DC/DC CONVERTERS 40W Wide Input DC/DC Converters 1
2 YEAR WARRANTY
BXA40 Series
Single output
•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.
All specifications are typical at nominal input, full load at 25°C unless otherwise stated
EMC CHARACTERISTICS
Conducted emissions EN55022, FCC part 15, Level B
(See Notes 4 and 13)
Radiated emissions EN55022, FCC part 15 Level A
ESD air EN61000-4-2, level 3 Perf. criteria 1
ESD contact EN61000-4-2, level 4 Perf. criteria 1
Surge EN61000-4-5, level 3 Perf. criteria 1
Fast transients EN61000-4-4, level 3 Perf. criteria 1
Radiated immunity EN61000-4-3, level 3 Perf. criteria 1
Conducted immunity EN61000-4-6, level 3 Perf. criteria 1
GENERAL SPECIFICATIONS
Efficiency See table
Isolation voltage Input/output 1500VDC
Input/case 1500VDC
Switching frequency Fixed 350kHz typ.
Approvals and EN60950, UL1950
standards (pending) CSA C22.2 No. 950
Case material Aluminum substrate
with plastic case
Material flammability UL94V-0
Weight 85g (3.0oz)
MTBF MIL-HDBK-217F 500,000 hours
Size 2.2 x 2.2 x 0.5 inches
55.9 x 55.9 x 12.7 mm
ENVIRONMENTAL SPECIFICATIONS
Thermal performance Baseplate operating -40°C to +105°C
temperature
Non-operating -55°C to +105°C
Thermal impedance No air flow, no heatsink 8.5°C/W
(See Note 6) No air flow, with heatsink 7.2°C/W
OUTPUT SPECIFICATIONS
Voltage adjustability ±10%
Line regulation Low line to high line ±0.3%
Load regulation Full load to no load ±1.0%
Ripple and noise 2.9V and 3.3V 30mV pk-pk
(20MHz bandwidth) 5V 50mV pk-pk
12V 100mV pk-pk
All models 20mV rms
Temperature coefficient ±0.02%/°C
Overvoltage protection (See Note 9) 135% Vout
Short circuit protection (See Note 10) Continuous
Transient response 25% to 100% load 4.0%
(See Note 11)
Voltage accuracy ±1.0% ≤5V, ±2.0% ≥12V
Remote sense Compensated line drops
(See Note 8) up to 0.5V on 5V models
Compensated line drop up to
300mV on 2.9V and 3.3V models
INPUT SPECIFICATIONS
Input voltage range 24Vin nominal 18 to 36VDC
48Vin nominal 36 to 75VDC
Reverse voltage (See Note 5)
protection
Max. input rise and 48V 5V/ms
fall time ETS300-132
Start-up time 30ms typ.
Remote ON/OFF
Logic compatibility CMOS/TTL
ON Open-circuit
OFF <1VDC
SPECIFICATIONS
File Name: BXA40S.PDF Rev: 02 Oct 2002
For the most current data and application support visit www.artesyn.com/powergroup/products.htm
Notes
1Nominal line, at no load.
2Low line to high line at full load.
3Full load to no-load at nominal line.
4For conducted noise operation of the BXA40 to VDE0871, VDE0878 and
EN55022 level B, see BXA40 Design Note 101.
5Reverse voltage protection can be implemented by putting a slow blow
fuse on the positive input rail. Rate the fuse at 200VDC,1.5A for 48VDC
inputs and 100V, 4.5A for 24VDC input units.
6The maximum operating ambient temperature, without derating depends
on internal power dissipation and hence efficiency and cooling method.
Download BXA40 Design Note 101 which provides detailed thermal
calculations and design-in hints from the Artesyn website.
7Do not exceed a dv/dt rate of 100V per second at the trim pin input if
output current is less than 0.4% lo max.
8Remote sense is offered as standard on the 2.9V and 3.3V products. The
BXA40-24S05 and BXA40-48S05 come with remote sense as an option.
Remote sense design is designated by the suffix ‘-S’ e.g. BXA40-48S05-
SM (for units with metric inserts), BXA40-48S05-S (for units with imperial
inserts). For models without remote sense option, pin 5 and pin 6 are
absent.
9Overvoltage protection is 118% on 3.3V output model.
