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參數(shù)資料
| 型號： | PSA361-7IR |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 43.2 W DC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 6/13頁 |
| 文件大?。?/td> | 216K |
| 代理商： | PSA361-7IR |
PSA Series Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. SEP 23, 2003
Page 2 of 13
Type Key and Product Marking
PSA 12 1.5 -7 i R P Y
Positive switching regulator in case A01 .................... PSA
Nominal output voltage in volt ................................ 12...48
Nominal output current in ampere ........................... 1...1.5
Operational ambient temperature range T
A
–25...71°C ........................................................... -7
–40...71°C (option) .............................................. -9
Inhibit input ........................................................................ i
Control input for output voltage adjustment 1 .................. R
Potentiometer 1 (option) ................................................... P
PCB soldering pins 0.5
∞ 1.0 mm (option) ...................... Y
1 R-Control excludes option P and vice versa.
Example:
PSA 121.5-7iPY = A positive switching regulator with a 12 V, 1.5 A output, ambient temperature range of
–25…71°C, inhibit input, potentiometer and small soldering pins.
Control circuit
Go–
Vo+
Gi–
Vi+
Input
Filter
R
i
Io
U o
Ii
U i
03016
Ce
Option P
Fig. 1
Block diagram
Functional Description
The switching regulators are using the buck converter to-
pology. See also: Technical Information: Topologies. 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. Regulation
is accomplished by varying the on to off duty ratio of the
power switch.
These regulators are ideal for a wide range of applica-
tions, where input to output isolation is not necessary, or
where already provided by an external front end (e.g. a
transformer with rectifier). To optimise customer’s needs,
additional options and accessories are available.
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