BXA40 Series
S i n g l e o u t p u t
DC/DC CONVERTERS 40W Wide Input DC/DC Converters
1
• Pin-compatible with NFC40 Series
• Meets telecom power supply interface standard
ETS300-132-2
• EN60950, CSA C22.2 No. 950 and UL1950 safety approvals
• EN61000-4-2, -3, -4, -5, -6 immunity compliant
• Fixed frequency operation at 350kHz typ.
• MTBF in excess of 500,000 hours
• Basic insulation system with 1500V isolation
• Remote sense on low voltage logic outputs
• Output voltage trim
The BXA40 Series providing up to 40 Watts, has been conceived as an applications specific
range of DC/DC converters, specifically addressing telecommunications, industrial electronics,
test equipment, mobile telecommunications and distributed power applications. The series offers
two wide input voltage ranges, 18-36VDC and 36-75VDC, and is available with single outputs
from 2.9V to 12V. The BXA40 series is designed to meet ETSI telecoms interface standards
ETS300-132-2. Together with internal filtering, safety approval to IEC950 and basic insulation, the
48VDC models are ideal for telecommunications applications. The 24V models are particularly
suited to industrial and test equipment applications, featuring EN61000-4-2, -3, -4, -5 and -6
immunity compliance. Other features include low output ripple, overvoltage protection, indefinite
short circuit protection, remote enable and remote sense.
2 YEAR WARRANTY
All specifications are typical at nominal input, full load at 25°C unless otherwise stated
SPECIFICATIONS
OUTPUT SPECIFICATIONS
EMC CHARACTERISTICS
Voltage adjustability
±10%
±0.3%
±1.0%
Conducted emissions
EN55022, FCC part 15,
(See Notes 4 and 13)
Level B
Line regulation
Load regulation
Low line to high line
Radiated emissions
ESD air
ESD contact
EN55022, FCC part 15
EN61000-4-2, level 3
EN61000-4-2, level 4
EN61000-4-5, level 3
EN61000-4-4, level 3
EN61000-4-3, level 3
EN61000-4-6, level 3
Level A
Perf. criteria 1
Perf. criteria 1
Perf. criteria 1
Perf. criteria 1
Perf. criteria 1
Perf. criteria 1
Full load to no load
Ripple and noise
(20MHz bandwidth)
2.9V and 3.3V
5V
12V
30mV pk-pk
50mV pk-pk
100mV pk-pk
20mV rms
Surge
Fast transients
Radiated immunity
Conducted immunity
All models
Temperature coefficient
Overvoltage protection
Short circuit protection
Transient response
±0.02% /°C
135% Vout
Continuous
4.0%
GENERAL SPECIFICATIONS
(See Note 9)
(See Note 10)
Efficiency
See table
Isolation voltage
Input/output
1500VDC
1500VDC
Input/case
25% to 100% load
(See Note 11)
Switching frequency
Fixed
350kHz typ.
Voltage accuracy
±1.0% ≤5V, ±2.0% ≥12V
Approvals and
standards (pending)
EN60950, UL1950
CSA C22.2 No. 950
Remote sense
(See Note 8)
Compensated line drops
up to 0.5V on 5V models
Compensated line drop up to
300mV on 2.9V and 3.3V models
Case material
Aluminum substrate
with plastic case
Material flammability
UL94V-0
85g (3.0oz)
INPUT SPECIFICATIONS
Weight
MTBF
Size
Input voltage range
24Vin nominal
48Vin nominal
18 to 36VDC
36 to 75VDC
MIL-HDBK-217F
500,000 hours
2.2 x 2.2 x 0.5 inches
55.9 x 55.9 x 12.7 mm
Reverse voltage
protection
(See Note 5)
ENVIRONMENTAL SPECIFICATIONS
Max. input rise and
fall time
48V
5V/ms
ETS300-132
Thermal performance
Baseplate operating
-40°C to +105°C
temperature
Non-operating
Start-up time
30ms typ.
-55°C to +105°C
8.5°C/W
Remote ON/OFF
Logic compatibility
ON
OFF
Thermal impedance
(See Note 6)
No air flow, no heatsink
No air flow, with heatsink
CMOS/TTL
Open-circuit
<1VDC
7.2°C/W
File Name: BXA40S.PDF Rev: 02 Oct 2002
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