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参数资料
| 型号： | PSB243-9LIR |
| 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： | 4/13页 |
| 文件大小： | 221K |
| 代理商： | PSB243-9LIR |
PSB Series Extended Data Sheet
Positive Switching Regulators (Rugged)
REV. OCT 17, 2003
Page 12 of 13
Table 10: Crowbar trigger levels
Characteristics
Conditions
5.1 V
12 V
15 V
24 V
36 V
48 V
Unit
min
max
min
max
min max
min
max
min
max
min
max
Vo c
Trigger voltage
Vi min - Vi max
5.8
6.8
13.5
16
16.5
19
27
31
40
45.5
55
60
V
Io = 0 - Io nom
t s
Delay time
TC min - TC max
1.5
s
Description of Options
-9
Extended Temperature Range
The operational ambient temperature range is extended
to
TA = –40 to 71°C. (TC = –40 to 95°C, TS = –55 to 100°C.)
P
Potentiometer
Option P excludes R-function. The output voltage
Vo can
be adjusted with a screwdriver in the range from 92 -
108%
Vo nom.
However, the minimum differential voltage
DVi o min be-
tween input and output voltages as specified in:
Electrical
Input Data should be maintained.
C
Thyristor Crowbar
This option is recommended to protect the load against
power supply malfunction, but it is not designed to sink ex-
ternal currents.
A fixed-value monitoring circuit checks the output voltage
Vo. When the trigger voltage Vo c is reached, the thyristor
crowbar triggers and disables the output. It may be deacti-
vated by removal of the input voltage. In case of a switch-
ing transistor defect, an internal fuse prevents excessive
current.
Note: As a central overvoltage protection device, the
crowbar is usually connected to the external load via dis-
tributed inductance of the lines. For this reason, the over-
voltage at the load can temporarily exceed the trigger volt-
age
Voc. Depending on the application, further decentral-
ized overvoltage protection elements may have to be used
additionally. For further information see:
Technical Infor-
mation: Application Notes.
L
Input Filter
Option L is recommended to reduce superimposed inter-
ference voltages and to prevent oscillations, if input lines
exceed approx. 5 m in total length. The fundamental wave
(approx. 120 kHz) of the reduced interference voltage be-
tween Vi+ and Gi– has, with an input line inductance of
5 H, a maximum magnitude of 80 mVrms. A reduction can
be achieved by insertion of a capacitor across the input
(e.g. plastic foil between Vi+ and Gi–).
The input impedance of the switching regulator at 120
kHz is about 17
. The harmonics are small in comparison
with the fundamental wave. See also:
Electrical Input
Data: RFI.
With option L, the maximum permissible additionally su-
perimposed ripple
ui of the input voltage (rectifier mode) at
a specified input frequency
f i has the following values:
ui max = 10 Vpp at 100 Hz or Vpp = 1000 Hz/f i 1V
Accessories
A variety of electrical and mechanical accessories are
available including:
– PCB-tags and isolation pads for easy and safe PCB-
mounting.
– Ring core chockes for ripple and interference reduction.
For more detailed information please refer to:
Accessory
Products on the Power-One homepage.
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