FW300R1 Lineage Power, FW300R1 Datasheet - Page 11

• Manufacturer Part Number: FW300R1
• Description: CONVERTER DC/DC 28V 300W OUT
• Manufacturer: Lineage Power
• Series: FW300r
• Type: Isolated with Remote On/Offr

Specifications of FW300R1

• Output: 28V
• Number Of Outputs: 1
• Power (watts): 300W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: Module
• 1st Output: 28 VDC @ 10.7A
• 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: 90.5%
• Approvals: CE, CSA, UL, VDE
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• 3rd Output: -
• 2nd Output: -
• 4th Output: -

Data Sheet
March 2000
Feature Descriptions
Output Voltage Set-Point Adjustment (Trim)
(continued)
Figure 16. Resistor Selection for Increased Output
Output Overvoltage Protection
The output voltage is monitored at the V
pins of the module. If the voltage at these pins exceeds
the value indicated in the Feature Specifications table,
the module will shut down and latch off. Recovery from
latched shutdown is accomplished by cycling the dc
input power off for at least 1.0 second or toggling the
primary referenced on/off signal for at least 1.0 second.
Output Current Monitor
The CURRENT MON pin provides a dc voltage propor-
tional to the dc output current of the module given in
the Feature Specifications table. For example, on the
FW250R1, the V/A ratio is set at 370 mV/A
70 C case. At a full load current of 9 A, the voltage on
the CURRENT MON pin is 3.33 V. The current monitor
signal is referenced to the SENSE(–) pin on the sec-
ondary and is supplied from a source impedance of
approximately 2 k . It is recommended that the
CURRENT MON pin be left open when not in use,
although no damage will result if the CURRENT MON
pin is shorted to secondary ground. Directly driving the
CURRENT MON pin with an external source will
detrimentally affect operation of the module and should
be avoided.
Tyco Electronics Corp..
100M
10M
1M
0
Voltage
PERCENT CHANGE IN OUTPUT VOLTAGE ( %)
0.4
0.8
(continued)
1.2
FW250R1 and FW300R1 Power Modules: dc-dc Converters:
O
(+) and V
1.6
36 Vdc to 75 Vdc Input, 28 Vdc Output; 250 W to 300 W
10% @
8-2052 (C)
O
(–)
2
Synchronization
Any module can be synchronized to any other module
or to an external clock using the SYNC IN or SYNC
OUT pins. The modules are not designed to operate in
a master/slave configuration; that is, if one module fails,
the other modules will continue to operate.
SYNC IN Pin
This pin can be connected either to an external clock or
directly to the SYNC OUT pin of another FW250x or
FW300x module.
If an external clock signal is applied to the SYNC IN
pin, the signal must be a 500 kHz (±50 kHz) square
wave with a 4 Vp-p amplitude. Operation outside this
frequency band will detrimentally affect the perfor-
mance of the module and must be avoided.
If the SYNC IN pin is connected to the SYNC OUT pin
of another module, the connection should be as direct
as possible, and the V
shorted together.
Unused SYNC IN pins should be tied to V
SYNC IN pin is unused, the module will operate from
its own internal clock.
SYNC OUT Pin
This pin contains a clock signal referenced to the V
pin. The frequency of this signal will equal either the mod-
ule’s internal clock frequency or the frequency estab-
lished by an external clock applied to the SYNC IN pin.
When synchronizing several modules together, the
modules can be connected in a daisy-chain fashion
where the SYNC OUT pin of one module is connected
to the SYNC IN pin of another module. Each module in
the chain will synchronize to the frequency of the first
module in the chain.
To avoid loading effects, ensure that the SYNC OUT
pin of any one module is connected to the SYNC IN pin
of only one module. Any number of modules can be
synchronized in this daisy-chain fashion.
I
(–) pins of the modules must be
I
(–). If the
I
(–)
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