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参数资料
| 型号： | PSK3E20-7EPCB1 |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 18/19页 |
| 文件大小： | 370K |
| 代理商： | PSK3E20-7EPCB1 |
PSS, PSK Extended Data Sheet
Positive Switching Regulator (Industrial)
REV. FEB 25, 2004
Page 8 of 19
Auxiliary Functions
S
Sense Lines
Note: Sense lines should always be connected! It is rec-
ommended to connect the sense lines directly at the female
connector. See also:
Technical Information.
This feature enables compensation of voltage drop across
the connector contacts and the load lines. In case the sense
lines are connected at the load rather than directly at the
connector, the user must ensure that
Vo max (between Vo+
and Go–) is not exceeded.
Applying generously dimensioned cross-section load leads
avoids troublesome voltage drop. To minimize noise pick-up
wire sense lines in parallel or twisted.
To ensure correct operation, both sense lines must be con-
nected to their respective power output potential. The volt-
age difference between any sense line and its respective
power output pin (as measured on the connector) should
not exceed the values given in the following table.
i Inhibit (Remote On / Off)
Note: With open i input, output is enabled (
Vo = on)
The inhibit input allows the switching regulator output to be
disabled via a control signal. In systems with several units,
this feature can be used, for example, to control the activa-
tion sequence of the regulators by a logic signal (TTL, C-
MOS, etc.). An output voltage overshoot will not occur
when switching on or off. The inhibit characteristics are ref-
erenced to the S– remote sense terminal.
Table 4: Maximum allowed voltage compensation
Nominal output
Total voltage difference Voltage difference
voltage
between both sense lines
between
and their respective output
Go– and S–
3.3, 5.1 V
<0.5 V
<0.25 V
12, 15, 24, 36 V
<1.0 V
<0.25 V
Fig. 5
Sense lines connection
Vi+
i
R
CS
Gi–
Vo+
S+
S–
Go –
Load
06046
Vi+
Gi–
S–
i
S+
Iinh
Vinh
06047
Fig. 7
Definition of Iinh and Vinh
Table 5: Inhibit characteristics
Characteristics
Conditions
min typ max
Unit
Vinh
Inhibit input voltage to keep
Vo = on
Vi min - Vi max
–50
+0.8
V DC
regulator output voltage -
Vo = off
TC min - TC max
+2.4
+50
t r
Switch-on time after inhibit command
Vi = Vi nom
130
ms
t f
Switch-off time after inhibit command
RL = Vo nom /Io nom
25
Ii inh
Input current when inhibited
Vi = Vi nom
25
mA
0
t
0
Inhibit
1
0.1
1
Vo/Vo nom
tr
tf
06001
Fig. 8
Output response as a function of inhibit signal
Fig. 6
Typical inhibit current Iinh versus inhibit voltage Vinh
4
2
0
–50 –40
20
40
–30
0
–20 –10
10
30
50
5
3
1
I
inh [mA]
V
inh [V]
V
o on
V
o off
V
inh
=
0.8
V
inh
=
2.4
V
06034
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