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參數(shù)資料
| 型號(hào)： | TXS120ZY-P21V |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 144 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | 2.400 X 3.450 INCH, 0.500 INCH HEIGHT, 3/4 BRICK PACKAGE-14 |
| 文件頁數(shù)： | 13/27頁 |
| 文件大小： | 2635K |
| 代理商： | TXS120ZY-P21V |
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Product Specification
TXS Series: 75…120 A DC-DC Converters
36 to 75 V DC Input, 1.2, 1.5, 1.8, 2.0 and 2.5 V Output, 90 W to 250 W
REV. FEB 18, 2003
20 of 27
www.power-one.com
EMC Specification
The TXS generates EMI noise at the switching
frequency and all it’s harmonics.
There are two types of EMI: conducted and
radiated emissions. Conducted emissions are
currents generated by the converter, propagating
mainly over the input and output wires. Radiated
emission consists on electrical and magnetic fields.
Conducted Noise
Conducted or low frequency noise is measured
between the input lines and protective earth
between 150 kHz and 30 MHz with a measure-
ment receiver. Radiated high frequency noise is
measured as a field between 30 MHz and 1 GHz
with an antenna or with an absorber clamp on the
input/output wires
Measurement set up
A TXS100ZB was selected as a representative unit
for all the EMI measurements. Other models use
similar layouts, have the same mechanical
construction and have similar internal voltages.
The unit was
operated at full load
with
approximately 200 LFM airflow. Additional input
filters were placed as close as possible to the pins.
The output of the converter was wired over 15 inch
(38 cm) cables to a resistive load.
The conducted noise was measured with a 50
LISN (Line Impedance Stabilization Network
according to EN 55022 and CISPR 22 and an
EMC measurement receiver (PMM 8000).
No external filter
The TXS generates predominantly common mode
noise.
Figure 43:
TXS100ZB-N at Ui nom and full load
without an input filter and unearthed
output. Peak measurement Vi (-) line.
Only peak measurements were made. If the peak
values are below the average and the quasi peak
limits, level B is fulfilled in all cases.
One stage input filter
Only a small external filter with few components is
required, to reduce the conducted noise below the
limits of EN 55022 Class B.
Vo (+)
Sense (+)
Trim
Sense (-)
Vo (-)
R Load
U o
Vi (+)
Vi (-)
ON/OFF
6
4
7
8
5
2
3
1
Io
U i
C1, C2: 100 uF/100 V
C3, C3: 2.2 nF Y
L1: 1 mH, Ferrite
Ii
+
C3
C4
C2
C1
L1
Figure 44: TXS with a one stage input filter.
C1, C2 = 100 uF/100 V (Rubycon YXA), C3,
C4 = 2.2 n/250 V (Wima MP3-Y). L1 = 1 mH; Ferrite
i = 10’000, 16 turns (B64290L658 T38 Epcos)
Figure 45: TXS100ZB-N with one stage input filter
according to Figure 44.
Peak measurement in the Vi (-) line.
Two stage input filter
The following circuit combines two common mode
filter stages.
Vo (+)
Sense (+)
Trim
Sense (-)
Vo (-)
R Load
U o
Vi (+)
Vi (-)
ON/OFF
6
4
7
8
5
2
3
1
I o
U i
C1, C2: 100 uF/100 V
C3, C3: 2.2 nF Y
L1: 1 mH, Ferrite
L2: 7.5uH, MPP
I i
+
C2
C1
L1
L2
C4
C3
Figure 46: TXS100ZB-N with a two stage input filter:
C1, C2 = 100 uF/100 V (Rubycon YXA), C3, C4 =
2.2 n/250 V (Wima MP3-Y). L1 = 1 mH; Ferrite
I =10’000, 16 turns
(B64290L658 T38 Epcos),
L2 = 7.5 uH, 125 u MPP Powder core (Magnetics
55050-A2)
F
Quasi Peak limit EN55011/22
Average limit
Measured noise
Peak
150 kHz
1MHz
10 MHz
30 MHz
60 dBuV
50 dBuV
40 dBuV
30 dBuV
20 dBuV
10 dBuV
0 dBuV
80 dBuV
70 dBuV
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