CXA20 SERIES
Single and dual output
[ 2 YEAR WARRANTY ]
• 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
• ±10% output voltage trim
• Remote On/Off control
• Overvoltage protection
• Pin compatible with NFC15 and NFC20 series
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.
SPECIFICATION
All specifications are typical at nominal input, full load at 25°C unless otherwise stated
PAGE 118
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 <20mΩautomatic recovery
Transient response 25% load step ±2.0% max. dev.,
300µs 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
NEW
Product
ELECTROMAGNETIC COMPATIBILITY SPECIFICATIONS
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 120˚C
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 @ 25°C
ENVIRONMENTAL SPECIFICATIONS
Thermal performance Operating ambient -40°C to +60°C,
temperature (See Note 9)
Non-operating -55°C to +125°C
ETS 300 019-2-3 Classes T3.1, 3.2, 3.3, 3.5
Air temperature Low: IEC 68-2-1 -40°C
High: IEC 68-2-2 +60°C
Change: IEC 68-2-14 -40°C to +60°C
Relative humidity IEC 68-2-56 10% to 100% RH
IEC 68-2-30 Condensation