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Embedded Power for
Business-Critical Continuity
EXB50 Series
Single output
Special Features
• High efciency topology, 91%
typical on EXB50-48S05J
• Industry standard footprint
• Wide operating temperature
-40 °C to +70 °C
(natural convection)
• 60% to 110% output trim
• No minimum load
• Overvoltage and
overtemperature protection
• Remote sense compensation
• Remote ON/OFF
• Available RoHS compliant
• 2 year warranty
Total Power: 20-50W
Input Voltage: 36-75VDC
# of Outputs: Single
Safety
UL/cUL CAN/CSA 22.2
No. 60950-00 : UL 60950
File No. E174104
TÜV Product Service.
Certicate No.
B 03 08 38572 036
Rev.02.23.10_64
EXB50 Series
1 of 4
Electrical Specications
Output
Voltage adjustability: 60% to 110%
Setpoint accuracy: ± 1.5%
Line regulation: Low line to high line 0.1% max.
Load regulation: Full load to min. load 0.2% max.
Total error band: ± 3.0%
Minimum load: 0%
Overshoot: At turn-on and turn-off None
Undershoot: None
Ripple and noise:
(see Note 1) 5 Hz to 20 MHz 100 mV pk-pk
20 mV rms
Transient response:
(See Notes 2 and 8) 48 V models 2.0% peak deviation, 200 µs recovery
to within total error band
Remote sense: (See Note 9) 10% o/p voltage change
All specications are typical at nominal input, full load at 25 °C unless otherwise stated.
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Electrical Specications cont.
Input
Input voltage range:
(See Note 14) 48 V nominal
100 V 100 ms transient
36 - 75 Vdc
Input current: 48 V no load
48 V Remote OFF
60 mA max.
10 mA max.
Input current (max)
(See Note 4) 48 V models 1.7 A max. @ Io max. and Vin = 36 - 75 Vdc
Input reected ripple:
(See Note 6) 48 V models 50 mA (pk-pk) typ.
Remote ON/Off
Logic compatibility
ON
OFF
(See Note 15)
Open collector ref to -Input
Open circuit or > 2 Vdc
< 1.2 Vdc
Undervoltage lockout: 48 V Power up
48 V Power down
33.2 V max.
30.9 V min.
Start-up time:
(see Note 7) Power up
Remote ON/OFF
30 ms
25 ms
EMC Characteristics
Conducted emissions: EN55022 (See Note 3)
EN55022 (See Note 3)
Level A
Level B
Radiated emissions: EN55022 Level A
Immunity: (See Note 13)
ESD air: EN61000-4-2 8 kV (NP), 15 kV (RP)
ESD contact: EN61000-4-2 6 kV (NP), 8 kV (RP)
Radiated eld enclosure: EN61000-4-3 10 V/m (NP)
Conducted (DC power): EN61000-4-6 10 V/m (NP)
Conducted (signal) EN61000-4-6 10 V/m (NP)
General Specications
Efciency: See table
Basic insulation: Input/output 1500 Vdc
Switching frequency: Fixed 300 kHz typ.
Approvals & Standards: (See Note 5) IEC60950/EN60950, UL/cUL1950, CSA C22.2 No. 950
Material ammability: UL94V-0
Weight: 50 g (1.77 oz)
MTBF: MIL-HDBK-217F @ 25 °C
100% load ground benign 270,000 hours
Environmental Specications
Thermal performance:
(See Notes 11, 12)
ETS 300 019-2-3
Operating ambient, temperature
(natural convection)
Non-operating
-40 °C to +70 °C
-55 °C to +125 °C
Classes T3.1 to T3.5
Altitude:
(See Note 10) 3,000 metres
10,000 metres
Derate max. output current by 20%
Derate max. output current by 50%
All specications are typical at nominal input, full load at 25 °C unless otherwise stated.
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Notes
1 Measured as per recommended set-up. 150 mV pk-pk for EXB50-48S12J.
2 di/dt = 0.1 A/µs, Vin = 48 Vdc, Tc = 25 °C, load change = 0.5 lo max. to 0.75 lo
max. and 0.75 lo max. to 0.5 lo max.
3 The EXB50 meets level A and level B conducted emissions only with external
components connected before the input pins to the converter.
4 Recommended input fusing is 3.15 A HRC 200 V rated fuse on the 48 V.
5 This product is only for inclusion by professional installers within other
equipment and must not be operated as a stand alone product.
6 Simulated source impedance of 12 µH. 12 µH inductor in series with +Vin.
7 Start-up into resistive load.
8 Maximum output deviation is 10% inclusive of trim.
9 Contact factory for operation at higher altitude.
10 See Application Note 113 for derating curves.
11 Input transient (48 V) ETS300 132-2 ETR283.
CAUTION: Hazardous internal voltages and high temperatures.
