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参数资料
| 型号： | 20MX15-12-12-8RI |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT 15.6 W DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 17/20页 |
| 文件大小： | 319K |
| 代理商： | 20MX15-12-12-8RI |
Board Mountable
DC-DC Converters
IMX/IMY 15 Series
Edition 7/5.2000
6/20
Inrush current
The inrush current has been kept as low as possible by
choosing a very small input capacitance. A series resistor
may be installed in the input line to further reduce this cur-
rent.
I [A]
t [
s]
04022
0
10
20
30
40
50
60
70
80
90 100
4
3
2
1
Fig. 6
Typical inrush current at Ui nom, Po nom versus time
(40 IMX 15). Source impedance according to
prETS 300132-2, version 4.3 at Ui nom.
Fig. 7
Converter start-up and rise time
Uo nom
Uo
tstart up
trise
t
04008
Input Undervoltage Lockout
A special feature of these units is the accurate undervoltage
lockout protection which protects the units (and system)
from large currents caused by operation at low voltages.
This ensures easier start-up in distributed power systems.
Table 3: Turn on and turn off voltage
Type
Turn On
Turn Off
Units
20 IMX
7.5...8
7...7.5
V
40 IMX
12.5...13.5
12...13
110 IMY
40...42.5
38...40.5
Input Transient Voltage Protection
A built-in suppressor diode provides effective protection
against input transients which may be caused for example
by short-circuits accross the input lines where the network
inductance may cause high energy pulses.
Table 5: Built-in transient voltage suppressor
Type
Breakdown
Peak power
Peak pulse
voltage
at 1 ms
current
VBr nom [V]
Pp [W]
Ipp [A]
20 IMX 15
40
1500
22
40 IMX 15
100
1500
9.7
110 IMY 15
168
600
0.5
For very high energy transients as for example to achieve
IEC/EN 61000-4-5 or ETR 283 (19 Pfl1) compliance (as per
table:
Electromagnetic Immunity) an external inductor and
capacitor are required. The components should have simi-
lar characteristics as listed in table:
Components for exter-
nal circuitry for IEC/EN 61000-4-5, level 2 or ETR 283
(19Pfl1) compliance.
Note: The suppressor diode D is only necessary for
20 IMX 15 types.
Table 6: Components for external circuitry for IEC/EN
61000-4-5, level 2 or ETR 283 (19Pfl1) compliance.
Type
Inductor (L)
Capacitor (C)
Diode (D)
20 IMX
68
H, 2.7 A
330
F, 63 V
1.5 k E47A
40 IMX
220
H, 1.3 A
2
× 100 F, 100 V
-
110 IMY
330
H, 0.43 A
2
× 100 F, 200 V
-
Vi+
Vi–
C
L
D
+
04036
Fig. 8
Example for external circuitry to comply with IEC/EN
61000-4-5 or ETR 283 (19Pfl1); the diode D is only neces-
sary for 20 IMX 15 types.
Reverse Polarity Protection
The built-in suppressor diode also provides for reverse po-
larity protection at the input by conducting current in the re-
verse direction. An external fuse is required to limit this cur-
rent.
Table 4: Recommended external fuses
Converter type
Fuse type
20 IMX 15
F4.0A
40 IMX 15
F2.0A
110 IMY 15
F1.0A
10
5
10
04051
Fig. 9
Dimensions of inductor L for 110 IMY 15 types
(e.g. TOKO 494LYF-0098K).
22
23.8
11.5
04052
Fig. 10
Dimensions of inductor L for 20 IMX 15 and 40 IMX 15
types (e.g. Coil Craft, PCH-45 series).
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