DC-DC CONVERTERS 50 W High Efficiency DC-DC Converters 1
2 YEAR WARRANTY
EXB50 Dual Series
Dual positive output
•Two independently regulated positive outputs
•Each output offers ultra-wide output voltage
trim range
•High efficiency topology, 89% typical
•Approved to IEC60950, UL/cUL1950
•Operating ambient temperature of -40 °C to +70 °C
(natural convection)
•No minimum load on either output
•Complies with ETS 300 019-1-3/2-3 and ETS 300 386-1
•Available RoHS compliant
The EXB50 Dual is a 50W independently regulated dual output dc-dc converter specifically
designed to meet the power needs of low voltage silicon. Housed in an open-frame package
with an industry standard 1/2brick footprint, the EXB50 Dual can deliver up to 8.5 A from either
output, and up to 11 A in total, at temperatures of up to 70 ºC under natural convection. With
some forced air and/or reduced ambient temperatures, the EXB50 can deliver up to 8.5 A from
either output, and up to 17 A in total. The converter is primarily intended for the networking,
telecoms and wireless markets, where small size, lower output voltages with higher currents,
low profile and high efficiency are all key demands. Product features include wide output trim
and remote on/off. Overvoltage, short circuit and overtemperature protection combines to make
the EXB50 Dual a very robust and flexible product.
All specifications are typical at Vin = 48 V, Io1 = 5 A, Io2 = 5 A, Tamb = 25 °°C unless otherwise stated
EMC CHARACTERISTICS
ETS 300 386-1 table 5
Conducted emissions EN55022 with external filter Level A
(See Note 3) EN55022 with external filter Level B
Radiated emissions EN55022 Level A
Immunity:
ESD air EN61000-4-2 8 kV (NP), 15 kV (RP)
ESD contact EN61000-4-2 6 kV (NP), 8 kV (RP)
EFT dc power EN61000-4-4 2 kV (NP), 4 kV (LFS)
EFT signal EN61000-4-4 1 kV (NP), 2 kV (LFS)
Radiated field enclosure EN61000-4-3 10 V/m (NP)
Surges indoor signal EN61000-4-5 500 V (RP)
Conducted (dc power) EN61000-4-6 10 V (NP)
Conducted (signal) EN61000-4-6 10 V (NP)
Input transients ETS 300 132-2, ETR 283
GENERAL SPECIFICATIONS
Efficiency 89% typ.
Basic insulation Input/output 1500 Vdc
Input fuse 48 V (See Note 2) 4 A slow blow HRC
Switching frequency EXB50-48D3V3-1V8J 250 kHz
(fixed) EXB50-48D05-3V3J 300 kHz
Approvals and IEC60950
standards UL/cUL1950
Material Flammability UL94V-0
Weight 42 g (1.48 oz)
MTBF MIL-HDBK-217 177,362 hours
ENVIRONMENTAL SPECIFICATIONS
Thermal performance Operating ambient -40 °C to +100 °C,
(See Notes 4 and 5) temperature see curves
Non-operating -40 °C to +120 °C
ETS 300 019-2-3 Classes T3.1 to T3.5
Air temperature Low: IEC 68-2-1 -40 °C
High: IEC 68-2-2 +70 °C
Change: IEC 68-2-14 -40 °C to +70 °C
Relative humidity IEC 68-2-56 10% to 100% RH
IEC 68-2-30 condensation
OUTPUT SPECIFICATIONS
Voltage adjustability EXB50-48D3V3-1V8J 0.8-3.6 Vdc
EXB50-48D05-3V3J 1.5-5.25 Vdc
Voltage accuracy Both outputs ±0.5% max.
Line regulation Low line to high line Vout1 ±0.5%
Low line to high line Vout2 ±0.5%
Load regulation Full load to no load ±0.5%
Minimum load Both outputs 0%
Ripple and noise Both outputs 150 mV pk-pk max.
20 MHz bandwidth 30 mV rms max.
Transient response 3 A to 5 A (1 A/10 µs) 150 mV
peak dev. settling time and back 400 µs
Short circuit protection EXB50-48D3V3-1V8J 17 A rms
EXB50-48D05-3V3J 15 A rms
INPUT SPECIFICATIONS
Input voltage range 48 Vin nominal 36-75 Vdc
Input current No load 100 mA max.
Remote OFF 4 mA max.
UVLO turn ON voltage All inputs 34 V typ.
