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參數(shù)資料
| 型號： | CSR2012-6R |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 20 W DC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 5/11頁 |
| 文件大小： | 394K |
| 代理商： | CSR2012-6R |
Industrial Environment
DC-DC Converters <40 Watt
SR Series
Edition 4/6.99
3/11
MELCHER
The Power Partners.
Functional Description
After passing through a line interference filter, the DC volt-
age is chopped at a constant frequency of about 30 kHz.
After transformer isolation and rectification, an output filter
reduces ripple to a minimum without compromising the dy-
namic behaviour. The output voltage is routed to a control
circuit with internal sense lines, where the output voltage is
compared with a reference voltage. The voltage is regulated
via a control transformer by varying the duty ratio of the for-
ward converter.
The converters have input transient protection by means of
a zinc oxide VDR and input reverse polarity protection by
means of a protective diode and a fuse.
An internal inhibit signal keeps the output voltage switched
off below approx. 0.7...0.9
Ui min.
The outputs are protected against continuous open circuit
by means of an internal, electronically switched pre-load
and against continuous short circuit by the current limiting
circuit.
No output voltage overshoot will occur when plugging in or
disconnecting the module, switching the input voltage on/
off, inhibiting the unit or after reset.
In the event of a main control circuit failure, the maximum
output voltage
Uo is restricted to approx. 1.2 Uo nom by
means of an independent second control circuit.
When the converters are located in free, stationary air at
a temperature
TA max = 71
°C and are operated at nominal
power, the case temperature
TC max will reach approx. 85
°C
after a certain warm-up time (Case temperature
TC at the
measuring point, see:
Mechanical Data).
Under certain operating conditions the ambient tempera-
ture
TA max may be allowed to exceed 71
°C provided that
additional measures are taken to ensure the case tempera-
ture
TC max remains below 85
°C.
Forward
converter
30 kHz
Control circuit
P (option)
i (option)
+
–
4.7 nF
2.2 nF
+
–
( )
Input
Filter
2.2 nF
03051
Fig. 1
Block diagram
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