FW300B1 Lineage Power, FW300B1 Datasheet - Page 10

• Manufacturer Part Number: FW300B1
• Description: CONVERTER DC/DC 12V 300W OUT
• Manufacturer: Lineage Power
• Series: FW300r
• Type: Isolated with Remote On/Offr

Specifications of FW300B1

• Output: 12V
• Number Of Outputs: 1
• Power (watts): 300W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: Module
• 1st Output: 12 VDC @ 25A
• Size / Dimension: 4.60" L x 2.40" W x 0.53" H (116.8mm x 61mm x 13.5mm)
• Power (watts) - Rated: 300W
• Operating Temperature: -40°C ~ 100°C
• Efficiency: 87%
• Approvals: CE, CSA, UL, VDE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -

FW250B1 and FW300B1 Power Modules: dc-dc Converters:
36 Vdc to 75 Vdc Input, 12 Vdc Output; 250 W to 300 W
Feature Descriptions
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 14. 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 %.
The test results for this configuration are displayed in
Figure 16.
The voltage between the V
must not exceed the minimum value of the output over-
voltage protection as indicated in the Feature Specifi-
cations table. This limit includes any increase in voltage
due to remote-sense compensation and output voltage
set-point adjustment (trim). See Figure 12.
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
10
10
R
adj-up
O, adj
R
adj-down
) decreases (see Figure 13). The following equa-
=
O, adj
------------------------------------------------------------------------- 205
V
) increases (see Figure 15).
=
O, nom
205
--------- - 2.255
adj-down
%
1
1.225 %
–
+
adj-up
--------- -
100
), the output voltage set point
%
O
), the output voltage set
(+) and V
–
(continued)
1.225
k
O
(–) terminals
–
2.255
k
be taken to ensure that the maximum output power of
the module remains at or below the maximum rated
power.
Figure 13. Circuit Configuration to Decrease
Figure 14. Resistor Selection for Decreased Output
Figure 15. Circuit Configuration to Increase
100k
10k
1M
1k
V
ON/OFF
CASE
V
V
ON/OFF
CASE
V
I
I
(+)
(–)
I
I
0
(+)
(–)
Output Voltage
Voltage
Output Voltage
PERCENT CHANGE IN OUTPUT VOLTAGE ( %)
SENSE(+)
SENSE(–)
SENSE(+)
SENSE(–)
10
V
TRIM
V
V
TRIM
V
O
O
O
O
(+)
(–)
(+)
(–)
Lucent Technologies Inc.
20
R
R
adj-down
adj-up
March 2000
Data Sheet
30
R
R
LOAD
LOAD
8-1171 (C).g
8-748 (C).b
8-715 (C).b
40