EXB50 Datasheet, PDF (1/2 Pages) Artesyn Technologies – 50W High Efficiency DC/DC Converters

EXB50 Dual Series
Dual positive output
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
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
1
TÜV
2 YEAR WARRANTY
SPECIFICATIONS
OUTPUT SPECIFICATIONS
Voltage adjustability
EXB50-48D3V3-1V8
EXB50-48D05-3V3
0.8V to 3.6V
1.5V to 5.25V
Voltage accuracy
Both outputs
±0.5% max.
Line regulation
Low line to high line
Low line to high line
Vout1 ±0.5%
Vout2 ±0.5%
Load regulation
Full load to no load
±0.5%
Minimum load
Both outputs
0%
Ripple and noise
20MHz bandwidth
Both outputs
150mV pk-pk max.
30mV rms max.
Transient response
3A to 5A (1A/10µs)
peak dev. settling time and back
150mV
400µs
Short circuit protection EXB50-48D3V3-1V8
EXB50-48D05-3V3
17A rms
15A rms
INPUT SPECIFICATIONS
Input voltage range
48Vin nominal
36 to 75VDC
Input current
No load
Remote OFF
100mA max.
4mA max.
UVLO turn ON voltage All inputs
UVLO turn OFF voltage All inputs
34V typ.
33V typ.
Active high remote ON/OFF
Logic compatibility
ON
OFF (See Note 7)
Open collector ref. to -input
Open circuit voltage or >3.2VDC
<0.4VDC
Active low remote ON/OFF
Logic compatibility
ON
OFF (See Note 7)
Open collector ref. to -input
0.4VDC max.
Open circuit voltage or >3.2VDC
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
89% typ.
Basic insulation
Input/output
1500VDC
Input fuse 48V
(See Note 2)
4A slow blow HRC
Switching frequency
(fixed)
EXB50-48D3V3-1V8
EXB50-48D05-3V3
250kHz
300kHz
Approvals and
standards
IEC60950
UL/cUL1950
Material Flammability
UL94V-0
Weight
42g (1.48oz)
MTBF
MIL-HDBK-217
177,362 hours
ENVIRONMENTAL SPECIFICATIONS
Thermal performance
(See Notes 4 and 5)
Operating ambient
temperature
Non-operating
-40°C to +100°C,
see curves
-40°C to +120°C
ETS 300 019-2-3
Classes T3.1 to T3.5
Air temperature
Low: IEC 68-2-1
High: IEC 68-2-2
Change: IEC 68-2-14
-40°C
+70°C
-40°C to +70°C
Relative humidity
IEC 68-2-56
IEC 68-2-30
10% to 100% RH
Condensation
File Name: EXB50D.PDF Rev: 10 June 2002