DC/DC CONVERTERS 20W DC/DC Converters
1
2 YEAR WARRANTY
CXA20 Series
S i n g l e a n d d u a l o u t p u t
4:1 input voltage range
No minimum load on singles
6A on 3.3V output (@ 48Vin) at 50C in still air
Wide operating temperature with overtemperature
protection
10% output voltage trim
Remote On/Off control
Overvoltage protection
The CXA20 is a new 20W addition to the CXA family of open-frame, isolated, DC/DC
converters. The five model series features a 4:1 input voltage range of 18 to 75VDC,
making it suitable for a wide variety of communications and distributed power
applications. With its 2.0 x 1.6 inch industry standard footprint, the CXA20 provides
an easy upgrade option for new and existing Artesyn customers seeking a high-
performance, cost-effective power supply. The CXA20 is available in output voltages
of 3.3V, 5V, 12V, 5V and 12V. The 3.3V version delivering up to 6A is fully rated to
20W. Typical efficiency for the CXA20 is 83 percent. The CXA20 offers remote on/off,
as well as overvoltage, overtemperature and short circuit protection features.
All specifications are typical at nominal input, full load at 25C unless otherwise stated
EMC CHARACTERISTICS
ETS 300 386-1 table 5
Conducted emissions
EN55022, ext. cap. (Note 5)
Level A
EN55022, external filter,
Level B
VDE0878, 48V models
Radiated emissions
EN55022-B
See App. Note 107
Immunity:
ESD air
EN61000-4-2 8kV (NP), 15kV (RP)
ESD contact
EN61000-4-2 6kV (NP), 8kV (RP)
EFT DC power
EN61000-4-4 2kV (NP), 4kV (LFS)
EFT signal
EN61000-4-4 1kV (NP), 2kV (LFS)
Radiated field enclosure
EN61000-4-3 10V/m (NP)
Surges indoor signal
EN61000-4-5 500V (RP)
Conducted (DC power)
EN61000-4-6 10V (NP)
Conducted (signal)
EN61000-4-6 10V (NP)
Input transients
ETS 300 132-2, ETR 283
GENERAL SPECIFICATIONS
Efficiency
See table
Overtemp. shutdown
120C
Isolation voltage
Input/output test voltage
1500VDC
Switching frequency
Fixed
400kHz
Approvals and standards
EN60950
(See Notes 6,7,8)
UL1950 File No. E136005
Material flammability
UL94V-0
Weight
26g (0.92 oz)
MTBF
MIL-HDBK-217F
400,000 hours
(Representative model
Parts stress method
48S05 @ 48Vin)
Ground Benign @ 25C
ENVIRONMENTAL SPECIFICATIONS
Thermal performance
Operating ambient
-40C to +60C,
temperature
(See Note 9)
Non-operating
-55C to +125C
ETS 300 019-2-3
Classes T3.1, 3.2, 3.3, 3.5
Air temperature
Low: IEC 68-2-1
-40C
High: IEC 68-2-2
+60C
Change: IEC 68-2-14
-40C to +60C
Relative humidity
IEC 68-2-56
10% to 100% RH
IEC 68-2-30
Condensation
OUTPUT SPECIFICATIONS
Voltage accuracy
1.0%
Line regulation
Singles/dual positives
0.1%
(LL to HL)
Dual negatives
0.1%
Load regulation
Full load to minimum load
(not incl. cross reg.)
S3V3
0.2%
Singles/dual positives
0.1%
Dual negatives
0.1%
Minimum load
Singles
None
Duals (for imbalanced loads)
10%
Ripple and noise
S3V3, S05, D05
75mV pk-pk max.
20MHz bandwidth
S12, D12
100mV pk-pk max.
All models
20mV rms max.
Temperature coefficient
0.02%/C
Overvoltage protection
See Application Note 107
Short circuit protection
Hiccup
Continuous
Short <20m
automatic recovery
Transient response
25% load step
2.0% max. dev.,
300s recovery to
within total error band
Load cross regulation
10% load to full load,
7.0%
(See Note 1)
either output
INPUT SPECIFICATIONS
Input voltage range
48Vin nominal
18 to 75VDC
Input fuse
HRC recommended
2.0A
Max. input rise
48V ETS300-132
5V/ms
and fall time
UVLO turn ON voltage
(See Note 4)
92%
UVLO turn OFF voltage
(See Note 4)
86%
Remote ON/OFF
Logic compatibility
CMOS/TTL/Open Collector
ON
Open circuit or >2VDC
OFF
<1.2VDC
SPECIFICATIONS
File Name: CXA20.PDF Rev: 11 Jan 2002
For the most current data and application support visit www.artesyn.com/powergroup/products.htm
Notes
1
Negative output voltage deviation when either load is changed.
