EXB250 SERIES
Single output
• High efficiency topology, 90% typical at 3.3V
• Industry standard footprint
• Wide baseplate temperature, -40˚C to +100˚C
(natural convection)
• 90% to 110% output trim
• No minimum load
• Overvoltage protection
• Remote on/off
NEW
Product
[ 2 YEAR WARRANTY ]
TÜV
SPECIFICATION
OUTPUT SPECIFICATIONS
Voltage adjustability
Set point accuracy
Line regulation
Low line to high line
Load regulation
Minimum load
Overshoot
Undershoot
Ripple and noise
Transient response
(See Note 1)
INPUT SPECIFICATIONS
Input voltage range
Input current
Input current (max.)
(See Note 3)
Input reflected ripple
(See Note 5)
48Vin nominal
No load
Remote OFF
At turn-on and turn-off
1.2V, 1.5V, 1.8V. 2.5V
and 3.3V models
5Hz to 20MHz
1V2 Model
All other models
Full load to min. load
The EXB250 is a new high efficiency, open frame, isolated 165 Watt converter
series in an industry standard half-brick footprint. The EXB250 delivers very high
output current at low voltages, and excellent useable power density for today's
high end applications. The design takes advantage of open frame construction to
provide a low weight, low thermal impedance baseplate design. The seven
models in the series feature an input voltage range of 33 to 75VDC and are
available in output voltages of 12V, 5V, 3.3V, 2.5V, 1.8V, 1.5V and 1.2V. The output
voltage on each model is adjustable from 90% to 110% of the nominal value.
Typical efficiencies for the models are 90% for the 3.3V, 88% for the 2.5V and 87%
for the 1.8V version. The EXB250 series also has a remote on/off capability.
Overcurrent and overvoltage protection features are included as standard. With full
international safety approval including EN60950 (TÜV Rheinland) and UL/cUL1950,
the EXB250 reduces compliance costs and time to market.
All specifications are typical at nominal input, full load at 25°C unless otherwise stated
EMC CHARACTERISTICS
90% to 110%
±1.6% max.
±0.2% max.
±0.1% max.
±0.2% max.
0%
None
None
60mV pk-pk
20mV rms
6% max. deviation
150µs recovery to
within total error band
Conducted emissions
Immunity:
ESD air
ESD contact
Radiated field enclosure
Conducted (DC power)
Conducted (signal)
Input transients
EN55022 (See Note 2)
EN55022 (See Note 2)
Level A
Level B
EN61000-4-2 8kV (NP), 15kV (NP)
EN61000-4-2 6kV ((NP), 8kV (NP)
EN61000-4-3 10V/m (NP)
EN61000-4-6 10V (NP)
EN61000-4-6 10V (NP)
ETS 300 132-2, ETR 283
GENERAL SPECIFICATIONS
Efficiency
Operational
Switching frequency
Approvals and
standards (See Note 4)
Material flammability
Input/output
Input/baseplate
Fixed
See table
1500VDC
1500VDC
400kHz typ.
EN60950 (TÜV Rheinland)
UL/cUL1950
UL94V-0
73g (2.6oz)
MIL-HDBK-217F
@ 40°C, 100% load
ground benign
>224,000 hours
33 to 75VDC
145mA max.
35mA max.
5.7A max. @ Io max.
and Vin = 33 to 75V
350mA (pk-pk) typ.
Weight
MTBF
ENVIRONMENTAL SPECIFICATIONS
Thermal performance
Operating baseplate -40°C to +100°C
temperature
Non-operating
-40°C to +125°C
Active high remote ON/OFF
Logic compatibility
ON
OFF
Undervoltage lockout
Start-up time
(See Note 6)
(See Note 7)
Open collector ref to -input
Open circuit or >4.0VDC
<1.2VDC
32.5V (typ.)
30.5V (typ.)
10ms (typ.)
3ms (typ.)
International Safety Standard Approvals
UL/cUL : UL1950 File No. E135734
Power up
Power down
Power up
Remote ON/OFF
TÜV
TÜV Rheinland Certificate No. R2174184
CB Scheme No. US-TUVR-1085
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