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参数资料
| 型号： | PSK1212-7B |
| 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 |
| 封装： | METAL, CASE K01, MODULE |
| 文件页数： | 7/18页 |
| 文件大小： | 366K |
| 代理商： | PSK1212-7B |
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Rugged)
REV. FEB. 25 2004
Page 15 of 18
Description of Options
-9
Extended Temperature Range
This option defines an extended operational ambient tem-
perature range of
TA = –40 to 71°C.
P
Potentiometer
Note: Option P is not recommended, if several modules
are operated in parallel connection.
Option P excludes R function. The output voltage
Vo can be
adjusted with a screwdriver in the range 90 - 110%
Vonom.
However, the minimum differential voltage
Vio min be-
tween input and output as specified in
Electrical Input
Data should be maintained.
E
Inrush Current Limitation
Note: This option requires increased minimum input volt-
age of up to 1 V, dependent upon input range. In battery
driven applications the use of option E is essential due to
very low battery impedances.
Inrush current can reach several thousand amperes de-
pending on the source and input line conditions. Immedi-
ately after application of the input supply, the inrush current
is limited by parasitic components of the voltage source
and power supply input only. The power supply input
presents a very low impedance to such currents and when
driven from a low impedance source, for example a
battery, the inrush current can peak at several orders of
magnitude above the continuous DC input current. Option
E dramatically reduces this peak current and is recom-
mended for any application to protect series elements
such as switches or circuit brakers and rectifiers. After
startup, the resistor is bypassed for normal operation.
[A]
t [ms]
40 (typical)
0
100 (typical)
Normal operation
(15
resistor bypassed)
Soft start
Inrush limit
Startup
(I
i = ––––)
Vi
15
11029
Fig. 15
Option E: Inrush current versus time
C
Thyristor Crowbar
Note: The thyristor can be deactivated by removal of the in-
put voltage only. The inhibit signal cannot deactivate the
thyristor.
Option C protects the load against power supply malfunc-
tion. It is not designed to sink external currents.
As a central overvoltage protection device, the crowbar is
usually connected to the external load via distributed in-
ductance of the lines. For this reason, the overvoltage at the
load can temporarily exceed the trigger voltage
Vo c. De-
pending on the application, further decentralized overvolt-
age protection elements may have to be used additionally.
A fixed-value monitoring circuit checks the output voltage
Vo and when the trigger voltage Vo c is reached, the thyristor
crowbar triggers and disables the output.
An external connection C (crowbar trigger control) is pro-
vided. When crowbar option is used with two or more power
supplies in parallel connection, all crowbar trigger terminals
(C) should be interconnected. This ensures all crowbar cir-
cuits triggering simultaneously in order to disable all out-
puts at once. The crowbar trigger voltage is maintained be-
tween Vo+ and Go–. To prevent false triggering, the user
should ensure that
Vo (between Vo+ and Go–) deos not
exceed
Vo c.
Table 13: Crowbar trigger levels
Characteristics
Condition
PSS 129
PSS 249
PSS 369
PSS 489
PSK 1212
PSK 2412
PSK 3612
PSK 4812
min
typ
max
min
typ
max
min
typ
max
min
typ
max
Unit
Vo c
Trigger voltage
TC min - TC max
17.8 18.9
28.89 30.6
47.0 50.0
63.0 67.0
VDC
Vi min - Vi max
14.3 15.2 1
43.0 45.5 1
ts
Delay time
Io = 0 - Io nom
1.5
s
1 Crowbar trigger voltage with option P
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