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參數資料
| 型號： | PSK1218-2B |
| 廠商： | POWER-ONE INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封裝： | METAL, CASE K01, MODULE |
| 文件頁數： | 12/15頁 |
| 文件大?。?/td> | 311K |
| 代理商： | PSK1218-2B |
PSS, PSK Extended Data Sheet
Positive Switching Regulators (Benign)
REV. FEB 15, 2004
Page 6 of 15
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
VDC
regulator output voltage...
Vo = off
TC min – TC max
+2.4
+50
t r
Switch-on time after inhibit command
Vi = Vi nom
100
ms
t f
Switch-off time after inhibit command
RL = Vo nom /Io nom
5
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
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 refer-
enced to the S– remote sense terminal.
Vi+
Gi–
S–
i
S+
Iinh
Vinh
06047
Fig. 7
Definition of Iinh and Vinh
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
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– set at R control input) 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.
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–
5.1 V
<0.5 V
<0.25 V
12, 15, 24 V
<1.0 V
<0.25 V
Fig. 5
Sense lines connection
Vi+
i
R
CS
Gi–
Vo+
S+
S–
Go –
Load
06046
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