FW250H1 Lineage Power, FW250H1 Datasheet - Page 10

• Manufacturer Part Number: FW250H1
• Description: CONVERTER DC/DC 24V 250W OUT
• Manufacturer: Lineage Power
• Series: FW250r
• Type: Isolated with Remote On/Offr

Specifications of FW250H1

• Output: 24V
• Number Of Outputs: 1
• Power (watts): 250W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: Module
• 1st Output: 24 VDC @ 10.4A
• Size / Dimension: 4.60" L x 2.40" W x 0.53" H (116.8mm x 61mm x 13.5mm)
• Power (watts) - Rated: 250W
• Operating Temperature: -40°C ~ 100°C
• Efficiency: 89%
• Approvals: CE, CSA, UL, VDE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -

FW250H1 and FW300H1 Power Modules; dc-dc Converters:
36 Vdc to 75 Vdc Input, 24 Vdc Output; 250 W to 300 W
10
10
Feature Descriptions
Overcurrent Protection
To provide protection in a fault (output overload) condi-
tion, the unit is equipped with internal current-limiting
circuitry and can endure current limiting for an unlim-
ited duration. At the point of current-limit inception, the
unit shifts from voltage control to current control. If the
output voltage is pulled very low during a severe fault,
the current-limit circuit can exhibit either foldback or
tailout characteristics (output-current decrease or
increase). The unit operates normally once the output
current is brought back into its specified range.
Remote On/Off
To turn the power module on and off, the user must
supply a switch to control the voltage between the on/off
terminal and the V
an open collector or equivalent (see Figure 15). A logic
low is V
The maximum I
should maintain a logic-low voltage while sinking 1 mA.
During a logic high, the maximum V
the power module is 15 V. The maximum allowable
leakage current of the switch at V
If not using the remote on/off feature, short the
ON/OFF pin to V
Figure 15. Remote On/Off Implementation
on/off
V
I
ON/OFF
ON/OFF
+
–
= 0 V to 1.2 V, during which the module is on.
on/off
I
I
(–).
(–) terminal (V
during a logic low is 1 mA. The switch
CASE
ON/OFF
V
V
I
I
(+)
(–)
SENSE(+)
SENSE(–)
on/off
V
V
O
O
on/off
(+)
(–)
). The switch can be
on/off
= 15 V is 50 µA.
generated by
8-580
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.:
The voltage between the V
must not exceed the minimum value indicated in the
output overvoltage shutdown section of 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 16.
If not using the remote-sense feature to regulate the
output at the point of load, connect SENSE(+) to V
and 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 16. Effective Circuit Configuration for
[V
O
SUPPLY
(+) – V
RESISTANCE
CONTACT
Single-Module Remote-Sense Operation
O
(–)] – [SENSE(+) – SENSE(–)]
I
I
O
V
V
(–) at the module.
I
I
(–)
(+)
SENSE(+)
SENSE(–)
Tyco Electronics Corp.
September 2001
V
V
O
O
O
(+) and V
(–)
(+)
Data Sheet
DISTRIBUTION LOSSES
I
O
O
CONTACT AND
(–) terminals
LOAD
0.5 V
O
8-651e
(+)