DC/DC CONVERTERS 90-165W Wide Input DC/DC Converters
1
2 YEAR WARRANTY
BXF250 Series
S i n g l e o u t pu t
Board mounted full brick with industry standard footprint
Adjustable output voltage with output currents of 50A
No minimum load required
2:1 input range for battery powered applications
Synchronizable and parallelable with load sharing
Overtemperature and short circuit protection
Current monitor and power good signal
Remote ON/OFF
ISO9001 certified manufacturing facilities
BXF250 Series high power density DC/DC converters can provide up to 50A output
current and have an industry-standard footprint, measuring just 2.40 x 4.60 x 0.52 inches.
The converters are equally suitable for new designs or as replacement power sources in
existing equipment. BXF250 Series converters are designed specifically for redundant
and distributed power systems in the computer and telecommunications sectors, but
their feature-rich specifications make them suitable for a very wide range of applications.
Using Bellcore 332, the MTBF is over 1,000,000 hours. Aluminium baseplate technology
and four threaded M3 inserts make heatsink attachment and thermal management easy.
The BXF250 Series is approved by UL, CSA and VDE.
All specifications are typical at nominal input, full load at 25°C unless otherwise stated
EMC CHARACTERISTICS
Conducted emissions
(See Note 8)
Bellcore 332
FCC part 15
EN55022, CISPR22
Level A
Level A
Level A
GENERAL SPECIFICATIONS
Efficiency
See table
Isolation voltage
Input/case
Input/output
Output/case
1500VDC
1500VDC
1500VDC
Switching frequency
Fixed
550kHz typ.
Approvals and
standards (See Note 4)
VDE0805, EN60950, IEC950
UL1950, CSA C22.2 No. 950
Case material
Aluminium baseplate
and plastic casing
Material flammability
UL94V-0
Weight
200g (7.06oz)
MTBF
Bellcore 332
MIL-HDBK-217F
@ 40°C, 100% FL
>1,000,000 hours
>200,000 hours
ENVIRONMENTAL SPECIFICATIONS
Thermal performance
Operating case temp. -40°C to +100°C
Non-operating
-55°C to +125°C
Altitude
Operating
Non-operating
10,000 feet max.
40,000 feet max.
Vibration
5Hz to 500Hz
2.4G rms (approx.)
OUTPUT SPECIFICATIONS
Voltage adjustability
Model specific
Set point accuracy
±0.5% typ., ±1.6% max.
Line regulation
Low line to high line
±0.1% typ.
Load regulation
Full load to min. load
±0.15% typ.
Minimum load
0A
Overshoot
0V
Undershoot
At turn-on and turn-off
0V
Ripple and noise
5Hz to 20MHz (See Note 1)
20mV rms
Temperature coefficient
±0.01%/°C
Transient response
Recovery time (See Note 2)
Peak deviation
500μs
2.0%
Remote sense
0.5VDC transmission
line drop compensation
INPUT SPECIFICATIONS
Input voltage range
48VDC nominal
36 to 75VDC
Input current
No load
Remote OFF
65mA max.
15mA max.
Input current (max.)
(See Note 3)
See table
Input reflected ripple
(See Note 5)
14mA pk-pk
Active low remote ON/OFF
Logic compatibility
ON
OFF
(See Note 7)
1.2VDC max.
Open circuit
Undervoltage lockout
48Vin: power up
48Vin: power down
35V typ.
33V typ.
Start-up time
(See Note 6)
Power up
Remote ON/OFF
2.5ms typ.
1ms typ.
SPECIFICATIONS
File Name: BXF250.PDF Rev: 18 Oct 2000