UVLO turn OFF voltage All inputs 33 V typ.
Active high remote ON/OFF
Logic compatibility Open collector ref. to -input
ON Open circuit voltage or >3.2 Vdc
OFF (See Note 7) <0.4 Vdc
Active low remote ON/OFF
Logic compatibility Open collector ref. to -input
ON 0.4 Vdc max.
OFF (See Note 7) Open circuit voltage or >3.2 Vdc
SPECIFICATIONS
File Name: exb50d.pdf Rev (02): 30 Nov 2005
International Safety Standard Approvals
UL/cUL CAN/CSA 22.2 No. E174104
UL 60950 File No. E174104
TÜV Product Service (EN60950) Certificate No. B 01 09 38572 024
CB report and certificate to IEC60950
Datasheet © Artesyn Technologies
®
2005
The information and specifications contained in this datasheet 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.
For the most current data and application support visit www.artesyn.com/powergroup/products.htm
NNootteess
1Latching OVP response time is 2 ms (typ.). OVP latch is reset by toggling
the control input, or by cycling the input voltage.
2User must provide recommended fuses in order to comply with safety
approvals.
3Meets both level A and level B conducted emissions only with external
components connected before the input pins to the converter.
4Maximum temperature on hotspots not to exceed 110 ºC. See Application
Note 127 on Artesyn Technologies website www.artesyn.com.
5See the longform datasheet for derating curves.
6For stable operation connect an external output capacitor of at least
100 µF to each output. Recommended capacity AVX TPS series
(e.g. TPSD107*010#0100) or equivalents.
7Active low remote ON/OFF, is available. Standard product is active high.
Designate with the suffix ‘-R’ e.g. EXB50-48D05-3V3-RJ.
8Maximum total current from the module is 15 A for EXB50-48D05-3V3J and
17 A for EXB50-48D3V3-1V8J with airflow.
9The ‘J’ suffix 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.
10 NOTICE: Some models do not support all options. 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.
EXB50 Dual Series
Dual positive output
DC-DC CONVERTERS 50 W High Efficiency DC-DC Converters 2
Please consult our website for the following items: Application Note Longform Datasheet www.artesyn.com
File Name: exb50d.pdf Rev (02): 30 Nov 2005
INPUT OUTPUT VOLTAGE OUTPUT CURRENT (8) OVP (1) TYPICAL MODEL
VOLTAGE 1 2 1 2 1 2 EFFICIENCY NUMBER (7,9,10)
36-75 Vdc 3.3 V 1.8 V 8.5 A 8.5 A 4.12 V 2.34 V 86.4% EXB50-48D3V3-1V8J
36-75 Vdc 5 V 3.3 V 7.5 A 7.5 A 6.25 V 4.12 V 89% EXB50-48D05-3V3J
1.900
(48.26)
2.280±0.02
(57.91±0.5)
Ø0.040 ±0.002
(Ø1.02 ±0.05)
9 Places
Max open-frame
converter height
All dimensions in inches (mm)
General tolerance ±0.01in (±0.25mm)
except where specified otherwise
Minimum clearance from
bottom of converter to
lowest component
0.394
(10.00)
Max
0.138
(3.50)
0.015
(0.37)
Min
Control
1.000
(25.40)
1.400
(35.56)
2.400±0.02
(60.96±0.5)
0.500
(12.70)
Vin-
Vin+
Vo1+
Vo1-
Trim2
Trim1
Vo2-
Vo2+
1.600
(40.64)
1.300
(33.02)
1.000
(25.40)
0.600
(15.24)
0.300
(7.62)
0.400
(10.16)
BOTTOM
VIEW
CAUTION: Hazardous internal voltages and high temperatures.
Ensure that unit is not user accessible.
PROTECTION
Short circuit Continuous
Overvoltage Latching
Thermal 125 °C with
automatic recovery
TELECOM SPECIFICATION
Central office interface A ETS300-132-2 input voltage
and current requirements
PIN CONNECTIONS
PIN NUMBER FUNCTION
1- Vin
2 No Pin
3 Remote ON/OFF
4+ Vin
5 Vo1 Trim
6 Vo1 Return
7 Vo1+
8 Vo2 Trim
9 Vo2 Return
10 Vo2+
TRIM
UP
TRIM
- OUT
+ OUT
- OUT
TRIM
TRIM
DOWN
TRIM
+ OUT
EXTERNAL OUTPUT TRIMMING
