JW075B5 Lineage Power, JW075B5 Datasheet - Page 9

• Manufacturer Part Number: JW075B5
• Manufacturer: Lineage Power

Data Sheet
April 2008
Feature Descriptions
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.:
For JW075A5 and JW075B5, the voltage between the
V
mum output overvoltage clamp voltage as indicated in
the Feature Specifications table. For the JW075C5, the
voltage between the V
not exceed 15.5 V. This limit includes any increase in
voltage due to remote-sense compensation and output
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
Although the output voltage can be increased by both
the remote sense and by the trim, the maximum
increase for the output voltage is not the sum of both.
The maximum increase is the larger of either the
remote sense or the trim. Consult the factory if you
need to increase the output voltage more than the
above limitation.
The amount of power delivered by the module is defined
as the voltage at the output terminals multiplied by the
output current. When using remote sense and trim, the
output voltage of the module can be increased, which at
the same output current would increase the power output
of the module. Care should be taken to ensure that the
maximum output power of the module remains at or
below the maximum rated power.
Figure 15. Effective Circuit Configuration for
Lineage Power
O
O
(+) and V
(+) and SENSE(–) to V
[V
SUPPLY
RESISTANCE
O
CONTACT
(+) – V
Single-Module Remote-Sense Operation
O
O
I
(–) terminals must not exceed the mini-
I
(–)] – [SENSE(+) – SENSE(–)]
V
V
I
I
(+)
(–)
O
SENSE(+)
SENSE(–)
(+) and V
O
(–) at the module.
V
V
O
O
(+)
(–)
JW075A5, JW075B5, JW075C5 Power Modules: dc-dc Converters:
(continued)
O
(–) terminals must
DISTRIBUTION LOSSES
I
O
CONTACT AND
36 Vdc to 75 Vdc Input; 5 Vdc, 12 Vdc, or 15 Vdc Output; 75 W
LOAD
0.5 V
8-651 (C).m
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. The trim resistor should be positioned
close to the module.
If not using the trim feature, leave the TRIM pin open.
With an external resistor between the TRIM and
SENSE(–) pins (R
(V
tion 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
point (V
Note: The output voltage of the JW075C5 module may
The following equation determines the required exter-
nal-resistor value to obtain a percentage output voltage
change of %.
Only trim the JW075C5 up 0.5 V maximum. See
note above.
The test results for this configuration are displayed in
Figure 21.
The voltage between the V
must not exceed the minimum output overvoltage
clamp voltage as indicated in the Feature Specification
table. This limit includes any increase in voltage due to
remote-sense compensation and output voltage set-
point adjustment (trim). See Figure 15.
O, adj
R
R
adj-down
adj-up
be increased to a maximum of 0.5 V. The 0.5 V is
the combination of both the remote sense and
the output voltage set-point adjustment (trim). Do
not exceed 15.5 V between the V
terminals.
) decreases (see Figure 18). The following equa-
O, adj
=
) increases (see Figure 16).
=
V
------------------------------------- -
O
100
--------- - 2
1.225 %
adj-down
%
100
–
adj-up
+
), the output voltage set point
%
O
), the output voltage set
k
(+) and V
–
--------------------------------- -
100
+
O
%
(–) terminals
2 %
O
(+) and V
k
O
(–)
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