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参数资料
| 型号： | 40IMX4-0505-9 |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT 3.5 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | 8.5 MM, DIP-24 |
| 文件页数： | 7/12页 |
| 文件大小： | 180K |
| 代理商： | 40IMX4-0505-9 |
REV. AUG 05, 2004
Page 4 of 12
www.power-one.com
IMX4 DC-DC Series Data Sheet
4-Watt DC-DC Converters
Table 3: Input filter components (EN 55022)
Ref.
20IMX4
40IMX4
70IMX4
C1
4.7
F, 63 V,
2.2
F, 100V,
2.2
F, 150V,
85°C
Type
ceramic or film
Electrical Input Data
General conditions:
TA = 25°C, unless TC is specified.
Table 2: Input Data
Input
20IMX4
40IMX4
70IMX4
Characteristics
Conditions
min typ max min typ max min typ max
Unit
Vi
Input voltage range
TC min to TC max
8.4
36
16.8 4
75
40
121
V DC
Vi nom
Nominal input voltage
Io = 0 to Io nom
20
40
70
Vi sur
Repetitive surge voltage
abs. max input (3 s)
40
100
150
tstart up
Converter start-up time 1
Worst case condition at
0.25 0.5
s
Vi min and full load
trise
Rise time 1
Vi nom
resistive load
5
ms
Io nom
capacitive load
12
Ii o
No load input current
Io = 0, Vi min to Vi max
15
20
5
10
5
10
mA
C i
Input capacitance
for surge calculation
0.54
0.3
0.15
F
Iinr p
Inrush peak current
Vi = Vi nom 3
3.7
4.2
5.6
A
fs
Switching frequency
Vi min to Vi max, Io = 0 to Io nom
approx. 400
kHz
Ii rr
Reflected ripple current
Io = 0 to Io nom
100
60
30
mApp
ui RFI
Input RFI level
EN 55022 2
B 1
A
conducted and radiated
1 Measured with a resistive or max. admissible capacitive load. (See fig.: Converter start-up and rise time)
2 External filter required. (See: Filter recommendations for compliance with EN 55022)
3 Source impedance according to prETS 300132-2, version 4.3.
4 Operation at lower input voltage possible: Po approx. 80% of Po nom at Vi min = 14.4 V
Fig. 5
Converter start-up and rise time
1 A/Div.
5
s/Div.
04034
0
1
2
3
4
Inrush Current
The inrush current has been kept as low as possible by
choosing a very small input capacitance. A series resistor
may be inserted in the input line to limit this current further.
Fig. 6
Typical inrush current at Vi nom, Po nom versus time
(40IMX4) measured according to prETS 300132-2,
version 4.3.
Reverse Polarity Protection at Input
The suppressor diode on the input also provides for
reverse polarity protection by conducting current in the
reverse direction, thus protecting the unit. An external fuse
is required to limit this current:
– For 20IMX4 a fast 1 A (F1A) fuse is recommended
– For 40IMX4 a fast 0.63 A (F0.63A) fuse is recommended
– For 70IMX4 a fast 0.35 A (F035A) fuse is recommended
Filter recommendations for compliance with EN55022
Electromagnetic emission requirements according to table
Input data can be achieved by adding an external capacitor
as close as possible to the input terminals.
Fig. 7
Input filter arrangement
Vi+
Vi–
Ci
04035
Vo nom
Vo
tstart up
trise
t
04008
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