options in the model designation must
follow the order above. G is always placed at the end.
NFND: Not for new designs
Preferred for new designs
BCD20005-G Rev AJ, 13-Jan-2017
MELCHER
The Power Partners.
Page 2 of 19
CompactPCI
®
CPA, CPD Series Data Sheet
200 – 550 Watt AC-DC and DC-DC Converters
Product Marking
Label with specific type designation, applicable safety
approvals and recognition marks, CE mark, warnings,
patents, company logo, input voltage range, nominal output
voltages and output currents, degree of protection, batch no.,
serial no., and data code including production site,
modification status, and date of production.
Identification of LEDs on the front panel.
Functional Description
The inputs of all converters are protected against surges and
transients occurring on the source lines. A highly efficient input
filter and an active inrush current limiter ensure a very low
inrush current of short duration. This prevents circuit breakers
and fuses from tripping at switch-on.
All CPA models have an additional bridge rectifier and a boost
converter to provide active power factor correction (PFC)
according to EN 61000-3-2.
The CPx200/250 models (see fig.1a) are equipped with two
independent high efficient 2-switch forward converters,
switching 180° out of phase to minimize the ripple current at
the input.
On the secondary side, two high-current synchronous
rectifiers supply Vo1 (5 V) and Vo2 (3.3 V) with up to 40 A. The
secondary-controlled Vo3 (+12 V) post regulator is supplied by
an additional winding of the 3.3 V main transformer. The linear
regulator for Vo4 (–12 V) is supplied from the output choke of
the Vo3 output. The output filters reduce ripple and noise to a
minimum without compromising the dynamic response.
The models CPD500 (fig. 1b) and CPA500/550 (fig. 1c) exhibit
1
a third forward converter for both outputs Vo3 and Vo4. The
outputs Vo1 an Vo2 provide up to 50 and 60 A.
All outputs are fully regulated and protected from the bus by
decoupling FETs or diodes. A current monitor calculates the
output power. As soon as the output power exceeds the
maximum threshold level, the converter starts to reduce the
output power by decreasing the output voltages.
In contrast to the outputs Vo1 (5 V), Vo2 (3.3 V), and Vo3 (+12 V)
with active current sharing, output Vo4 (
–
12 V) has a droop
characteristic for passive current sharing.
If for some reason the voltage of any output exceeds the nominal
value significantly, the converter is permanently shut down. If
option L is fitted, this occurs as well, if the max. output current
is exceeded for a predefined time. To reset, the input voltage
must be removed for a short time.
Melcher's Efficient Dual Geometric Edge Technology
(EDGE
TM
) facilitates high current density, increases reliability
by reducing component stresses, and decreases the amount
of heat dissipated. The backbone of this patented technology
is an interleaved, multi-channel forward converter utilising a
transitional resonant switching technique and proprietary
Only CPA models have a bridge
rectifier and a boost converter
03110f
Boost converter
≈135
kHz
1
Secondary
control
circuit
ACN
+DCIN
46
Input filter
Bridge
rectifier
1
ACL
–DCIN
47
+
C
b
Primary
control
circuit
C
Y
Forward
converter
≈135
kHz
+
C
Y
ORing
FET
V
o1
+
Fuse
45
RTN
(22)
INH#
39
EN#
27
Primary
control
circuit
C
Y
Forward
converter
≈135
kHz
+
C
Y
Secondary
control
circuit
Inrush
current
limiter
ORing
FET
V
o2
+
+
Inhibit
logic
C
Y
Secondary
control
circuit
ORing
FET
V
o3
+
Fig. 1a
Block diagram of CPA/CPD200 and CPA/CPD250
models. For the pin allocation, see Mechanical Data.
BCD20005-G Rev AJ, 13-Jan-2017
C
y
MELCHER
The Power Partners.
+
Linear
regulator
ORing
diode
V
o4
–
+
Page 3 of 19
CompactPCI
®
CPA, CPD Series Data Sheet
200 – 550 Watt AC-DC and DC-DC Converters
leading and trailing-edge pulse-width modulation. It has a
proven track record in high-availability power solutions.
The switching frequency is typically 135 kHz. Recent models
(CPD200/250 version V119 or later, CPA200/250 version
V117 or later, CPA500/550 version V110 or later, not CPD500)
exhibit a crystal oscillator with 131 kHz.
+DCIN
46
JM041a
All models have a separate auxiliary supply for the primary
circuits, the CPD500 as well for the secondary circuits. The
secondary bias voltage of the other models is generated by
the forward converters. Only the forward converters are
controlled by the inhibit and enable inputs; see
Auxiliary
Functions.
Inrush current limiter with
reverse polarity protecton
Dual interleaved boost
converter
≈105
kHz
V
i
Input filter
Secondary
control
circuit
C
b
Primary
control
circuit
C
Y
+
Forward
converter
≈135
kHz
+
C
Y
ORing
FET
V
o1
+
–DCIN
47
Fuse
VDR
C
Y
45
V
PBias
Primary
control
circuit
Forward
converter
≈135
kHz
V
SBias
+
C
Y
Secondary
control
circuit
ORing
FET
V
o2
+
RTN
(22)
INH#
39
EN#
27
Inhibit
logic
Primary
control
circuit
Forward
converter
≈135
kHz
+
C
Y
Secondary
control
circuit
Auxiliary
con-
verter
ORing
FET
V
o3
+
Secondary
control
circuit
Fig. 1b
Block diagram of CPD500 models.
