DC/DC CONVERTERS 20-50W High Efficiency DC/DC Converters 1
2 YEAR WARRANTY
EXB50 Series
Single output
•High efficiency topology, 91% typical on EXB50-48S05
•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
The EXB50 series of 50 Watt single-output isolated DC/DC converters are specifically
designed to meet the power needs of low-voltage silicon. Housed in an open-frame
package with an industry-standard footprint, these latest-generation converters offer
efficiencies as high as 91%. The series comprises three 24V input models with 5V,
3.3V and 2V outputs, and six 48V input models with 12V, 5V, 3.3V 2.5V, 2.0V and 1.8V
outputs. All models feature a wide input range, trimmable output voltage and a 10A
current rating (except the 12V). Remote sense and remote ON/OFF facilities are
included as standard, and the converters are comprehensively protected against over-
current, over-voltage and over-temperature conditions.
NEW Product
All specifications are typical at nominal input, full load at 25°C unless otherwise stated SPECIFICATIONS
OUTPUT SPECIFICATIONS
Voltage adjustability 60% to 110%
Setpoint accuracy ±1.5% max.
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 5Hz to 20MHz 100mV pk-pk
(See Note 1) 20mV rms
Transient response 24V models 3.0% peak deviation
(See Notes 2 and 8) 48V models 2.0% peak deviation,
200µs recovery to
within total error band
Remote sense (See Note 9) 10% o/p voltage change
INPUT SPECIFICATIONS
Input voltage range 24V nominal 18 to 36VDC
48V nominal 36 to 75VDC
(See Note 14) 100V 100ms transient
Input current 24V no load 85mA max.
24V Remote OFF 20mA max.
48V no load 60mA max.
48V Remote OFF 10mA max.
Input current (max.) 24V models 3.25A max. @ Io max.
(See Note 4) and Vin = 18 to 36V
48V models 1.7A max. @ lo max.
and Vin = 36 to 75V
Input reflected ripple 24V models 20mA (pk-pk) typ.
(See Note 6) 48V models 50mA (pk-pk) typ.
Remote ON/OFF (See Note 15)
Logic compatibility Open collector ref to -input
ON Open circuit or >2VDC
OFF <1.2VDC
File Name: EXB50S.PDF Rev: 4 March 2004
INPUT SPECIFICATIONS Continued
Undervoltage lockout 24V Power up 17V max.
24V Power down 15V min.
48V Power up 33.2V max.
48V Power down 30.9V min.
Start-up time Power up 30ms
(See Note 7) Remote ON/OFF 25ms
EMC CHARACTERISTICS
Conducted emissions EN55022 (See Note 3) Level A
EN55022 (See Note 3) Level B
Radiated emissions EN55022 Level A
Immunity: (See Note 13)
ESD air EN61000-4-2 8kV (NP), 15kV (RP)
ESD contact EN61000-4-2 6kV (NP), 8kV (RP)
Radiated field enclosure EN61000-4-3 10V/m (NP)
Conducted (DC power) EN61000-4-6 10V (NP)
Conducted (signal) EN61000-4-6 10V (NP)
GENERAL SPECIFICATIONS
Efficiency See table
Basic insulation Input/output 1500VDC
Switching frequency Fixed 300kHz typ.
Approvals and IEC60950/EN60950, UL/cUL1950
standards (See Note 5) CSA C22.2 No. 950
Material flammability UL94V-0
Weight 50g (1.77oz)
MTBF MIL-HDBK-217F @ 25ºC 270,000
100% load ground benign hours
ENVIRONMENTAL SPECIFICATIONS
Thermal performance Operating ambient. -40°C to +70°C
(See Notes 11, 12 temperature (natural convection)
Non-operating -55°C to +125°C
ETS 300 019-2-3 Classes T3.1 to T3.5
Altitude 3,000 ,metres Derate max. output
(See Note 10) current by 20%
10,000m Derate max. output
current by 50%
PROTECTION
Short-circuit protection Continuous
Over-voltage protection Non-latching clamp
Thermal protection 120ºC hot spot temperature with
automatic recovery
TELECOM SPECIFICATION
Central office interface A ETS300-132-2, input voltage
and current requirements
For the most current data and application support visit www.artesyn.com/html/products.html
Notes
1Measured as per recommended set-up. 150mV pk-pk for EXB50-48S12.
2di/dt = 0.1A/µs, Vin = 24/48VDC, Tc = 25°C, load change = 0.5 lo max. to
0.75 lo max. and 0.75 lo max. to 0.5 lo max.
3The EXB50 meets level A and level B conducted emissions only with
external components connected before the input pins to the converter.
4Recommended input fusing is a 6.3A HRC 200V rated fuse on the 24V
and 3.15A HRC 200V rated fuse on the 48V.
5This product is only for inclusion by professional installers within other
equipment and must not be operated as a stand alone product.
