EXB50 Dual Series
DC/DC CONVERTERS
50W High Efficiency DC/DC Converters
•
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
Dual positive output
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
/
2
brick 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
TÜV
2 YEAR WARRANTY
SPECIFICATIONS
OUTPUT SPECIFICATIONS
Voltage adjustability
Voltage accuracy
Line regulation
Load regulation
Minimum load
Ripple and noise
20MHz bandwidth
Transient response
peak dev. settling time
Short circuit protection
EXB50-48D3V3-1V8
EXB50-48D05-3V3
Both outputs
Low line to high line
Low line to high line
Full load to no load
Both outputs
Both outputs
3A to 5A (1A/10µs)
and back
EXB50-48D3V3-1V8
EXB50-48D05-3V3
0.8V to 3.6V
1.5V to 5.25V
±0.5% max.
Vout1 ±0.5%
Vout2 ±0.5%
±0.5%
0%
150mV pk-pk max.
30mV rms max.
150mV
400µs
17A rms
15A rms
EMC CHARACTERISTICS
ETS 300 386-1 table 5
Conducted emissions
(See Note 3)
Radiated emissions
Immunity:
ESD air
ESD contact
EFT DC power
EFT signal
Radiated field enclosure
Surges indoor signal
Conducted (DC power)
Conducted (signal)
Input transients
EN55022 with external filter
EN55022 with external filter
EN55022
Level A
Level B
Level A
EN61000-4-2 8kV (NP), 15kV (RP)
EN61000-4-2 6kV (NP), 8kV (RP)
EN61000-4-4 2kV (NP), 4kV (LFS)
EN61000-4-4 1kV (NP), 2kV (LFS)
EN61000-4-3 10V/m (NP)
EN61000-4-5 500V (RP)
EN61000-4-6 10V (NP)
EN61000-4-6 10V (NP)
ETS 300 132-2, ETR 283
GENERAL SPECIFICATIONS
Efficiency
Basic insulation
Input fuse 48V
Switching frequency
(fixed)
Approvals and
standards
Material Flammability
Weight
MTBF
MIL-HDBK-217
Input/output
(See Note 2)
EXB50-48D3V3-1V8
EXB50-48D05-3V3
89% typ.
1500VDC
4A slow blow HRC
250kHz
300kHz
IEC60950
UL/cUL1950
UL94V-0
42g (1.48oz)
177,362 hours
INPUT SPECIFICATIONS
Input voltage range
Input current
UVLO turn ON voltage
UVLO turn OFF voltage
48Vin nominal
No load
Remote OFF
All inputs
All inputs
36 to 75VDC
100mA max.
4mA max.
34V typ.
33V typ.
Active high remote ON/OFF
Logic compatibility
ON
OFF (See Note 7)
Active low remote ON/OFF
Logic compatibility
ON
OFF (See Note 7)
Open collector ref. to -input
Open circuit voltage or >3.2VDC
<0.4VDC
Open collector ref. to -input
0.4VDC max.
Open circuit voltage or >3.2VDC
ENVIRONMENTAL SPECIFICATIONS
Thermal performance
(See Notes 4 and 5)
ETS 300 019-2-3
Air temperature
Operating ambient
temperature
Non-operating
-40°C to +100°C,
see curves
-40°C to +120°C
Classes T3.1 to T3.5
Low: IEC 68-2-1
-40°C
High: IEC 68-2-2
+70°C
Change: IEC 68-2-14
-40°C to +70°C
IEC 68-2-56
10% to 100% RH
IEC 68-2-30
Condensation
File Name: EXB50D.PDF Rev: 10 June 2002
Relative humidity
ARTESYN [ ARTESYN TECHNOLOGIES ]
