参数资料
| 型号： | PSK5A25-7 |
| 厂商： | Power-One |
| 文件页数： | 18/20页 |
| 文件大小： | 0K |
| 描述： | SWITCHING REGULATOR 127.5W 5.1V |
| 标准包装： | 1 |
| 系列： | * |
PSK, PSS Series Data Sheet
?
Positive Switching Regulators
Description of Options
? [A]
11029a
( I i = –– R V –– )
-7 Temperature Range
This option defines a restricted temperature range as
specified in table 10 (not for new designs).
Inrush limit
i
s
Soft start
Normal operation
( R s bypassed)
P Potentiometer to Adjust the Output
Note: Option P is not recommended, if several regulators are
operated in parallel connection.
Option P excludes R function; the R-input (pin 16) should be
0
40 (typical)
100 (typical)
ms
t
left open-circuit. The output voltage V o can be adjusted in the
range 90 – 110% of V o nom .
However, the minimum differential voltage V i max between input
and output as specified in Electrical Input Data should be
maintained.
E Inrush Current Limitation
Note: This option requires an increased minimum input voltage
V i max of up to 1 V, dependent upon input range.
In regulators without option E, after application of the input
supply the inrush current is limited by parasitic components of
the voltage source and the regulator input only. The regulator
input exhibits a very low impedance, 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 input current.
Option E dramatically reduces this peak current and is
recommended for any application to protect series elements
such as fuses, switches, or circuit brakers. The start-up circuit
is bypassed during normal operation.
C Thyristor Crowbar
Note : The crowbar can be reset by removal of the input voltage
only. The inhibit signal cannot deactivate the thyristor.
Option C protects the load against power supply malfunction. 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
inductance of the lines. For this reason, the overvoltage at the
load can temporarily exceed the trigger voltage V o c .
Table 13: Crowbar trigger levels
Fig. 16
Option E: Inrush current versus time. R s is the startup
resistor (R s = 1 ? for models with V i max ≤ 80 V, R s = 15 ? for
models with V i max > 80 V)
Depending on the application, further decentralized over-
voltage protection elements may have to be used additionally.
A fixed-value monitoring circuit checks the output voltage V o ,
and when the trigger voltage V o c is reached, the thyristor
crowbar triggers and disables the output.
An external connection C (crowbar trigger control) is provided.
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 circuits triggering
simultaneously, in order to disable all outputs at once. The
crowbar trigger voltage is maintained between Vo+ and Go –.
To prevent false triggering, the user should ensure that V o
(between Vo+ and Go –) deos not exceed V o c .
G RoHS Compliance
Models with G are RoHS-compliant for all six substances.
Characteristics
Conditions
PSK5A16
PSK1212
PSS249
PSK3612
PSK4812
Unit
PSK5A20
PSK5A25
PSK1216
PSK1220
PSK2412
PSK2416
PSK3616
PSK3620
PSK2420
min typ max min
typ
max min
typ max
min
typ max
min typ max
V o c Trigger voltage T C min – T C max
6.3
6.7
17.8 18.9
28.89 30.6
47 50
63
67
V
V i min – V i max
14.3 1 15.2 1
43 1 45.5 1
t s
Delay time
I o = 0 – I o nom
1.5
1.5
1.5
1.5
1.5
μs
1
Models with option P
BCD20029-G Rev AB, 12-Aug-2013
MELCHER
The Power Partners.
Page 18 of 20
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