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| 型號(hào)： | CM3020-7PD1AHFU |
| 廠(chǎng)商： | POWER-ONE INC |
| 元件分類(lèi)： | 電源模塊 |
| 英文描述： | 3-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封裝： | 168.50 X 111.20 MM, 38.70 MM HEIGHT, METAL, CASE M02, MODULE |
| 文件頁(yè)數(shù)： | 8/24頁(yè) |
| 文件大小： | 536K |
| 代理商： | CM3020-7PD1AHFU |
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Rugged Environment
DC-DC Converters <100 W
M-Family
Edition 2/96 - Melcher AG
7 - 17
MELCHER
The Power Partners.
7.1
Fig. 16
Typical inrush current waveform of a LM type
Fig. 15
Typical inrush current waveforms of a CM and an EM type
12
10
8
6
4
2
0
10
20
30
40
t [ms]
Ii [A]
t inr
CM type
Ui = 110 V DC
Po = Po nom
EM type
Ui = 110 V DC
Po = Po nom
Iinr p = Ui / (RS+RI)
Capacitor
Ci
fully charged
Normal operation
(FET fully conducting)
Ii = Po /Ui η
6
Ii [A]
4
2
0
-2
-4
-6
0
20
40
60
80
t [ms]
tinr
LM type
Ui = 230 V AC
Po = Po nom
Capacitor
Ci
fully charged
Normal operation
(FET fully conducting)
Precautions:
In order to avoid overload of the series resistor RI the on/off
switching cycle should be limited to 12 s if switched on/off
continuously. There should not be more than 10 start-up
cycles within 20 s at a case temperature of 25
°C.
If CM and CMZ types are driven by input voltages below
35 V DC or LM and LMZ types below 100 V AC, the maxi-
mum case temperature should be derated by 10 K or the to-
tal output power should be derated by 20%. EM, LM and
LMZ units driven by DC input voltages do not need to be
derated within the full specified input voltage range.
Availability:
Option E is available for C/E/LM and CMZ/LMZ modules
with a nominal output power of 51 W maximum.
Input
Filter
Control
Converter
FET
Ci
RI
RS
Rectifier
(LM/LMZ types)
Fig. 14
Option E block diagram
Table 18: Inrush current characteristics with option E
Characteristic
CM/CMZ
EM
LM/LMZ
Unit
CM/CMZ/EM at
Ui = 110 V DC
LM/LMZ at
Ui = 230 VAC
typ
max
typ
max
typ
max
Iinr p
Peak inrush current
6.5
8
2.2
4
6
10
A
tinr
Inrush current duration
22
30
19
30
35
50
ms
Option E Extended inrush current limitation
Available for C/E/LM and C/LMZ types.
The standard version of the modules C/D/E/LM as well as
C/D/LMZ include a passive inrush current limitation in the
form of a NTC resistor.
For applications which require an extended inrush current
limitation, an active electronic circuit as shown in "Option E
block diagram" has been developed. Typical inrush current
waveforms of units equipped with this option are shown
below.
CM and CMZ units meet the CEPT/ETSI standards for
48 V DC supply voltage according to prETS 300132-2 if fit-
ted with option E combined with option D6 (input voltage
monitoring). Option D6, externally adjustable via poten-
tiometer, is necessary to disable the converter at input volt-
ages below the actual service ranges, avoiding an exces-
sive input current when the input voltage is raised slowly
according to prETS 300132-2. Option D6 threshold level
Uti
+
Uhi (refer to description of option D) should be adjusted
to 36.0...40.5 V for 48 V DC nominal supply voltage (for 60
V DC systems, threshold should be set to 44.0...50.0 V
DC). The D output (pin 5) should be connected to the inhibit
(pin 2). For applications where potentiometers are not al-
lowed refer to option D9.
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