EXB250 48V SERIES
Single Output
Embedded Power for
Business-Critical Continuity
EXB250 48V
SERIES
Total Power:
Input Voltage:
# of Outputs:
165 W
33 - 75 VDC
Single
Rev.10.11.07
exb250 48v series
1 of 36
Special Features
• High efficiency topology, 90%
typical at 3.3V
• High output current, high use-
able power density
• Industry standard footprint
• Wide operating temperature, -
40˚C to +100˚C (baseplate
temperature)
• 90% to 110% output trim
• No minimum load
• Overvoltage protection
• Remote on/off
• Approvals to EN60950 (TÜV
Rheinland) and UL/cUL1950
• Complies with ETS 300 019-1-
3/2-3
• Complies with ETS 300 132-2
(input voltage and current
requirements)
• Complies with ETS 300 386-1
• Available RoHS compliant
• 2 year warranty
NOTICE SOME MODELS LISTED IN THIS
DOCUMENT HAVE BEEN DISCONTINUED
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.
The EXB250 is a new high efficiency, open-frame, isolated
165 Watt converter series. 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 simplicity of the baseplate
design enables customers to easily manage cooling of the product,
eliminating the guesswork associated with competing products.
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.
Technical Reference Note -
EXB250 48V SERIES
Single Output
Rev.10.11.07
exb250 48v series
2 of 36
Stresses in excess of the maximum ratings can cause permanent damage to the device. Operation of the device is not implied at these or any other
conditions in excess of those given in the specification. Exposure to absolute maximum ratings can adversely affect device
reliability.
Absolute Maximum Ratings
Characteristic
Input voltage - continuous
Input voltage - peak/surge
Symbol
Vin (cont)
Vin (peak)
Min
-0.3
-0.3
Typ
Max
75
100
Units
V DC
V DC
Notes and Conditions
Vin(+) - Vin(-)
Peaks of any duration,
converter OFF above 80V, non-
latching, unit ON once Vin <75V
Peaks of any duration
Measured at baseplate
Input voltage - remote pin
Operating temperature
Storage temperature
Output power (1.2V)
Output power (1.5V)
Output power (1.8V)
Output power (2.5V)
Output power (3.3V)
Output power (5V)
Output power (12V)
Vrem (peak)
Top
Tstorage
Pout (max)
Pout (max)
Pout (max)
Pout (max)
Pout (max)
Pout (max)
Pout (max)
-0.3
-40
-40
75
100
125
72
90
108
150
165
165
165
V DC
˚C
˚C
W
W
W
W
W
W
W
All specifications are typical at nominal input Vin = 48V, full load at 25˚C unless otherwise specified.
Input Characteristics
Characteristic
Input voltage - operating
Input current - no load (1.2V)
Input current - no load (1.5V)
Input current - no load (1.8V)
Input current - no load (2.5V)
Input current - no load (3.3V)
Input current - no load (5V)
Input current - no load (12V)
Input current - Quiescent
Input voltage variation
Inrush current (i
2
t)
Symbol
Vin (oper)
lin
lin
lin
lin
lin
lin
lin
lin (off)
dv/dt
linrush
0.03
Min
33
Typ
48
67
80
110
95
114
110
112
26
Max
75
85
100
135
115
145
145
145
35
5
Units
V DC
mADC
mADC
mADC
mADC
mADC
mADC
mADC
mADC
V/ms
A
2
s
Vin (min) - Vin (max), enabled
Vin (min) - Vin (max), enabled
Vin (min) - Vin (max), enabled
Vin (min) - Vin (max), enabled
Vin (min) - Vin (max), enabled
Vin (min) - Vin (max), enabled
Vin (min) - Vin (max), enabled
Converter disabled
Complies with ETS300 132 Part 4.4
Complies with ETS300 132 Part 4.7,
with recommended LISN and
recommended external bypass
Complies with ETS300 132 Part 4.7,
with recommended LISN and
recommended external bypass
capacitor
dB
10
A
Frequency <1 kHz
Slow Blow/Antisurge HRC
recommended 200V Rating.
