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参数资料
| 型号： | PSC128-7LIPCD |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 6/13页 |
| 文件大小： | 223K |
| 代理商： | PSC128-7LIPCD |
PSC Series Extended Data Sheet
Positive Switching Regulators (Industrial)
REV. MAY 12, 2004
Page 2 of 13
Part Number Description
PSC 12 8 -7 L i R P C D
Positive switching regulator in case C03 .................... PSC
Nominal output voltage in volt (5A for 5.1 V) ......... 5A - 36
Nominal output current in ampere ............................ 8 - 12
Operational ambient temperature range
T
A
–25 to 71°C ......................................................... -7
–40 to 71°C (option) ............................................ -9
Input filter (option) ............................................................ L
Inhibit input ....................................................................... i
Control input for output voltage adjustment 1 .................. R
Potentiometer 1 (option) ................................................... P
Thyristor crowbar (option) ............................................... C
Input/output voltage monitor (option) ......................... D/D1
1 Feature R excludes option P and vice versa.
Example:
PSC 128-7LiPC = A positive switching regulator with a 12 V, 8 A output, ambient temperature range of
–25 to 71°C, input filter, inhibit input, output adjust potentiometer and thyristor crowbar.
Control circuit
Option P
Go–
Vo+
Gi–
Vi+
Input
Filter
Option
L
G
R
i
D (option)
Io
Vo
I i
Vi
Option C
Fuse1
03018
Option D
Vt
Vo
1 Fuse fitted for option
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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