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參數(shù)資料
| 型號： | 48IMS7-05-05-7M |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 2-OUTPUT 7 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | 2 INCH X 1.600 INCH, 10.50 MM HEIGHT, PACKAGE-9 |
| 文件頁數(shù)： | 11/15頁 |
| 文件大?。?/td> | 320K |
| 代理商： | 48IMS7-05-05-7M |
Industrial Environment
DC-DC Converters <40 Watt
IMS 7 Series
Edition 5/9.99
5/15
MELCHER
The Power Partners.
Input Transient Voltage Protection
In many applications transient voltages on the input of the
converter are always possible. These may be caused for ex-
ample be short circuits between Vi+ and Vi– where the net-
work inductance may cause high energy pulses.
In order to protect the converter a large transient voltage
supressor has been fitted to the input of the IMS 7 types.
Specifications as per table below.
Reverse Polarity Protection at Input
The suppressor diode on the input also provides for reverse
polarity protection by conducting current in the reverse di-
rection, thus protecting the unit. An external fuse is required
to limit this current:
– For 24 IMS 7 a fast 2 A (F2A) fuse is recommended.
– For 48 IMS 7 a fast 1 A (F1A) fuse is recommended.
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. 7
Dimensions for inductor L
Table 3: Built-in transient voltage suppressor
Type
Breakdown
Peak Power
Peak Pulse
Voltage
at 1 ms
Current
VBR nom
PP
IPP
24 IMS 7
53 V
600 W
7.7 A
48 IMS 7
100 V
600 W
4.1 A
Vi+
Vi–
C
L
V+
V–
Module
+
04043
i
11.5
5
10.5
5
0.7
04029
Fig. 6
Example for external circuitry to comply with
IEC/EN 61000-4-5, level 2.
If transients generating currents above the peak pulse cur-
rent
Ipp are possible then an external limiting network such
as the circuit recommended for IEC 801-5, level 2 compli-
ance is necessary.
To achieve IEC/EN 61000-4-5, level 2 compliance an addi-
tional inductor and capacitor should be provided externally
as shown in the figure below. The components should have
similar characteristics as listed in table 9.
To withstand the 150 V transient according to 19 Pfl 1, appli-
cable for 48 IMS 7 types, the same external circuitry with
similar components as for IEC/EN 61000-4-5, level 2 com-
pliance can be used.
Table 4: Components for external circuitry to comply with
IEC 801-5
Circuit Ref.
24 IMS 7
48 IMS 7
L
330
H, 0.42 , 0.6 A
330
H, 0.42 , 0.6 A
TDK TSL1110-331KR55 TDK TSL1110-331KR55
C
68
, 63 V, 85°C
68
F, 100 V, 85°C
1 A/Div.
10
s/Div.
04030
0
1
2
3
4
Fig. 8
Typical inrush current at Ui nom, Po nom versus time
(48 IMS 7) measured according to prETS 300132-2 (Ver-
sion 4.3)
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