See Application Note 119
Notes and Conditions
capacitor
Inrush current ratio
It/Im
6.8
Input ripple rejection
Input fuse
50
Technical Reference Note -
EXB250 48V SERIES
Single Output
Rev.10.11.07
exb250 48v series
3 of 36
Turn On/Off
Characteristic
Input voltage - turn on
Input voltage - turn off
Hysteresis
Turn on delay - enabled,
then power applied
Tdelay
(power)
Symbol
Vin (on)
Vin (off)
Min
30
29
Typ
32.5
30.5
3
10
14
Max
34.0
33.0
Units
V DC
V DC
V DC
msec
With the Remote On/Off signal
asserted, time from when Vin >
Vin (oper) until Vout is within
total regulation band
With Vin = Vin (nom), then
Remote On/Off asserted,
time until Vo is within total error
band
Rise time
Trise
1.0
2.0
msec
From 10% to 90%, full resistive
load, no external capacitance
Notes and Conditions
Turn on delay - power
applied, then enabled
Tdelay
(enable)
3
5
msec
Technical Reference Note -
EXB250 48V SERIES
Single Output
Rev.10.11.07
exb250 48v series
4 of 36
Signal Electrical Interface
Characteristic - Signal Name
At Remote ON/OFF pin
Open collector or equivalent
compatible
Control pin open circuit voltage
High level input voltage
Vih
Vih
4
4
4.5
5
V
V
Symbol
Min
Typ
Max
Units
Notes and Conditions
See Notes 1 and 2
Iih = 0μA; open circuit voltage
Converter guaranteed ON
when control pin is
greater than Vih (min)
Current flowing into control pin
when pin is pulled high
(max. at Vih = 75V)
Acceptable leakage current from
signal pin into the open collector
driver (neg = from converter)
Converter guaranteed off
when control pin is
less than Vil (max)
Vil = 0.4 V
ViI = 0.0 V, maximum source
current from converter with
short circuit
High level input current
Iih
10
μA
Acceptable high level
leakage current
Low level input voltage
Iih (leakage)
-10
μA
ViI
-0.3
1.2
V
Low level input current
Low level input current
IiI
Iil (max)
-0.2
-0.2
-0.4
-0.4
mA
mA
Common Protection/Control
Characteristic
Overtemperature shutdown
threshold
Overtemperature shutdown
- restart hysteresis
Remote sense compensation
Symbol
Tots
Min
110
Typ
115
Max
120
Units
˚C
Notes and Conditions
Baseplate temperature,
non-latching shutdown
protection
4
10
˚C
%
% of Vo (nom), compensation
includes trim. See Application
Note
Reliability and Service Life
Characteristic
Mean time between failure
Symbol
MTBF
Min
1,598,243
Typ
Max
Units
Hours
Notes and Conditions
Telcordia SR-332,
Vin = Vin (nom); Iout = Iout
(max); ambient 40˚C;
ground benign environment
Demonstrated
Completed
Completed
Mean time between failure
HALT testing
Asynchronous dynamic testing
MTBF
>2,000,000
Hours
Isolation
Characteristic
Input to output test voltage
Input to output capacitance
Input to output resistance
Input to output insulation system
100
Operational
2000
Symbol
Min
Typ
Max
1500
Units
V DC
pF
MΩ
Measured with 500 V DC
Notes and Conditions
Test duration 1s
Technical Reference Note -
EXB250 48V SERIES
Single Output
Rev.10.11.07
exb250 48v series
5 of 36
Other Specifications
Characteristic
Switching frequency
Weight
Symbol
fsw
Min
340
Typ
400
73
Max
460
Units
kHz
g
Notes and Conditions
Fixed frequency (all models)
Statistical weight data available
Environmental Requirements
Characteristic
Thermal performance
Altitude
Symbol
Min
-40
Typ
Max
100
3000
9843
10000
32808
Type
Air temperature
Parameter
Low
High
Change
Reference
IEC 68-2-1
IEC 68-2-2
IEC 68-2-14
Test Level
-40˚C
+65˚C
-40˚C to +65˚C
Units
˚C
m
ft
m
ft
Notes and Conditions
Baseplate temperature
Derate total max. output
current by 20%
Derate total max. output
current by 20%
Derate total max. output
current by 50%
Derate total max. output
current by 50%
Notes and Conditions
All characteristics and parameters
extracted from ETS 300 019
classes 3.1, 3.2, 3.3, 3.4 and 3.5
Tmax. = +65˚C for T3.4
Relative humidity
Low
High
Condensation
Vibration IEC class 3M5
Freq. velocity
Freq. acceleration
Acceleration
IEC 68-2-56
IEC 68-2-30
IEC 68-2-6
IEC 68-2-6
IEC 68-2-29
10%
100%
90 to 100%
5-9Hz 5mm/s
9-200Hz 1g
10g
Shocks IEC class 3M5
Referenced ETSI standards:
ETS 300 019: Environmental conditions and environmental tests for telecommunications equipment
ETS 300 019: Part 1-3 (1997) Classification of environmental conditions stationary use at weather protected locations
ETS 300 019: Part 2-3 (1997) Specification of environmental tests stationary use at weather protected locations
EMC Electromagnetic
Compatibility
Phenomenon
Immunity:
ESD
Enclosure
EN61000-4-2
6kV contact
8kV air
EFT
DC power
Signal
Radiated field
Conducted
Enclosure
DC power
Signal
DC power
EN61000-4-4
EN61000-4-4
EN61000-4-3
EN61000-4-6
EN61000-4-6
ETS 300 132
ETR 283
2kV
4kV
1kV
2kV
10V/m
10V
10V
NP
RP
NP
LFS
NP
LFS
NP
NP
NP
As per ETS 300 386-1 table 5
See Application Note 119
See Application Note 119
As per ETS 300 386-1 table 5
As per ETS 300 386-1 table 5
See Application Note 119
As per ETS 300 386-1 table 5
Port
Standard
Test level
Criteria
Notes and conditions
Input transients
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