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CBAMTM EFIL-28
All parameters measured TA=25ºC, and 200W of output power unless otherwise noted.
Input Parameters
Model EFIL-28 Units
Input Voltage Range MIN 9.5
TYP 28 VDC
MAX 36
Input Overvoltage 100ms MAX 50 VDC
Reverse Polarity Protection None (1)
Input Current MAX 20 A
Efciency TYP 99 %
Recommended Input Fuse (2)
Output Parameters
Output Voltage Vout = Vin - (lin x Rdc) VDC
DC Resistance (Rdc) TYP 5 mOhm
Output Power (4) (5) MAX 200 W
External Output Capacitance Required (5) (6) See Table 1
Electromagnetic Compliance (7)
Standard Test
Conducted Emissions MIL-STD-461E CE101, CE102
Notes:
(1) Reverse Polarity Protection: Reverse polarity will NOT damage (10) Calex CBAMTM modules are designed to withstand most
the module. However, precautions must be taken to ensure solder/wash processes. Careful attention should be used
downstream circuitry is protected. Calex HEW series DC/DC when assessing the applicability in your specic manufacturing
converters implement reverse polarity protection. process. The CBAMTM modules are not hermetically sealed.
(2) Refer to the CALEX Application Notes for information on fusing. (11) Torque fasteners into threaded mounting inserts at 12 in.oz. or
(3) Thermal impedance is tested with the module mounted vertically less. Greater torque may result in damage to the unit and void
and facing another printed circuit board 1/2 inch away. the warranty.
(4) Contact the factory for higher output power capabilities. (12) MTBF is calculated based on MIL-HDBK-217F under the following
(5) Due to the negative input resistance characteristics of DC/DC conditions:
converters, the addition of an input lter may cause instability. To Reliability prediction method = Part Stress Analysis
ensure a stable system, the output impedance of the lter must Baseplate temperature = 40ºC
be smaller in magnitude than the converter input impedance. Environment = Ground, Benign
This can be ensured with the addition of an external capacitor (13) Available with RoHS and Non-RoHS construction, contact factory
connected to the input of the converter. Under normal operating for details.
conditions, specied as 28VDC input at 200 Watts, the EFIL-28 (14) RoHS Compliance:
does not require any external capacitance. See Calex Website www.calex.com/RoHS.html for the complete
(6) Due to the added inductance (50 µH) of the Line Impedance RoHS Compliance statement.
Stabilization Network (LISN) used in MIL-STD-461E testing, The RoHS marking is as follows.
capacitor C1 is required to maintain converter stability. See
Figures 2 and 3.
(7) Measurements comply with the requirements set forth in MIL-
STD-461E, CE101 and CE102.
(8) The case thermal impedance is dened as the case temperature
rise over ambient per package watt dissipated.
(9) Isolation is measured by applying a DC voltage between pins and
baseplate.
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
2 6/4/09
CBAMTM EFIL-28
General Specications
Model EFIL-28 Units
Isolation
Baseplate to Pins (9) MIN 700 VDC
Environmental
Baseplate Operating Temp Range MIN -40 ºC
MAX 100
Storage Temperature Range MIN -40 ºC
MAX 120
Case Thermal Impedance (3), (8) TYP 7 ºC/Watt
MTBF MIL-STD-217F (12) 710,705 h
General
Unit Weight TYP 95 g
Case Dimension 2.28" x 2.40" x 0.50"
Torque on Mounting Inserts (11) MAX 12 in. oz.
Pin Pin Dia. Function Mechanical tolerances unless otherwise noted:
X.XX dimensions: ±0.020 inches
1 0.080" - INPUT X.XXX dimensions: ±0.005 inches
2 0.040" BASEPLATE
4 0.080" + INPUT
5 0.080" - OUTPUT
9 0.080" + OUTPUT
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
3 6/4/09
CBAMTM EFIL-28
Table 1. External Components
Component Rating / Type Drawing Notes
No Capacitor Required Figure 1. For Vin 18 VDC
C1 220 µF, 100 VDC, Figure 2 and 3 For 9.5 Vin <18 VDC and with EMI
Electrolytic Test Setup. See Notes (5) (6)
0.01 µF, 1000 VDC, Figure 1, 2 and 3 Converter Common mode capacitors
C3, C4
Ceramic
Figure 2. EFIL-28 with Calex HEW Series DC/DC Converter
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
4 6/4/09
CBAMTM EFIL-28
MIL-STD-461E Conducted Emissions Results CE102, 28VDC Input
Figure 3. MIL-STD-461E CE102 Test Conguration
EFIL-28 with 24S3.30HEW, Full Load
EFIL-28 with 24S5.30HEW, Full Load
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
Telefon (089) Fax: 925-687-3333 www.calex.com Email: sales@calex.com
5
info@compumess.de · www.compumess.de · www.netzteile.de 6/4/09
CBAMTM EFIL-28
EFIL-28 with 24S12.12HEW, Full Load
EFIL-28 with 24S15.10HEW, Full Load
EFIL-28 with 24S24.6HEW, Full Load
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
Telefon (089) Fax: 925-687-3333 www.calex.com Email: sales@calex.com
6
info@compumess.de · www.compumess.de · www.netzteile.de 6/4/09
CBAMTM EFIL-28
MIL-STD-461E Conducted Emissions Results CE101, 28VDC Input
EFIL-28 with 24S3.30HEW, Full Load
EFIL-28 with 24S5.30HEW, Full Load
EFIL-28 with 24S12.12HEW, Full Load
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
CompuMess Fax: 925-687-3333 www.calex.com Email: sales@calex.com
Telefon (089)7 15 01 - 0 · Telefax (089) 32 15 01 - 11
32 6/4/09
info@compumess.de · www.compumess.de · www.netzteile.de
CBAMTM EFIL-28
EFIL-28 with 24S15.10HEW, Full Load
EFIL-28 with 24S24.6HEW, Full Load
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
8 6/4/09
CBAMTM EFIL-28
EFIL-28 Application Section
Filter Operation Using Remote ON/OFF
Care must be taken when using an input lter in front Some Calex Converters use a remote ON/OFF function
of any DC/DC converter. The negative input resistance for conserving battery power or limiting inrush current
characteristic of the converter can cause instability if the when the converter is used in pulsed applications. The
output impedance of the lter is larger (in magnitude) than reference for this pin is the -Input of the converter. When
the input resistance of the converter. To make certain this implementing the Remote ON/OFF with the EFIL-28
does not occur, a properly sized, low ESR electrolytic module connected, an isolated relay or optocoupler is
capacitor is connected to the input of the converter. This necessary. This is due to the use of a common mode
effectively drops the impedance the converter "sees" inductor in the EFIL-28. Any DC current bypassed from
looking out of its input pins. This behavior will be at the lter may cause saturation of this inductor and will
its worst at low line voltage conditions, a result of the severely degrade the ltering performance.
