- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373979 > ADDC02812 (Analog Devices, Inc.) 28 V/100 W DC/DC Converters(帶積分EMI濾波器的DC-DC轉(zhuǎn)換器) PDF資料下載
參數(shù)資料
| 型號： | ADDC02812 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 28 V/100 W DC/DC Converters(帶積分EMI濾波器的DC-DC轉(zhuǎn)換器) |
| 中文描述： | 中西區(qū)區(qū)議會28 V/100 / DC轉(zhuǎn)換器（帶積分的EMI濾波器的的DC - DC轉(zhuǎn)換器） |
| 文件頁數(shù)： | 16/20頁 |
| 文件大?。?/td> | 208K |
| 代理商： | ADDC02812 |
–16–
ADDC02812DA/ADDC02815DA
Figure 16 shows test results for the vertical measurement and
compares them against the most stringent RE102 requirement;
the horizontal measurement (30 MHz and above) was similar.
As can be seen, the emissions just meet the standard in the
18 MHz–28 MHz range. T his component of the emissions is
due to common-mode currents flowing through the input power
leads. As mentioned in the section on CE102 above, the level of
common-mode current that flows is dependent on how the load
is connected. T his measurement is therefore a good indication
of how well the converter will perform in the final configuration,
but the user should confirm RE102 testing in the final system.
RS101
: T his requirement is specialized and is intended to
check for sensitivity to low frequency magnetic fields in the
30 Hz to 50 kHz range. T he converter is designed to meet this
requirement. Consult factory for more information.
RS103
: T his test calls for correct operation during and after the
unit under test is subjected to radiated electric fields in the
10 kHz to 40 GHz range. T he intent is to simulate electro-
magnetic fields generated by antenna transmissions. T he con-
verter is designed to meet this requirement. Consult factory for
more information.
Circuit Setup for E MI T est
Figure 17 shows a schematic of the test setup used for the EMI
measurements discussed above. T he output of the converter is
connected to a resistive load designed to draw full power. T here
is a 0.1
μ
F capacitor placed across this resistor that typifies
by-pass capacitance normally used in this application. At the
input of the converter there are two differential capacitors (the
larger one having a series resistance) and two small common-
mode capacitors connected to case ground. T he case itself was
connected to the metal ground plane in the test chamber. For
the RE102 test, a metal screen box was used to cover both the
converter and its load (but not the two meters of input power
lead cables). T his box was also electrically connected to the
metal ground plane.
With regard to the components added to the input power lines,
the 100
μ
F capacitor with its 1
series resistance is required to
achieve system stability when the unit is powered through the
LISNs, as the MIL-ST D-461D standard requires. T hese LISNs
have a series inductance of 50
μ
H at low frequencies, giving a
total differential inductance of 100
μ
H. As explained earlier in
REV. A
the System Instability section, such a large series source induc-
tance will cause an instability as it interacts with the converter’s
negative incremental input resistance unless some corrective
action is taken. T he 100
μ
F capacitor and 1
resistor provide
the stabilization required.
It should be noted that the values of these stabilization compo-
nents are appropriate for a single converter load. If the system
makes use of several converters, the values of the components
will need to be changed slightly, but not such that they are
repeated for every converter. It should also be noted that most
system applications will not have a source inductance as large as
the 100
μ
H built into the LISNs. For those systems, a much
smaller input capacitor could be used.
T he 2
μ
F differential-mode capacitor and the two 82 nF common-
mode capacitors were added to achieve the results shown in the
EMI measurement figures described above.
RE LIABILIT Y CONSIDE RAT IONS
MT BF (Mean T ime Between Failure) is a commonly used
reliability concept that applies to repairable items in which
failed elements are replaced upon failure. T he expression for
MT BF is
MTBF = T/r
where
T
= total operating time
r
= number of failures
In lieu of actual field data, MT BF can be predicted per
MIL -HDBK -217.
MT BF, Failure Rate and Probability of Failure
: A proper
understanding of MT BF begins with its relationship to lambda
(
l
), which is the failure rate. If a constant failure rate is assumed,
then MT BF = 1/
l
, or
l
= 1/MT BF. If a power supply has an
MT BF of 1,000,000 hours, this does not mean it will last
1,000,000 hours before it fails. Instead, the MT BF describes the
failure rate. For 1,000,000 hours MT BF, the failure rate during
any hour is 1/1,000,000, or 0.0001%. T hus, a power supply
with an MT BF of 500,000 hours would have twice the failure
rate (0.0002%) of one with 1,000,000 hours.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADDC02828SA | 28 V/100 W DC/DC Converter with Integral EMI Filter |
| ADDC02828SATV | 28 V/100 W DC/DC Converter with Integral EMI Filter |
| ADDC02828SAKV | JT 7C 7#20 PIN GRND PLUG |
| ADDC02828 | 270V/100W DC/DC Converter with Integral EMI Filter(帶積分EMI濾波器的DC-DC轉(zhuǎn)換器) |
| ADDS-21XX-EZLITE | RIBBON CABLE, RND/FLAT, 50WAY, PER M; Cores, No. of:50; Conductor make-up:7/36AWG; Impedance:75R; Pitch:1.27mm; Voltage rating, AC:300V; Colour:Grey; Approval Bodies:UL, CSA; Area, conductor CSA:0.072mm2; Cable UL style number:UL RoHS Compliant: Yes |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADDC02812DA | 制造商:AD 制造商全稱:Analog Devices 功能描述:28 V/100 W DC/DC Converters with Integral EMI Filter |
| ADDC02812DAKV | 制造商:AD 制造商全稱:Analog Devices 功能描述:28 V/100 W DC/DC Converters with Integral EMI Filter |
| ADDC02812DATV | 制造商:AD 制造商全稱:Analog Devices 功能描述:28 V/100 W DC/DC Converters with Integral EMI Filter |
| ADDC02812DATV/883B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DC-to-DC Voltage Converter |
| ADDC02812DATV/QMLH | 制造商:AD 制造商全稱:Analog Devices 功能描述:28 V/100 W DC/DC Converters with Integral EMI Filter |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。