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參數(shù)資料
| 型號(hào)： | FM1901-9RF |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 50 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | METAL, CASE M02, MODULE |
| 文件頁數(shù)： | 25/25頁 |
| 文件大小： | 569K |
| 代理商： | FM1901-9RF |
Cassette Style
DC-DC Converters
M Series
Edition 01/01.2001
9/25
Hold-up Time and Output Response
When the input voltage is switched off, the output voltage
will remain high for a certain hold-up time
th (see fig.: Output
response as a function of input voltage or inhibit control) be-
fore the output voltage falls below 0.95
Uo nom. To achieve
the hold-up times indicated in fig.:
Typical hold-up time th
versus relative input voltage at Io nom, AM, BM, CM, DM, FM
and CMZ, DMZ modules require an external series diode in
the input path. This is necessary to prevent the discharge of
the input capacitor through the source impedance or other
circuits connected to the same source. EM, LM and LMZ
modules have a built-in series diode. In AM, BM, CM, DM,
FM and CMZ, DMZ modules, no series diode is built-in,
since it would generate up to 10 W of additional power loss
inside the converter. Consequently the maximum opera-
tional ambient temperature would have to be reduced ac-
cordingly.
Note: For additional hold-up time see also
Description of
Options: V ACFAIL Signal (VME).
The behavior of the outputs is similar with either the input
voltage applied or the inhibit switched low.
An output voltage overshoot will not occur when the module
is turned on or off.
Fig. 7
Output response as a function of input voltage (on/off
switching) or inhibit control
Fig. 8
Typical hold-up time th versus relative input voltage at Io nom
2
345
6
1
0.10
1.00
1000.00
Ui DC
______
Ui min DC
th [ms]
10.00
100.00
LM/LMZ
EM
CM/DM
CMZ/DMZ
AM/BM/FM
05024
0
t r
t f
t
0
Inhibit
1
Output
0.1
Uo nom
t
0
1
0.95Uo nom
t h
Ui
05025
Output Current Allocation for Special Types
Output currents differing from those given for standard
types (as per:
Type Survey and Key Data) can be provided.
A maximum output power of 50 W should be considered, if
an ambient temperature range of –25...71
°C is required.
The maximum permissible output currents are indicated in
the table below. If (upon customer's request) output volta-
ges are different from standard values, the relevant output
currents have to be adapted accordingly.
With reduced maximum ambient temperature or with forced
cooling, the total output power may exceed 50 W. Custom-
ized configurations always need to be checked by a feasibil-
ity study first. Please ask Power-One's sales engineers for
a proposal appropriate to your specific needs. See also:
Commercial Information: Inquiry Form for Customized
Power Supply.
Table 5: Current allocation with special types
Output voltage
Output 1
Output 2
Output 3
Temperature
all types
A...LM 2000
A...LM 3000
Uo1/2/3 nom [V]
Io1 max [A]
Io2 max [A]
Io3 max [A]
TA [°C]
TC [°C]
5.1
8.0
4.0
1.8 (2.5 1)1.5
–25...71
–25...95
12
4.0
2.0
1.5
1.2
15
3.4
1.7
1.2
1.0
24
2.0
1.0
0.7
0.5
2
5.1
10.0
4.5
2.1 (2.8 1)1.8
–25...60
–25...90
12
5.0
2.5
1.7
1.5
15
4.0
2.0
1.5
1.3
24
2.5
1.3
0.9
0.7
5.1
11.0
5.0
2.4 (3.0 1)2.0
–25...50
–25...85
12
6.0
3.0
2.0
1.7
15
4.6
2.3
1.7
1.5
24
3.0
1.5
1.0
0.8
1 Special high current components required. 2 Ui min has to be increased.
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