constant power characteristic of the DC/DC converter. See Figure 4 and 5 for recommended circuits.
The lower input voltage leads to a larger input current,
thus decreasing the input impedance of the converter. As
a result, a larger value capacitor is required across the
input. Table 1 on page 4 shows the capacitance required
for proper operation. This assumes that the DC source
providing the power has sufciently low impedance. Most
adequately sized power supplies or batteries should not
have a problem with this matter.
Inductance of the input line may also contribute to
instability. In the case of MIL-STD-461E, a LISN with
50µH of inductance is required for testing. To compensate
for the inductance, a low ESR electrolytic capacitor
Figure 4.
was connected between the lter and converter; (see Isolated ON/OFF driver using an optocoupler
Table 1 and Figure 3). In addition, consider temperature
range requirements. Electrolytic capacitors decrease
in capacitance as temperature decreases, therefore a
larger value may be necessary to account for worst-case
conditions. The EFIL-28 is designed to meet MIL-STD-
461E CE101 and CE102 requirements at 25ºC.
Baseplate Connection
For best EMI performance, it is recommended to mount
both the EFIL-28 and the Calex Converter directly to
chassis ground. This results in a low impedance path
from the internal EMI ground to chassis ground. If
this is not possible, connect to chassis ground via the Figure 5.
"Baseplate" pin on the EFIL-28 and the "Case" pin on the Low power relay which also offers isolation
Calex Converter. The use of heavy gauge wire and the
shortest possible path will minimize the impedance and
improve performance.
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
9 6/4/09
CBAMTM EFIL-28
Using Two Calex Converters
It is possible to effectively lter up to two (2) Calex DC/
DC converters using one (1) EFIL-28 module. However,
the EFIL-28 maximum power rating of 200W must not be
exceeded. This results in operating 2 converters at less
than their maximum power output. With 28VDC input,
this means approximately 7.2 amperes through the
EFIL-28. Another precaution that must be taken is the
addition of external capacitance between the lter and
converters. Figure 6 shows the connection diagram with
the required external capacitors. For operation below
28VDC input, these capacitors will need to increase
to 470µF each. Note the external Y-capacitors at each
converter output and at the input of the second converter.
Contact the factory for lters with increased output power
capabilities.
Figure 6. Connection diagram for 2 Calex DC/DC Converters
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
10 6/4/09
CBAMTM EFIL-28
Additional Data:
MIL-STD-461E Conducted Emissions Results CE102, 24VDC Input
EFIL-28 with 24S3.30HEW, 24VDC Input, Full Load
EFIL-28 with 24S5.30HEW, 24VDC Input, Full Load
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
11 6/4/09
CBAMTM EFIL-28
EFIL-28 with 24S12.12HEW, 24VDC Input, Full Load
EFIL-28 with 24S15.10HEW, 24VDC Input, Full Load
EFIL-28 with 24S24.6HEW, 24VDC Input, Full Load
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
Telefon (089) Fax: 925-687-3333 www.calex.com Email: sales@calex.com
info@compumess.de · www.compumess.de · www.netzteile.de
12 6/4/09
CBAMTM EFIL-28
MIL-STD-461E Conducted Emissions Results CE101, 24VDC Input
EFIL-28 with 24S3.30HEW, 24VDC Input, Full Load
EFIL-28 with 24S5.30HEW, 24VDC Input, Full Load
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
info@compumess.de · www.compumess.de · www.netzteile.de
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
13 6/4/09
CBAMTM EFIL-28
EFIL-28 with 24S12.12HEW, 24VDC Input, Full Load
EFIL-28 with 24S15.10HEW, 24VDC Input, Full Load
EFIL-28 with 24S24.6HEW, 24VDC Input, Full Load
CompuMess Elektronik GmbH · Lise-Meitner-Str. 1 · D-85716 Unterschleißheim
2401 Stanwell Drive, Concord Ca. 94520 Ph: 925-687-4411 Fax: 925-687-3333 www.calex.com Email: sales@calex.com
Telefon (089) 32 15 01 - 0 · Telefax (089) 32 15 01 - 11
14 6/4/09
info@compumess.de · www.compumess.de · www.netzteile.de