DC/DC CONVERTERS 33-50W Wide Input DC/DC Converters 1
2 YEAR WARRANTY
BXB50 Series
Single output
• 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.
All specifications are typical at nominal input, full load at 25°C unless otherwise stated
INPUT SPECIFICATIONS CONTINUED
Undervoltage lockout 24Vin: power up 17V
24Vin: power down 16V
48Vin: power up 34V
48Vin: power down 32.5V
Start-up time Power up 20ms
(See Note 8) Remote ON/OFF 20ms
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 1500VDC
Input/output 1500VDC
Output/case 1500VDC
Switching frequency Fixed 500kHz 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 110g (3.88oz)
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 5Hz to 500Hz 2.4G rms (approx.)
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 3.3V and 5V 75mV pk-pk,
(5Hz to 20MHz) 20mV rms
(See Note 1) 12V and 15V 100mV pk-pk,
30mV rms
Temperature coefficient ±0.01%/°C
Transient response ±2.0% max. deviation
(See Note 2) 170µs recovery
to within ±1.0%
Remote sense 0.5VDC transmission
line drop compensation
INPUT SPECIFICATIONS
Input voltage range 24Vin nominal 18 to 36VDC
48Vin nominal 36 to 75VDC
Input current No load 100mA max.
Remote OFF 20mA max.
Input current (max.) 48V models 3.5A max. @ Io max.
(See Note 4) and Vin = 0 to 75V
Input reflected ripple (See Note 6) 5mA pk-pk
Active low remote ON/OFF (See Note 7)
Logic compatibility Open collector ref to -input
ON 1.2VDC max.
OFF Open circuit
SPECIFICATIONS
File Name: BXB50S.PDF Rev: 02 Oct 2002
