K Series Data Sheet
150 Watt DC-DC and AC-DC Converters
06001
Vo/Vo nom
1
Auxiliary Functions
i Inhibit for Remote On and Off
Note: With open i input the output is disabled.
0.1
t
t
0
The outputs may be enabled or disabled by means of a logic
signal (TTL, CMOS, etc.) applied between the inhibit input i and
the negative pin of output 1 (Vo1–). In systems with several
models, this feature can be used to control the activation
sequence of the converters. If the inhibit function is not required,
connect the inhibit pin 18 to pin 14 to enable the outputs (active
low logic, fail safe).
tf
tr
Inhibit
1
0
Fig. 15
Typical output response as a function of inhibit control
06031
Sense Lines
Vo+
i
Vi+
(Only single output models)
Iinh
Important: Sense lines must always be connected! Incorrectly connected
sense lines may activate the overvoltage protection, resulting in a
permanent short-circuit of the output.
Vinh
This feature allows for compensation of voltage drops across the
connector contacts and if necessary, across the load lines. If the
sense lines are connected at the load rather than directly at the
connector, the user should ensure that the voltage differences
specified in the table below are not exceeded. We recommend
connecting the sense lines directly at the female connector.
Vo–
Vi–
Fig. 13
Definition of V
and I
.
inh
inh
Table 5: Inhibit characteristics
To ensure correct operation, both sense lines (S+ and S–) should
be connected to their respective power outputs (Vo1+ and Vo1–)
and the voltage difference between any sense line and its
respective power output pin (as measured on the connector)
should not exceed the following values:
Characteristic
Conditions
min typ max Unit
V
Inhibit
voltage
V
V
= on
= off
V
- V
i max
–50
2.4
0.8
50
V
i min
inh
o
o
I
Inhibit current
Rise time
Vinh = 0
–400 µA
ms
inh
t
30
depending on I
r
f
Table 6: Maximum voltage compensation allowed using
sense lines
t
Fall time
o
I
inh [mA]
Output
voltage
Total voltage difference Voltage difference
Vinh = 2.4 V
Vinh = 0.8 V
between sense lines and
their respective outputs
between
Vo– and S–
2.0
1.6
1.2
5.1 V
< 0.5 V
< 1.0 V
< 0.25 V
< 0.25 V
12, 15, 24 V
0.8
0.4
If the output voltages are increased above Vo nom via the R-input
Vo = on
Vo = off
control, option P setting, remote sensing or option T, the output
currents must be reduced accordingly so that Po nom is not
0
exceeded.
–0.4
–0.8
Vinh [V]
–50
–30
–10
0
10
30
50
Fig. 14
Typical inhibit current I
versus inhibit voltage V
inh
inh
APR 26, 2006 revised to MAY 15, 2006
Page 12 of 34
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