BXB50 Series
S i n g l e o u t p u t
DC/DC CONVERTERS 33-50W Wide Input DC/DC Converters
1
• 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
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.
2 YEAR WARRANTY
All specifications are typical at nominal input, full load at 25°C unless otherwise stated
SPECIFICATIONS
OUTPUT SPECIFICATIONS
Voltage adjustability
INPUT SPECIFICATIONS CONTINUED
60% to 110%
±1.0%
±0.05%
±0.10%
0%
Undervoltage lockout
24Vin: power up
17V
16V
24Vin: power down
48Vin: power up
Set point accuracy
34V
48Vin: power down
32.5V
Line regulation
Load regulation
Minimum load
Overshoot
Low line to high line
Start-up time
(See Note 8)
Power up
Remote ON/OFF
20ms
20ms
Full load to min. load
EMC CHARACTERISTICS
At turn-on and turn-off
None
Conducted emissions
(See Note 3)
Bellcore 1089
Level A
Level A
Level A
FCC part 15
Undershoot
None
EN55022, CISPR22
Ripple and noise
(5Hz to 20MHz)
(See Note 1)
3.3V and 5V
12V and 15V
75mV pk-pk,
20mV rms
100mV pk-pk,
30mV rms
GENERAL SPECIFICATIONS
Efficiency
See table
Isolation voltage
Input/case
Input/output
Output/case
1500VDC
1500VDC
1500VDC
Temperature coefficient
±0.01% /°C
Transient response
(See Note 2)
±2.0% max. deviation
170µs recovery
Switching frequency
Fixed
500kHz typ.
to within ±1.0%
Approvals and
VDE0805, EN60950, IEC950
standards (See Note 5)
UL1950, CSA C22.2 No. 950
Aluminum baseplate with plastic case
UL94V-0
Remote sense
0.5VDC transmission
line drop compensation
Case material
Material flammability
Weight
INPUT SPECIFICATIONS
Input voltage range
24Vin nominal
48Vin nominal
18 to 36VDC
36 to 75VDC
110g (3.88oz)
MTBF
Bellcore 332
1,400,000 hours
Input current
No load
100mA max.
20mA max.
MIL-HDBK-217F
@ 40°C, 100% load
580,000 hours
min.
Remote OFF
Input current (max.)
(See Note 4)
48V models
3.5A max. @ Io max.
and Vin = 0 to 75V
ENVIRONMENTAL SPECIFICATIONS
Thermal performance
Operating case temp. -40°C to +100°C
Input reflected ripple
(See Note 6)
5mA pk-pk
Non-operating
-55°C to +125°C
Active low remote ON/OFF
Logic compatibility
ON
(See Note 7)
Open collector ref to -input
1.2VDC max.
Altitude
Operating
Non-operating
10,000 feet max.
40,000 feet max.
OFF
Open circuit
Vibration
5Hz to 500Hz
2.4G rms (approx.)
File Name: BXB50S.PDF Rev: 02 Oct 2002