6Simulated source impedance of 12µH. 12µH inductor in series with +Vin.
7Start-up into resistive load.
CAUTION: Hazardous internal voltages and high temperatures.
Ensure that unit is not user accessible.
EXB50 Series
Single output
DC/DC CONVERTERS 20-50W High Efficiency DC/DC Converters 2
OUTPUT INPUT OVP OUTPUT OUTPUT OUTPUT EFFICIENCY REGULATION MODEL
POWER VOLTAGE VOLTAGE CURRENT CURRENT (TYP.) LINE LOAD NUMBER (9)
(MAX.) (MIN.) (MAX.)
20W 18-36VDC 2.4VDC 2.0V 0A 10A 86.5% ±0.1% ±0.2% EXB50-24S2V0
33W 18-36VDC 3.9VDC 3.3V 0A 10A 89.0% ±0.1% ±0.2% EXB50-24S3V3(14)
50W 18-36VDC 6.0VDC 5.0V 0A 10A 90.0% ±0.1% ±0.2% EXB50-24S05
18W 36-75VDC 2.15VDC 1.8V 0A 10A 85.7% ±0.1% ±0.2% EXB50-48S1V8(15)
20W 36-75VDC 2.45VDC 2.0V 0A 10A 87.5% ±0.1% ±0.2% EXB50-48S2V0(15)
25W 36-75VDC 2.95VDC 2.5V 0A 10A 87.5% ±0.1% ±0.2% EXB50-48S2V5(15)
33W 36-75VDC 4.00VDC 3.3V 0A 10A 90.0% ±0.1% ±0.2%
EXB50-48S3V3(14,15)
50W 36-75VDC 6.15VDC 5.0V 0A 10A 91.0% ±0.1% ±0.2% EXB50-48S05(15)
50W 36-75VDC 14.2VDC 12.0V 0A 4.2A 90.0% ±0.1% ±0.2% EXB50-48S12(15)
Please consult our website for the following items: ✔ Application Note ✔ Longform Data Sheet www.artesyn.com
File Name: EXB50S.PDF Rev: 4 March 2004
Notes Continued
8EXB50-24S2V0 model has 5.0% max. deviation and 300µs recovery.
9Maximum output deviation is 10% inclusive of trim.
10 Contact factory for operation at higher altitude.
11 See Application Note 113 for de-rating curves.
12 Wide operating temperature on the EXB50-24S05 is -40ºC to +60ºC.
13 Input transient (48V) ETS300 132-2 ETR283.
14 100V, 100ms transient applies to the EXB50-24S3V3 and the EXB50-
48S3V3 models. Please add the suffix 'R03' to the model number e.g.
EXB50-48S3V3R03. This is also active low remote ON/OFF.
15 Active low remote ON/OFF available. Please add suffix '-R' to model
number e.g. EXB50-48S3V3-R
EXTERNAL OUTPUT TRIMMING
TRIM
UP
+ Sense
Trim
- Sense
TRIM
DOWN
RT1
or
RT2
Output can be externally trimmed
by using the method shown below.
For the most current data and application support visit www.artesyn.com/powergroup/products.htm
EXB50 Series
Single output
DC/DC CONVERTERS 20-50W High Efficiency DC/DC Converters 3
ALL DIMENSIONS IN INCHES (mm)
General Tolerance ±0.010 (0.25)
Unless Otherwise Specified
STAND-OFFS
4 PLACES
9
5
8
7
6
4
1
3
1.90
(48.26) 0.19
(4.83)
2.28 ±0.02
(57.91 ±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)
BOTTOM
VIEW
OPEN-FRAME
HEIGHT
Ø0.040 ±0.02
(Ø1.02 ±0.05)
0.02
(0.50)
0.16±0.02
(4.10±0.5)
0.138±0.02
(3.50±0.5)
0.43±0.02
(10.90±0.5)
Ø0.079±0.002
(Ø2.03±0.05)
Data Sheet © Artesyn Technologies
®
2004
The information and specifications contained in this data sheet are believed to be correct at time of publication. However, Artesyn Technologies accepts no responsibility for consequences arising
from printing errors or inaccuracies. Specifications are subject to change without notice. No rights under any patent accompany the sale of any such product(s) or information contained herein.
Please consult our website for the following items: ✔ Application Note ✔ Longform Data Sheet www.artesyn.com
File Name: EXB50S.PDF Rev: 4 March 2004
International Safety Standard Approvals
UL/cUL CAN/CSA 22.2 No. 60950-00 : UL 60950
file No. E174104
TÜV TÜV Product Service. Certificate No. B 02 02 38572 031
PIN CONNECTIONS
PIN NUMBER FUNCTION
1-Vin
2No Pin
3Remote ON/OFF
4+Vin
5+Vout
6+Sense
7Trim
8-Sense
9-Vout
