The BXB50 Series are high power density dc-dc converters
packaged in the industry standard footprint (2.40 x 2.28 x 0.50
inches) to give designers optimum choices when specifying for
both new and replacement designs. Suitable for a wide range of
applications in nearly any industry, the BXB50 was particularly
designed with communication and distributed power applications
in mind. Using Bellcore 332, the MTBF is greater than 1,400,000
hours. Aluminum baseplate technology with four threaded M3
inserts makes heatsink attachment and optimum thermal
management easy. The BXB50 series are approved to IEC950 by
UL, CSA and VDE.
Embedded Power for
Business-Critical Continuity
BXB50 Series
Single output
Special Features
• Industry standard footprint
MTBF >1.4 million hours
(Bellcore 332)
• Input voltage to ETS300-132-2
• Adjustable output voltage
• No minimum load required
• Separate case ground pin
• 2:1 input range for battery
powered applications
• Undervoltage lockout (UVLO)
• UL, VDE and CSA
safety approvals
• Available RoHS compliant
• 2 year warranty
Total Power: 33 - 50W
Input Voltage: 18 - 36VDC
36 - 75VDC
# of Outputs: Single
Safety
VDE0805/EN60950/IEC950
File No. 10401-3336-0205
Licence No. 40012035
UL60950 File No. E136005
CSA C22.2 No. 950
File No. LR41062C
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Embedded Power for
Business-Critical Continuity
All specifications are typical at nominal input, full load at 25°C unless otherwise stated.
Specifications
OUTPUT SPECIFICATIONS
Voltage adjustability 60% to 110%
Set point accuracy ±1.0%
Line regulation Low line to high line ±0.05%
Load regulation Full load to min. load ±0.10%
Minimum load 0%
Overshoot At turn-on and turn-off None
Undershoot None
Ripple and noise 3.3 V and 5 V 75 mV pk-pk,
(5 Hz to 20 MHz) 20 mV rms
(See Note 1) 12 V and 15 V 100 mV pk-pk,
30 mV rms
Temperature coefficient ±0.01%/°C
Transient response ±2.0% max. deviation
(See Note 2) 170 μs recovery
to within ±1.0%
Remote sense 0.5 Vdc transmission
line drop compensation
INPUT SPECIFICATIONS
Input voltage range 24Vin nominal 18-36 Vdc
48Vin nominal 36-75 Vdc
Input current No load 100 mA max.
Remote OFF 20 mA max.
Input current (max.) 48 V models 3.5 A max. @ Io max.
(See Note 4) and Vin = 0 to 75 V
Input reflected ripple (See Note 6) 5 mA pk-pk
Active low remote ON/OFF (See Note 7)
Logic compatibility Open collector ref to -input
ON 1.2 Vdc max.
OFF Open circuit
INPUT SPECIFICATIONS CONTINUED
Undervoltage lockout 24 Vin: power up 17 V
24 Vin: power down 16 V
48 Vin: power up 34 V
48 Vin: power down 32.5 V
Start-up time Power up 20 ms
(See Note 8) Remote ON/OFF 20 ms
EMC CHARACTERISTICS
Conducted emissions Bellcore 1089 Level A
(See Note 3) FCC part 15 Level A
EN55022, CISPR22 Level A
GENERAL SPECIFICATIONS
Efficiency See table
Isolation voltage Input/case 1500 Vdc
Input/output 1500 Vdc
Output/case 1500 Vdc
Switching frequency Fixed 500 kHz typ.
Approvals and VDE0805, EN60950, IEC950
standards (See Note 5) UL1950, CSA C22.2 No. 950
Case material Aluminum baseplate with plastic case
Material flammability UL94V-0
Weight 110 g (3.88 oz)
MTBF Bellcore 332 1,400,000 hours
MIL-HDBK-217F 580,000 hours
@ 40 °C, 100% load min.
ENVIRONMENTAL SPECIFICATIONS
Thermal performance Operating case temp. -40 °C to +100 °C
Non-operating -55 °C to +125 °C
Altitude Operating 10,000 feet max.
Non-operating 40,000 feet max.
Vibration 5-500 Hz 2.4 G rms (approx.)
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Embedded Power for
Business-Critical Continuity
Specifications Contd.