10 For 2.9V output, no short circuit protection above 90°C baseplate temp.
11 Transient response, 25% to 100% load, 10% for 2.9V and 3.3V models.
12 Units with the suffix ‘-M’ at the end of the model number are offered as
standard with metric threaded inserts (M3). To order units with imperial
threaded inserts (4-40 UNC) please remove the suffix ‘-M’ from the model
number. These inserts are used for bolting the unit to a PCB and/or fixing
heatsinks.
13 An external filter capacitor is necessary for safe operation of the 24V input
models. It is also suggested that an external filter capacitor be used on the
48V input models. A 4µF (or greater) film capacitor such as: ITW Paktron
Capstick series, part number 405K100CS4 4µF/100V is recommended, if
filtering is not used. See BXA40 Design Note 101.
14 A top mounted heatsink kit is available for the BXA40. The heatsink may be
oriented parallel to or perpendicular to the direction of the pins, thus
providing optimum flexibility for cooling requirements. The order number for
the top mounted heatsink kit with metric screws is ‘NFC40-HTSK-T’. The
order number for the top mounted heatsink kit with imperial screws is
‘NFC40-HTSK-I’. See Design Note 101 for ambient temperature derating
calculations.
BXA40 Series
Single output
DC/DC CONVERTERS 40W Wide Input DC/DC Converters 2
Please consult our website for the following items: ✔ Design Note www.artesyn.com
File Name: BXA40S.PDF Rev: 02 Oct 2002
INPUT OUTPUT OUTPUT INPUT TYPICAL REGULATION MODEL
VOLTAGE VOLTAGE CURRENT (MAX.) CURRENT (1) EFFICIENCY LINE (2) LOAD (3) NUMBER (12)
18-36VDC 3.3V 7A 70mA 75% 0.3% 1.0% BXA40-24S3V3-SM (8)
18-36VDC 5V 8A 40mA 81% 0.3% 1.0% BXA40-24S05-M (8)
36-75VDC 2.9V 6.9A 40mA 77% 0.3% 1.0% BXA40-48S2V9-SM (8)
36-75VDC 5V 8.0A 30mA 82% 0.3% 1.0% BXA40-48S05-M (8)
36-75VDC 12V 3.3A 30mA 87% 0.3% 1.0% BXA40-48S12-M
PIN CONNECTIONS
PIN NUMBER SINGLE OUTPUT
1 + Input
2 – Input
3 Control
4 No Connection
5 - Sense (8)
6 + Sense (8)
7 + Output
8 Common
9Trim
10KΩ
TRIMPOT
TRIM
DOWN
TRIM
UP
7
9
8
7
9
8
RT1
OR
RT2
EXTERNAL OUTPUT TRIMMING
Output can be externally trimmed
by ±10% using either method shown below.
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
BXA40 Series
Single output
DC/DC CONVERTERS 40W Wide Input DC/DC Converters 3
Please consult our website for the following items: ✔ Design Note www.artesyn.com
File Name: BXA40S.PDF Rev: 02 Oct 2002
International Safety Standard Approvals
VDE0805/EN60950/IEC950 File No. 14501-3336-7009
Licence No. 6296
UL1950 File No. E174104
CSA C22.2 No. 950 File No. LR41062C
BOTTOM VIEW
ALL DIMENSIONS IN INCHES (mm)
0.3
(7.62)
0.019
(0.50)
0.50
(12.70) 0.15
(3.90)
321
98 76 5 4
2.20 ±0.02
(
5
5
.
9
0 ±0.50
)
1.90
(
4
8
.
2
6
)
1.80
(
4
5
.
7
2
)
0.15
(
3
.
8
2
)
0.05
(
1
.
2
7
)
0.2
(5.08)
0.1
(2.54)
0.6
(15.24)
0.8
(20.32) 0.5
(12.70)
0.2
(5.08)
0.60
(15.24)
1.25
(31.76)
1.90
(48.26)
0.15
(3.82)
0.256 (6.50) Diameter
Stand-off (4 Places)
Metric (Suffix '-M'):
M3 Tap Thru. 4 places or
Imperial (No '-M' suffix) 4-
40 UNC (Optional)
0.043 ±0.003(1.02 ±0.05)
Diameter Typ.
TOLERANCE : ± 0.004 (0.1)
(Unless otherwise specified)
2.20 ±0.02
(
5
5
.
9
0 ±0.50
)
