DC/DC CONVERTERS 40W Wide Input DC/DC Converters
1
2 YEAR WARRANTY
BXA40 Series
S i n g l e o u t p u t
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 25C 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
-40C to +105C
temperature
Non-operating
-55C to +105C
Thermal impedance
No air flow, no heatsink
8.5C/W
(See Note 6)
No air flow, with heatsink
7.2C/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
1
Nominal line, at no load.
2
Low line to high line at full load.
3
Full load to no-load at nominal line.
4
For conducted noise operation of the BXA40 to VDE0871, VDE0878 and
EN55022 level B, see BXA40 Design Note 101.
5
Reverse 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.
6
The 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.
7
Do 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.
8
Remote 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.
9
Overvoltage 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 4F (or greater) film capacitor such as: ITW Paktron
Capstick series, part number 405K100CS4 4F/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
S i n g l e o u t p u t
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
9
Trim
10K
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
S i n g l e o u t p u t
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)
3
2
1
9
8
7
6
5
4
2.20
0.02
(55.90
0.50)
1.90
(48.26)
1.80
(45.72)
0.15
(3.82)
0.05
(1.27)
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
(55.90
0.50)
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