JW050R Lineage Power, JW050R Datasheet - Page 13

• Manufacturer Part Number: JW050R
• Manufacturer: Lineage Power

April 2008
Feature Descriptions
Remote Sense
The voltage between the V
must not exceed the minimum output voltage clamp
value as indicated in the Feature Specifications table.
This limit includes any increase in voltage due to
remote-sense compensation and output voltage set-
point adjustment (trim). See Figure 30.
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 30. Effective Circuit Configuration for
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.
Lineage Power
O
(+) and SENSE(–) to V
SUPPLY
RESISTANCE
CONTACT
Single-Module Remote-Sense Operation
I
I
V
V
(continued)
I
I
(+)
(–)
SENSE(+)
SENSE(–)
O
O
(–) at the module.
V
V
(+) and V
O
O
(+)
(–)
(continued)
dc-dc Converters; 36 to 75 Vdc Input, 28 Vdc Output; 50 W to 150
DISTRIBUTION LOSSES
I
O
O
(–) terminals
CONTACT AND
LOAD
8-651 (C).m
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 ý%.
The test results for this configuration are displayed in
Figure 32. This figure applies to all output voltages.
With an external resistor connected between the TRIM
and SENSE(+) pins (R
point (V
The following equation determines the required exter-
nal-resistor value to obtain a percentage output voltage
change of ý%.
Only trim up to 0.5 V maximum. See note above.
The test results for this configuration are displayed in
Figure 34. For applications requiring voltages between
28 V and 52.5 V, consider using the JW200S52R51
trimmed down.
The voltage between the V
must not exceed the minimum output voltage clamp
value as indicated in the Feature Specifications table.
This limit includes any increase in voltage due to
remote-sense compensation and output voltage set-
point adjustment (trim). See Figure 30.
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.
Note: The output voltage of this module may be
O, adj
R
R
adj-down
adj-up
) decreases (see Figure 31). The following equa-
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 28.5 V between the V
V
O, adj
O
(–) terminals.
=
) increases (see Figure 33).
=
⎛
⎝
V
------------------------------------- -
⎛
⎝
O
100
--------- - 2
Δ%
1.225Δ%
(
adj-down
100
–
adj-up
+
⎞ kΩ
⎠
), the output voltage set point
Δ%
O
), the output voltage set
(+) and V
)
–
(
--------------------------------- -
100
Δ%
+
O
(–) terminals
2Δ%
)
O
⎞ kΩ
⎠
(+) and
13