CXA20 Series
Single and dual output
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4:1 input voltage range
No minimum load on singles
6 A on 3.3 V output (@ 48 Vin) at 50 C in still air
Wide operating temperature with overtemperature
protection
10% output voltage trim
Remote On/Off control
Overvoltage protection
Available RoHS complaint
The CXA20 is a new 20 W 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 Vdc to
75 Vdc, 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 3.3 V, 5 V, 12 V, 5 V and 12 V. The 3.3 V version delivering up to 6 A is
fully rated to 20 W. Typical efficiency for the CXA20 is 83%. 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 EMC CHARACTERISTICS
ETS 300 386-1 table 5
Voltage accuracy 1.0%
Conducted emissions EN55022, ext. cap. (Note 5) Level A
EN55022, external filter, Level B
Line regulation Singles/dual positives 0.1%
VDE0878, 48V models
(LL to HL) Dual negatives 0.1%
Radiated emissions EN55022-B See App. Note 107
Load regulation Full load to minimum load Immunity:
(not incl. cross reg.) S3V3 0.2% ESD air EN61000-4-2 8 kV (NP), 15 kV (RP)
Singles/dual positives 0.1% ESD contact EN61000-4-2 6 kV (NP), 8 kV (RP)
Dual negatives 0.1% EFT DC power EN61000-4-4 2 kV (NP), 4 kV (LFS)
EFT signal EN61000-4-4 1 kV (NP), 2 kV (LFS)
Minimum load Singles None
Radiated field enclosure EN61000-4-3 10 V/m (NP)
Duals (for imbalanced loads) 10%
Surges indoor signal EN61000-4-5 500 V (RP)
Conducted (dc power) EN61000-4-6 10 V (NP)
Ripple and noise S3V3, S05, D05 75 mV pk-pk max.
Conducted (signal) EN61000-4-6 10 V (NP)
20 MHz bandwidth S12, D12 100 mV pk-pk max.
Input transients ETS 300 132-2, ETR 283
All models 20 mV rms max.
GENERAL SPECIFICATIONS
Temperature coefficient 0.02%/C
Efficiency See table
Overvoltage protection See Application Note 107
Overtemp. shutdown 120 C
Short circuit protection Hiccup Continuous
Isolation voltage Input/output test voltage 1500 Vdc
Short <20 m automatic recovery
Switching frequency Fixed 400 kHz
Transient response 25% load step 2.0% max. dev.,
Approvals and standards EN60950
300 s recovery to
(See Notes 6,7,8) UL1950 File No. E136005
within total error band
Material flammability UL94V-0
Load cross regulation 10% load to full load, 7.0%
Weight 26 g (0.92 oz)
(See Note 1) either output
MTBF MIL-HDBK-217F 3,485,000 hours
(Representative model Parts stress method
INPUT SPECIFICATIONS
48S05J @ 48 Vin) Ground Benign @ 25 C
Input voltage range 48 Vin nominal 18-75 Vdc
ENVIRONMENTAL SPECIFICATIONS
Input fuse HRC recommended 2.0 A
Thermal performance Operating ambient -40 C to +60 C,
temperature (See Note 9)
Max. input rise 48 V ETS300-132 5 V/ms
Non-operating -55 C to +125 C
and fall time
ETS 300 019-2-3 Classes T3.1, 3.2, 3.3, 3.5
UVLO turn ON voltage (See Note 4) 92%
Air temperature Low: IEC 68-2-1 -40 C
UVLO turn OFF voltage (See Note 4) 86%
High: IEC 68-2-2 +60 C
Change: IEC 68-2-14 -40 C to +60 C
Remote ON/OFF
Logic compatibility CMOS/TTL/Open Collector
Relative humidity IEC 68-2-56 10% to 100% RH
ON Open circuit or >2 Vdc
IEC 68-2-30 Condensation
OFF <1.2 Vdc
File Name: cxa20.pdf Rev (02): 09 Dec 2005
Converter DC-DC 20 CONVERTERS DC-DCCXA20 Series
Single and dual output
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ti s www s g r
INPUT OUTPUT OVERVOLTAGE OUTPUT TYPICAL MODEL
(2,3) (10,11)
VOLTAGE VOLTAGE PROTECTION CURRENT (MAX.) EFFICIENCY NUMBER
18-75 Vdc 3.3 V 3.7 V 6 A 80% CXA20-48S3V3J
18-75 Vdc 5 V 6.67 V 4 A 83% CXA20-48S05J
18-75 Vdc 12 V 14.25 V 1.66 A 83% CXA20-48S12J
18-75 Vdc 5 V 6.67 V 2 A ea. 84% CXA20-48D05J
18-75 Vdc 12 V 14.25 V 0.83 A ea. 84% CXA20-48D12J
NNootteess
PIN CONNECTIONS
1 Negative output voltage deviation when either load is changed.
PIN NUMBER SINGLE OUTPUT DUAL OUTPUT
2 For TVS/Zener specifications please see Application Note 107.
3 On dual output models, OVP protection is on positive outputs only.
1 + Input + Input
4 With respect to minimum input voltage.
5 With one external 4 F capacitor across the input.
2 Input - Input
6 Unit provides basic insulation up to the 75 Vdc maximum input voltage.
7 Maximum continuous output power not to exceed 20 Watts.
3 No Pin No Pin
8 User must provide 2 A HRC (recommended) in line fuse in order to comply
4 Remote On/Off Remote On/Off
with safety approvals.
9 Download Application Note 107 and the full data sheet from our website.
5 No Pin + Output
10 The J suffix indicates that these parts are Pb-free (RoHS 6/6) compliant.
TSE RoHS 5/6 (non Pb-free) compliant versions may be available on
6 + Output Common
special request, please contact your local sales representative for details.
11 NOTICE: Some models do not support all options. Please contact your
7 - Output - Output
local Artesyn representative or use the on-line model number search tool at
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