For the pin allocation, see Mechanical Data.
+
C
Y
ORing
diode
V
o4
–
+
ACN
46
V
i
JM014b
2
nd
fuse
(option F)
Boost converter
≈135
kHz
C
Y
Input filter
Primary
control
circuit
C
b
+
Forward
converter
≈135
kHz
Secondary
control
circuit
+
C
Y
ORing
FET
V
o1
+
Fuse
Bridge
rectifier
ACL
47
45
V
PBias
Primary
control
circuit
C
Y
Auxiliary
con-
verter
Forward
converter
≈135
kHz
+
C
Y
Secondary
control
circuit
Inrush
current
limiter
ORing
FET
V
o2
+
RTN
(22)
INH#
39
EN#
27
Inhibit
logic
Primary
control
circuit
Forward
converter
≈135
kHz
V
SBias
+
C
Y
Secondary
control
circuit
ORing
FET
V
o3
+
Secondary
control
circuit
Fig. 1c
Block diagram of CPA500/550 models.
For the pin allocation, see Mechanical Data.
BCD20005-G Rev AJ, 13-Jan-2017
+
C
Y
ORing
diode
V
o4
–
+
MELCHER
The Power Partners.
Page 4 of 19
CompactPCI
®
CPA, CPD Series Data Sheet
200 – 550 Watt AC-DC and DC-DC Converters
Electrical Input Data
General Conditions:
T
A
= 25 °C, unless
T
C
is specified.
Table 2a: Input data of CPD models
Input
Characteristics
V
i
V
i nom
V
i abs
I
i
I
i max
I
inr p
P
i0
Operating input voltage
Nom. input voltage
Input voltage limits
Typical input current
Max. input current
Peak inrush current
No-load input power
Conditions
I
o
= 0 –
I
o max
T
C min
–
T
C max
≤
60 s, no damage
V
i nom
,
I
o nom
V
i min
,
I
o nom
V
i max
,
I
o nom
V
i min
,
I
o
= 0
V
i nom
,
I
o
= 0
V
i max
,
I
o
= 0
14
18
27
0
5.1/6.3
2
7.0/8.7
2
7.6/9.5
2
12
28.6
28
27.5
min
36
48
80
0
12.5
17
17.5
25
W
31
9.4
15
135
5
5
150
200
1500
µF
kHz
ms
CPD200/250
typ
max
75
min
36
48
80
A
CPD500
typ
max
75
VDC
Unit
30
3.2
P
i inh
C
i
f
switch
t
h
t
bo
t
su
Input power, when inhibited
V
i min
–
V
i max
Input capacitance
Switching frequency
Hold-up time
Brown-out time
4
Start-up time
V
i nom
,
I
o nom
V
i min
→
0 V,
I
o nom
V
i nom
,
I
o nom
V
i nom
,
I
o nom
4
4
1360
135
Table 2b: Input data of CPA models
Input
Characteristics
V
i
V
i op
V
i nom
V
i abs
I
i
I
i max
I
inr p
P
i0
P
i inh
C
i
f
switch
t
h
t
bo
t
su
Rated input voltage range
Operating input voltage
Nom. input voltage
Input voltage limits
Typical input current
Max. input current
Peak inrush current
No-load input power
Conditions
I
o
= 0 –
I
o max
T
C min
–
T
C max
50 – 60 Hz
1
≤
60 s, no damage
V
i nom
,
I
o nom
V
i min
,
I
o nom
V
i max
,
I
o nom
V
i min
–
V
i max
I
o
= 0
23
0
1.1/1.4
2
2.9/3.6
2
3.2 /4.0
2
15
30
3.2
1
V
i nom
,
I
o nom
V
i min
→
0 V,
I
o nom
V
i nom
,
I
o nom
V
i nom
,
I
o nom
V
i nom
,
I
o nom
0.95
150
0.95
150
W/VA
20
135
20
4
135
26
min
100
90
230
280
0
2.8/3.1
3
7.1/7.8
3
20
32
3.2
µF
kHz
ms
W
CPA200/250
typ
max
240
264
min
100
90
230
280
A
CPA500/550
typ
max
240
264
VAC
1
Unit
Input power, when inhibited
V
i min
–
V
i max
Input capacitance
Switching frequency
Hold-up time
Brown-out time
4
Start-up time
Power factor
1
2
3
4
Rated input frequency: 50 – 60 Hz, operating input frequency range: 47 – 63 Hz
First value for CPD/CPA200, 2
nd
value for CPD/CPA250
First value for CPA500, 2
nd
value for CPA550
Short interruption of
V
i
without affecting the outputs (EN 61000-4-11)
BCD20005-G Rev AJ, 13-Jan-2017
MELCHER
The Power Partners.
Page 5 of 19
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