CXA20 Series
DC/DC CONVERTERS
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•
•
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20W DC/DC Converters
Single and dual output
1
4:1 input voltage range
No minimum load on singles
6A on 3.3V output (@ 48Vin) at 50˚C in still air
Wide operating temperature with overtemperature
protection
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±10% output voltage trim
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Remote On/Off control
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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.
2 YEAR WARRANTY
All specifications are typical at nominal input, full load at 25°C unless otherwise stated
SPECIFICATIONS
OUTPUT SPECIFICATIONS
Voltage accuracy
Line regulation
(LL to HL)
Load regulation
(not incl. cross reg.)
Singles/dual positives
Dual negatives
Full load to minimum load
S3V3
Singles/dual positives
Dual negatives
Singles
Duals (for imbalanced loads)
S3V3, S05, D05
S12, D12
All models
±1.0%
±0.1%
±0.1%
±0.2%
±0.1%
±0.1%
None
10%
EMC CHARACTERISTICS
ETS 300 386-1 table 5
Conducted emissions
Radiated emissions
Immunity:
ESD air
ESD contact
EFT DC power
EFT signal
Radiated field enclosure
Surges indoor signal
Conducted (DC power)
Conducted (signal)
Input transients
EN55022, ext. cap. (Note 5)
Level A
EN55022, external filter,
Level B
VDE0878, 48V models
EN55022-B
See App. Note 107
EN61000-4-2 8kV (NP), 15kV (RP)
EN61000-4-2 6kV (NP), 8kV (RP)
EN61000-4-4 2kV (NP), 4kV (LFS)
EN61000-4-4 1kV (NP), 2kV (LFS)
EN61000-4-3 10V/m (NP)
EN61000-4-5 500V (RP)
EN61000-4-6 10V (NP)
EN61000-4-6 10V (NP)
ETS 300 132-2, ETR 283
Minimum load
Ripple and noise
20MHz bandwidth
Temperature coefficient
Overvoltage protection
Short circuit protection
Short <20mΩ
Transient response
75mV pk-pk max.
100mV pk-pk max.
20mV rms max.
±0.02%/°C
GENERAL SPECIFICATIONS
Efficiency
Overtemp. shutdown
Isolation voltage
Switching frequency
Approvals and standards
(See Notes 6,7,8)
Material flammability
Weight
MTBF
(Representative model
48S05 @ 48Vin)
See table
120˚C
Input/output test voltage
1500VDC
Fixed
400kHz
EN60950
UL1950 File No. E136005
UL94V-0
26g (0.92 oz)
MIL-HDBK-217F
400,000 hours
Parts stress method
Ground Benign @ 25°C
See Application Note 107
Hiccup
25% load step
Continuous
automatic recovery
±2.0% max. dev.,
300µs recovery to
within total error band
±7.0%
Load cross regulation
(See Note 1)
INPUT SPECIFICATIONS
Input voltage range
Input fuse
Max. input rise
and fall time
UVLO turn ON voltage
UVLO turn OFF voltage
Remote ON/OFF
Logic compatibility
ON
OFF
10% load to full load,
either output
48Vin nominal
HRC recommended
48V ETS300-132
(See Note 4)
(See Note 4)
18 to 75VDC
2.0A
5V/ms
92%
86%
ENVIRONMENTAL SPECIFICATIONS
Thermal performance
Operating ambient
-40°C to +60°C,
temperature
(See Note 9)
Non-operating
-55°C to +125°C
Classes T3.1, 3.2, 3.3, 3.5
Low: IEC 68-2-1
-40°C
High: IEC 68-2-2
+60°C
Change: IEC 68-2-14
-40°C to +60°C
IEC 68-2-56
10% to 100% RH
IEC 68-2-30
Condensation
File Name: CXA20.PDF Rev: 11 Jan 2002
ETS 300 019-2-3
Air temperature
CMOS/TTL/Open Collector
Open circuit or >2VDC
<1.2VDC
Relative humidity
ARTESYN [ ARTESYN TECHNOLOGIES ]