Notes
1 Measured with 10 μF tantalum capacitor and 1 μF ceramic capacitor across
output.
2 di/dt = 0.1 A/1 μs, Vin = 48 Vdc, Tc = 25 °C, load change = 0.5 lo max. to 0.75 lo
max. and 0.75 lo max. to 0.5 lo max.
3 Units should be characterised within systems. External components required.
4 Input fusing is recommended based on surge current and maximum input
current.
5 This product is only for inclusion by professional installers within other
equipment and must not be operated as a stand alone product.
6 Simulated source impedance of 12
μH. 12 μH inductor in series with +Vin.
7 Active high remote on/off option is available (standard product is active low),
designate with the suffix ‘FHT’ e.g. BXB50-48S05FHTJ. Consult factory for
further details and options.
8 Start-up into resistive load.
9 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 special
request, please contact your local sales representative for details.
10 NOTICE: Some models do not support all options. Please contact your local
Artesyn representative or use the on-line model number search tool at
http://www.artesyn.com/powergroup/products.htm to find a suitable
alternative
PROTECTION
Short circuit Continuous, automatic recovery
Overvoltage Non-latching
Undervoltage Non-latching
Thermal 110 °C baseplate,
automatic recovery
TELECOM SPECIFICATION
Central office interface A ETS300-132-2
OUTPUT
INPUT
OVP
OUTPUT
OUTPUT OUTPUT
EFFICIENCY
REGULATION
MODEL
POWER
VOLTAGE VOLTAGE
CURRENT CURRENT
(TYP.)
LINE LOAD
NUMBER
(7,9,10)
(MAX.) (MIN.) (MAX.)
33 W 18-36 Vdc 4.3 Vdc 3.3 V 0 A 10 A 76% ±0.05% ±0.10% BXB50-24S3V3FLTJ
50 W 18-36 Vdc 14.5 Vdc 12 V 0 A 4.16 A 83% ±0.05% ±0.10% BXB50-24S12FLTJ
50 W 18-36 Vdc 17.5 Vdc 15 V 0 A 3.33 A 83% ±0.05% ±0.10% BXB50-24S15FLTJ
33 W 36-75 Vdc 4.3 Vdc 3.3 V 0 A 10 A 77% ±0.05% ±0.10% BXB50-48S3V3FLTJ
50 W 36-75 Vdc 6.5 Vdc 5 V 0 A 10 A 82% ±0.05% ±0.10% BXB50-48S05FLTJ
50 W 36-75 Vdc 14.5 Vdc 12 V 0 A 4.16 A 84% ±0.05% ±0.10% BXB50-48S12FLTJ
EXTERNAL OUTPUT TRIMMING
Output can be externally
trimmed by using the
method shown.
TRIM
UP
TRIM
DOWN
8
7
6
RT1
OR
RT2
Embedded Power for
Business-Critical Continuity
Rev.03.08.07
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service marks of Emerson Electric Co.
©2007 Emerson Electric Co.
Emerson Network Power.
The global leader in enabling
business-critical continuity.
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PIN CONNECTIONS
PIN
NUMBER
FUNCTION
1+ Vin
2 Remote ON/OFF
3Case
4- Vin
5 - Vout
6 - Sense
7Trim
8 + Sense
9 + Vout
0.500 (12.69) ± 0.010 (0.25)
1.000 (25.40)
1.400 (35.56)
7 x Ø.040 (1.02) ±0.002 (0.05)
0.190 (4.83) ±0.010 (0.25)
0.400 (10.16)
VIEW SHOWN
PIN SIDE UP
1.90
(48.26)
VI(+) ON/OFF CASE VI (-)
2.28 (57.91) Max.
ALL DIMENSIONS IN INCHES (mm)
Tolerance : x.xx ±0.02in. (0.51mm)
x.xxx ±0.010in. (0.254mm)
Vo(+) +SEN TRIM -SEN Vo (-)
0.190 (4.83) ± 0.010 (0.25)
0.700 (17.77)
0.400 (10.16)
1.000 (25.40)
2 x Ø.080 (2.03) ± 0.002 (0.05)
4 x M3 x 0.5 Through
2.000 (50.80)
1.400 (35.56)
0.200 (5.08) Min.
Length for all Input
and Output Pins
2.40 (60.96)
Max.
0.500 (12.70)
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