Ensure that unit is not user accessible.
12 100 V, 100 ms transient applies to the EXB50-48S3V3J models. Please add
the sufx ‘R03’ to the model number e.g. EXB50-48S3V3R03J. This is also
active low remote ON/OFF.
13 Active low remote ON/OFF available. Please add sufx ‘-R’ to model number
e.g. EXB50-48S3V3-RJ.
14 The ‘J’ sufx indicates that these parts are Pb-free (RoHS 6/6) compliant.
TSE RoHS 5/6 (non Pb-free) compliant versions may be available on special
request, please contact your local sales representative for details.
15 NOTICE: Some models do not support all options. Please contact your local
Emerson Network Power representative or use the on-line model number
search tool at http://www.PowerConversion.com to nd a suitable alternative.
Output can be externally trimmed by using the method shown below.
TRIM
UP
+ Sense
Trim
- Sense
TRIM
DOWN
RT1
or
RT2
External Output Trimming
Protection
Short-circuit Continuous
Overvoltage Non-latching clamp
Thermal 120 °C hot spot temperature with automatic recovery
Telecom Specication
Central ofce Interface A ETS300-132-2, Input voltage and current requirements
Ordering Information
Output
Power (Max.)
Input
Voltage
OVP Output
Voltage
Output Currents Efficiency
(Typ)
Regulation Model Numbers (16,17)
(Min) (Max) Line Load
18 W 36 - 75 Vdc 2.15 Vdc 1.8 V 0 A 10 A 85.7% ± 0.1% ± 0.2% EXB50-48S1V8J (15)
20 W 36 - 75 Vdc 2.45 Vdc 2 V 0 A 10 A 87.5% ± 0.1% ± 0.2% EXB50-48S2V0J (15)
25 W 36 - 75 Vdc 2.95 Vdc 2.5 V 0 A 10 A 87.5% ± 0.1% ± 0.2% EXB50-48S2V5J (15)
33 W 36 - 75 Vdc 4 Vdc 3.3 V 0 A 10 A 90.0% ± 0.1% ± 0.2% EXB50-48S3V3J (14, 15)
50 W 36 - 75 Vdc 6.15 Vdc 5 V 0 A 10 A 91.0% ± 0.1% ± 0.2% EXB50-48S05J (15)
50 W 36 - 75 Vdc 14.2 Vdc 12 V 0 A 4.2 A 90.0% ± 0.1% ± 0.2% EXB50-48S12J (15)
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Rev.02.23.10_64
EXB50 Series
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OPEN-FRAME
HEIGHT
STAND-OFFS
4 PLACES
ALL DIMENSIONS IN INCHES (mm)
General Tolerance ±0.010 (0.25)
Unless Otherwise Specified
9
5
8
7
6
4
1
3
Ø
0.040 ±0.02
(
Ø
1.02 ±0.05)
1.90
(48.26) 0.19
(4.83)
2.28 ±0.02
(57.91 ±0.5)
0.02
(0.50)
0.16±0.02
(4.10±0.5)
0.138±0.02
(3.50±0.5)
0.20
(5.08)
2.00
(50.80)
1.40
(35.56)
1.00
(25.40)
0.40
(10.16)
0.70
(17.78)
1.00
(25.40)
1.40
(35.56)
2.40 ±0.02
(60.96 ±0.5)
0.50
(12.70)
0.43±0.02
(10.90±0.5)
Ø
0.079±0.002
(
Ø
2.03±0.05)
BOTTOM
VIEW
Americas
5810 Van Allen Way
Carlsbad, CA 92008
USA
Telephone: +1 760 930 4600
Facsimile: +1 760 930 0698
Europe (UK)
Waterfront Business Park
Merry Hill, Dudley
West Midlands, DY5 1LX
United Kingdom
Telephone: +44 (0) 1384 842 211
Facsimile: +44 (0) 1384 843 355
Asia (HK)
14/F, Lu Plaza
2 Wing Yip Street
Kwun Tong, Kowloon
Hong Kong
Telephone: +852 2176 3333
Facsimile: +852 2176 3888
For global contact, visit:
www.PowerConversion.com
techsupport.embeddedpower
@emerson.com
While every precaution has been taken to ensure
accuracy and completeness in this literature, Emerson
Network Power assumes no responsibility, and disclaims
all liability for damages resulting from use of this
information or for any errors or omissions.
Emerson Network Power and the Emerson
Network Power logo are trademarks and
service marks of Emerson Electric Co.
©2010 Emerson Electric Co.
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Pin Connections
Pin Number Function
Pin 1 -Vin
Pin 2 No Pin
Pin 3 Remote ON/OFF
Pin 4 +Vin
Pin 5 +Vout
Pin 6 +Sense
Pin 7 Trim
Pin 8 -Sense
Pin 9 -Vout