參數(shù)資料
型號(hào)： JC100B
廠商： Electronic Theatre Controls, Inc.
英文描述： JC050B
中文描述： JC050B
文件頁(yè)數(shù)： 9/16頁(yè)
文件大?。?/td> 711K
代理商： JC100B
Tyco Electronics Corp.
9
Data Sheet
October 1997
18 Vdc to 36 Vdc Input, 12 Vdc Output; 50 W to 100 W
JC050B, JC075B, JC100B Power Modules: dc-dc Converters;
Feature Descriptions
(continued)
Remote On/Off
(continued)
8-720 (C).c
Figure 14. Remote On/Off Implementation
Remote Sense
Remote sense minimizes the effects of distribution
losses by regulating the voltage at the remote-sense
connections. The voltage between the remote-sense
pins and the output terminals must not exceed the out-
put voltage sense range given in the Feature Specifica-
tions table, i.e.:
[V
O
(+) – V
O
(–)] – [SENSE(+) – SENSE(–)]
≤
1.2 V
The voltage between the V
O
(+) and V
O
(–) terminals
must not exceed 5.9 V. This limit includes any increase
in voltage due to remote-sense compensation and out-
put voltage set-point adjustment (trim), see Figure 15.
If not using the remote-sense feature to regulate the
output at the point of load, then connect SENSE(+) to
V
O
(+) and SENSE(-) to V
O
(-) at the module.
8-651 (C).h
Figure 15. Effective Circuit Configuration for
Single-Module Remote-Sense Operation
Output Voltage Set-Point Adjustment
(Trim)
Output voltage trim allows the user to increase or
decrease the output voltage set point of a module. This
is accomplished by connecting an external resistor
between the TRIM pin and either the SENSE(+) or
SENSE(–) pins. With an external resistor between the
TRIM and SENSE(–) pins (R
adj-down
), the output voltage
set point (V
o, adj
) decreases (see Figure 16). The follow-
ing equation determines the required external-resistor
value to obtain a percentage output voltage change of
%.
%
The test results for this configuration are displayed in
Figure 17. This figure applies to all output voltages.
With an external resistor connected between the TRIM
and SENSE(+) pins (R
adj-up
), the output voltage set
point (V
O, adj
) increases (see Figure 18).
The following equation determines the required exter-
nal-resistor value to obtain a percentage output voltage
change of
%.
The test results for this configuration are displayed in
Figure 19.
The voltage between the V
O
(+) and V
O
(–) terminals
must not exceed 5.9 V. This limit includes any increase
in voltage due to remote-sense compensation and out-
put voltage set-point adjustment (trim). See Figure 15.
If not using the trim feature, leave the TRIM pin open.
8-748 (C).c
Figure 16. Circuit Configuration to Decrease
Output Voltage
SENSE(+)
V
O
(+)
SENSE(–)
V
O
(–)
V
I
(–)
+
I
on/off
ON/OFF
V
I
(+)
LOAD
V
on/off
V
O
(+)
SENSE(+)
SENSE(–)
V
O
(–)
V
I
(+)
V
I
(–)
I
O
LOAD
CONTACT AND
SUPPLY
I
I
RCONTACT
R
adj
-
down
100
2
–
k
=
R
adj
-
up
O
100
(
1.225
%
%
+
)
V
-100
2
%
%
+
(
)
–
k
=
V
I
(+)
V
I
(–)
ON/OFF
CASE
V
O
(+)
V
O
(–)
SENSE(+)
TRIM
SENSE(–)
R
adj-down
R
LOAD
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