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| 型号： | EXB50-48D3V3-1V8 |
| 英文描述： | 50W High Efficiency DC/DC Converters |
| 中文描述： | 50瓦高效率DC / DC转换器 |
| 文件页数： | 1/2页 |
| 文件大小： | 59K |
| 代理商： | EXB50-48D3V3-1V8 |
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 1/2 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 70C 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/10s)
150mV
peak dev. settling time
and back
400s
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
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