2
For TVS/Zener specifications please see Application Note 107.
3
On dual output models, OVP protection is on positive outputs only.
4
With respect to minimum input voltage.
5
With one external 4F capacitor across the input.
6
Unit provides basic insulation up to the 75VDC maximum input voltage.
7
Maximum continuous output power not to exceed 20 Watts.
8
User must provide 2A HRC (recommended) in line fuse in order to comply
with safety approvals.
9
Download Application Note 107 and the full data sheet from our website.
CXA20 Series
S i n g l e a n d d u a l o u t p u t
DC/DC CONVERTERS 20W DC/DC Converters
2
Please consult our website for the following items:
Application Note
Longform Data Sheet
www.artesyn.com
File Name: CXA20.PDF Rev: 11 Jan 2002
CAUTION: Hazardous internal voltages and high temperatures.
Ensure that unit is not user accessible.
INPUT
OUTPUT
OVERVOLTAGE
OUTPUT
TYPICAL
MODEL
VOLTAGE
VOLTAGE
PROTECTION
(2,3)
CURRENT (MAX.)
EFFICIENCY
NUMBER
18-75VDC
3.3V
3.7V
6.0A
80%
CXA20-48S3V3
18-75VDC
5.0V
6.67V
4.0A
83%
CXA20-48S05
18-75VDC
12V
14.25V
1.66A
83%
CXA20-48S12
18-75VDC
5V
6.67V
2.0A ea.
84%
CXA20-48D05
18-75VDC
12V
14.25V
0.83A ea.
84%
CXA20-48D12
PIN CONNECTIONS
PIN NUMBER
SINGLE OUTPUT
DUAL OUTPUT
1
+ Input
+ Input
2
Input
- Input
3
No Pin
No Pin
4
Remote On/Off
Remote On/Off
5
No Pin
+ Output
6
+ Output
Common
7
- Output
- Output
8
Trim
Trim
Derating Curve Output Current vs Temperature S3V3
Natural Convection (<0.1m/s airflow)
-40C
0
20
40
60
80
100
Ambient Temperature
Rated Output Curr
ent
-20C
0
20
40
60
80
100
75%
MAX. TEMPERATURES FOR FULL RATED OUTPUT CURRENT
MODEL
FULL Vin RANGE
Vin <60VDC
48S3V3
50C
50C
48S05
55C
60C
48S12
50C
55C
48D05
55C
60C
48D12
50C
60C
TRIM
DOWN
+ Output
TRIM
UP
Trim
- Output
EXTERNAL OUTPUT TRIMMING
All models can be externally trimmed by 10% using either
method shown below. See Application Note 107 for details.
STAND-OFFS
4 PLACES
0.040
0.002
(1.02
0.05)
2.00
0.02
(50.80
0.5)
1.80
(45.72)
1
ALL DIMENSIONS IN INCHES (mm)
General tolerance
0.010 (
0.25)
unless otherwise specified
2
4
5
6
7
8
0.02
0.004
(0.50
0.1)
1.60
0.02
(40.64
0.5)
0.70
(17.78)
0.20
(5.08)
0.10
(2.54)
0.30
(7.62)
0.70
(17.78)
0.50
(12.70)
0.60
(15.24)
0.14
0.02
(3.60
0.5)
0.413
(10.50)
MAX.
OPEN
FRAME
HEIGHT
BOTTOM
VIEW
Data Sheet Artesyn Technologies 2002
The information and specifications contained in this data sheet are believed to be correct at time of publication. However, Artesyn Technologies accepts no responsibility for consequences arising
from printing errors or inaccuracies. Specifications are subject to change without notice. No rights under any patent accompany the sale of any such product(s) or information contained herein.
For the most current data and application support visit www.artesyn.com/powergroup/products.htm
CXA20 Series
S i n g l e a n d d u a l o u t p u t
DC/DC CONVERTERS 20W DC/DC Converters
3
Please consult our website for the following items:
Application Note
Longform Data Sheet
www.artesyn.com
File Name: CXA20.PDF Rev: 11 Jan 2002
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