EXA40 Series
•
•
•
•
•
•
•
The EXA40 Series, comprising 8 different models is targeted specifically at the
telecommunications, industrial electronics, mobile Telecommunications and distributed
power markets. The series offers two wide input voltage ranges of 18 Vdc to 36 Vdc and
36 Vdc to 75 Vdc. Typical efficiencies are 91% for the 5 V output, 88% for the 3.3 V, 86%
for the 2.75 V and 84% for the 1.8 V. The series has been designed primarily for
Telecommunications applications and complies with ETS 300 386-1 immunity and emission
standards for high priority of service class. In addition the series complies with ETS 300
019-1-3 environmental standards (all classes) including shock, vibration, humidity and
thermal performance. A high level of reliability has been designed into all models through
the extensive use of conservative derating criteria. Remote enable and overtemperature
shutdown are included as standard while true latching OVP is available as an option.
All specifications are typical at nominal input, full load at 25 °C unless otherwise stated
DC-DC CONVERTERS
OUTPUT SPECIFICATIONS
Voltage adjustability
(See Note 10)
Voltage accuracy
Line regulation
Load regulation
Minimum load
Ripple and noise
20 MHz bandwidth
Temperature coefficient
Transient response
Peak dev. settling time
Short circuit protection
(See Note 5)
INPUT SPECIFICATIONS
Input voltage range
Input current
UVLO turn ON voltage
UVLO turn OFF voltage
Start-up time
Active high remote ON/OFF
Logic compatibility
ON
OFF
INPUT SPECIFICATIONS
ETS 300 386-1 table 5
Conducted emissions
(See Design Note 102)
High efficiency topology, 91% typical at 5 V
Approved to EN60950, UL1950, CSA C22.2 No. 950
Operating ambient temperature of -40 °C to +70 °C
(natural convection)
Complies with ETS 300 019-1-3/2-3
Complies with ETS 300 132-2 input voltage and current
requirements
Fully compliant with ETS 300 386-1
RoHS Compliant
2.75 V, 3.3 V, 5 V
1.8 V output
Low line to high line
Full load to no load
50% to 75% and back
to 1.0%, no external cap.
24 Vin nominal
48 Vin nominal
No load
Remote OFF
All inputs (See Note 4)
All inputs (See Note 4)
Nominal line
Open circuit voltage
EN55022, internal filter and
two 4 µF film capacitors
EN55022, external filter
S i n g l e o u t p u t
40 W High Efficiency DC-DC Converters
100 mV pk-pk max.
automatic recovery
20 mV rms max.
Open Collector
+12/-17% min.
100 mA max.
ref. to -input
Continuous
±0.01%/°C
±10% min.
4 mA max.
18-36 Vdc
36-75 Vdc
<1.0 Vdc
+0.05%
+0.20%
100 mV
4.5 Vdc
Level B
Level A
250 µs
±1.0%
50 ms
94%
86%
0%
EMC CHARACTERISTICS (Cont.)
Radiated emissions
ESD air
ESD contact
Surge (500 V)
Fast transients
Radiated immunity
Conducted immunity
GENERAL SPECIFICATIONS
Efficiency
Basic insulation
Input fuse 24 V
Input fuse 48 V
Switching frequency
Approvals and
standards
(See Notes 7, 8, 9)
Weight
MTBF
(See Design Note 102)
ENVIRONMENTAL SPECIFICATIONS
Thermal performance
Over temperature
shutdown
ETS 300 019-2-3
Air temperature
Relative humidity
Vibration, Class 3M5
Shock, Class 3M5
EN55022 (See Design Note 102) Level B
EN61000-4-2, level 3
EN61000-4-2, level 4
EN61000-4-5, level 3, 4
EN61000-4-4, level 3, 4
EN61000-4-3, level 3
EN61000-4-6, level 3
Input/output
(See Note 8)
Fixed
MIL-HDBK-217
Operating ambient
temperature
Non-operating
Loss of Function
Self-Recovery (LFS)
Low: IEC 68-2-1
High: IEC 68-2-2
Change: IEC 68-2-1
IEC 68-2-56
IEC 68-2-30
IEC68-2-6
MIL-STD-202F
IEC-68-2-29
MIL-STD-202F
File Name: exa40.pdf Rev (02): 09 Dec 2005
SPECIFICATIONS
Method 213B cond. A
2 YEAR WARRANTY
Classes T3.1 to T3.5
Method 204 cond. A
CSA C22.2 No. 950
2-9 Hz, 3 mm disp.
-55 °C to +105 °C
10% to 100% RH
-40 °C to +70 °C,
-40 °C to +70 °C
3.5 A slow blow
2.0 A slow blow
75 °C to +85 °C
250,000 hours
Condensation
25 g (0.88 oz)
9-200 Hz 1 g
See curves
See table
1500 Vdc
EN60950
300 kHz
UL1950
+70 °C
-40 °C
1