DC/DC CONVERTERS 50W 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 (0.8V to 3.6V for EXB50-48D3V3-1V8,
1.5V to 5.25V for EXB50-48D05-3V3)
•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
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 8.5A from either
output, and up to 11A in total, at temperatures of up to 70ºC under natural convection. With
some forced air and/or reduced ambient temperatures, the EXB50 can deliver up to 8.5A from
either output, and up to 17A 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 over-temperature protection combines to
make the EXB50 Dual a very robust and flexible product.
All specifications are typical at Vin = 48V, Io1 = 5A, Io2 = 5A, 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 8kV (NP), 15kV (RP)
ESD contact EN61000-4-2 6kV (NP), 8kV (RP)
EFT DC power EN61000-4-4 2kV (NP), 4kV (LFS)
EFT signal EN61000-4-4 1kV (NP), 2kV (LFS)
Radiated field enclosure EN61000-4-3 10V/m (NP)
Surges indoor signal EN61000-4-5 500V (RP)
Conducted (DC power) EN61000-4-6 10V (NP)
Conducted (signal) EN61000-4-6 10V (NP)
Input transients ETS 300 132-2, ETR 283
GENERAL SPECIFICATIONS
Efficiency 89% typ.
Basic insulation Input/output 1500VDC
Input fuse 48V (See Note 2) 4A slow blow HRC
Switching frequency EXB50-48D3V3-1V8 250kHz
(fixed) EXB50-48D05-3V3 300kHz
Approvals and IEC60950
standards UL/cUL1950
Material Flammability UL94V-0
Weight 42g (1.48oz)
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 EXB50-48D3V3-1V8 0.8V to 3.6V
EXB50-48D05-3V3 1.5V to 5.25V
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 150mV pk-pk max.
20MHz bandwidth 30mV rms max.
Transient response 3A to 5A (1A/10µs) 150mV
peak dev. settling time and back 400µs
Short circuit protection EXB50-48D3V3-1V8 17A rms
EXB50-48D05-3V3 15A rms
INPUT SPECIFICATIONS
Input voltage range 48Vin nominal 36 to 75VDC
Input current No load 100mA max.
Remote OFF 4mA max.
UVLO turn ON voltage All inputs 34V typ.
UVLO turn OFF voltage All inputs 33V typ.
Active high remote ON/OFF
Logic compatibility Open collector ref. to -input
ON Open circuit voltage or >3.2VDC
OFF (See Note 7) <0.4VDC
Active low remote ON/OFF
Logic compatibility Open collector ref. to -input
ON 0.4VDC max.
OFF (See Note 7) Open circuit voltage or >3.2VDC
SPECIFICATIONS
File Name: EXB50D.PDF Rev: 10 June 2002
TÜV
Data Sheet © Artesyn Technologies
®
2002
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.
For the most current data and application support visit www.artesyn.com/powergroup/products.htm
Notes
1Latching OVP response time is 2ms (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 110ºC. See Application
Note 127 on Artesyn Technologies website www.artesyn.com.
5See the long form data sheet for derating curves.
6For stable operation connect an external output capacitor of at least 100µF
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-R.
8Maximum total current from the module is 15A for EXB50-48D05-3V3 and
17A for EXB50-48D3V3-1V8 with airflow.
EXB50 Dual Series
Dual positive output
DC/DC CONVERTERS 50W High Efficiency DC/DC Converters 2
Please consult our website for the following items: ✔ Application Note ✔ Longform Data Sheet www.artesyn.com
File Name: EXB50D.PDF Rev: 10 June 2002
INPUT OUTPUT VOLTAGE OUTPUT CURRENT (8) OVP (1) TYPICAL MODEL
VOLTAGE 1 2 1 2 1 2 EFFICIENCY NUMBER (7)
36-75VDC 3.3V 1.8V 8.5A 8.5A 4.12V 2.34V 86.4% EXB50-48D3V3-1V8
36-75VDC 5V 3.3V 7.5A 7.5A 6.25V 4.12V 89% EXB50-48D05-3V3
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 protection Continuous
Overvoltage protection Latching
Thermal protection 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
