F4804A POWER ONE, F4804A Datasheet - Page 17

• Manufacturer Part Number: F4804A
• Description: DC-DC CONV INP FILTER 4A SMD
• Manufacturer: POWER ONE
• Series: Fr

Specifications of F4804A

• Filter Type: Power Line
• Voltage - Rated: 80V
• Current: 4A
• Mounting Type: Surface Mount
• Termination Style: Surface Mount (SMD,SMT)
• Operating Temperature Min Deg. C: -40C
• Operating Temperature Max Deg. C: 85C
• Rad Hardened: No
• Input Voltage Range: 0 V to 80 V
• Input Voltage (nominal): 48 V
• Package / Case Size: 21.59 mm x 19.05 mm x 6.78 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Inductance: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q4089730

F & FC Series DC-DC Converter Input Filters
FC Series, 0-100V, 5/10/20 Amps, TH Mount
DC C
R
:
URRENT
ATINGS
FC filters are rated for 5.0, 10.0, and 20.0 amperes DC at up to +60 °C. ambient temperature with 400 LFM of forced air
across the module surface, or with the case temperature otherwise held to a maximum of +100 °C. With no forced air and no
additional cooling, the same modules are rated for 3.5, 6.5, and 13 amperes maximum.
Safety Considerations
I
:
SOLATION
The FC Series EMI filters have 1500 Volt DC isolation from input or output to ground, but no isolation from input to output.
The output voltage is the input voltage.
F
:
USING
These filters have no external fuse. An external fuse must always be employed. In general, a 250 volt rated fuse must be
used to meet international safety requirements. The fuse value should be selected to be greater than the maximum input
current of the filter, which occurs at the minimum input voltage of the modules being powered through the filter. Both input
traces and the chassis ground trace (if used) must be capable of conducting a current of 1.5 times the value of the fuse
without opening. If one of the input lines is connected to chassis ground, then the fuse must be in the other input line.
C
G
:
ASE
ROUNDING
The FC Series filters have a non-metallic case. It cannot be grounded. Each filter has a ground pin which must be connected,
with as low an impedance as possible, to chassis ground in order for the filter to function properly.
Input Shutdown Pin
Many DC-DC converter modules have an input “shutdown”, or “control” or “ON/OFF” pin. In most cases, the reference or
return for this pin is the negative input pin of the module. When using such a system with an EMI filter module, the shutdown
return must be made directly to the pin of the module, which is the output of the filter, and not at the input of the filter. This
requires either an optical coupler or a relay, or other fully isolated device to control the module. There must not be any path
for DC current to bypass the module, or its filtering characteristics will be severely compromised.
In order to operate without the internal common mode inductors magnetically saturating, the positive leg and negative leg
currents in the filter must exactly equal. Even a small imbalance, as small as 10 ma, can create saturation of the inductors.
When this happens, they no longer function as filter elements.
MCD10059 Rev. 1.1, 21-Jan-10
Page 17 of 41
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