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參數(shù)資料
| 型號(hào)： | PSC249-2I |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 文件頁(yè)數(shù)： | 2/8頁(yè) |
| 文件大小： | 363K |
| 代理商： | PSC249-2I |
PSC Series
Switching Regulators, PCB & Chassis
Benign Environment
Edition 4/4.99
2/8
MELCHER
The Power Partners.
Type Key
PSC 12 9 -2 iR
Positive switching regulator in case C03 .................... PSC
Nominal output voltage in volt (3E for 3.3 V) .......... 3E...24
Nominal output current in ampere ............................. 9...11
Operational ambient temperature range
T
A
–10...50
°C ........................................................... -2
Option package:
Inhibit input ............................................................ i
Control input for output voltage adjustment ......... R
Example: PSC 129-2iR = A positive switching regulator with a 12 V, 9 A output, ambient temperature range of
–10…50
°C, with options package inhibit input and control input for output voltage adjustment.
Control circuit
Go–
Vo+
Gi–
Vi+
Input
Filter
R (option
package)
i (option
package)
Io
U o
Ii
U i
03014
Ce
G (option
package)
Fig. 1
Block diagram
Functional Description
The switching regulators are designed using the buck con-
verter topology. See also:
Technical Information: Topolo-
gies. The input is not electrically isolated from the output.
During the on period of the switching transistor, current is
transferred to the output and energy is stored in the output
choke in the form of flux. During the off period, this energy
forces the current to continue flowing through the output, to
the load and back through the freewheeling diode. Regula-
tion is accomplished by varying the on to off duty ratio of the
power switch.
These regulators are ideal for a wide range of applications,
where input to output isolation is not necessary, or where
already provided by an external front end (e.g. a trans-
former with rectifier). To optimise customer’s needs, addi-
tional options and accessories are available.
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