The new Model FE-280A Series of DC/DC Converters
offers up to 20 watts of power in a small aluminum case. Units are
available in single, dual or triple outputs. All units include input
and output filtering to meet stringent EMI requirements. The converter
can offer regulation of better than 1% at end of life, typical 12
The units can operate from bus voltages of
20 VDC to 46 VDC over a 35 percent range. The input to output isolation
is 1 megohm minimum.
The Model FE-280A series uses a constant frequency
pulse width modulated, current mode control switching regulator
design with a switching frequency of 250 kHz nominal. Transformer
coupling is implemented in the forward power circuit and feedback
loop for high isolation and reliability.
All active circuitry is contained in the hybrid.
The magnetics and the input-output filters are mounted on a multilayer
printed circuit board with the hybrid. All power components are
directly coupled to the base plate for low thermal resistance. (Maximum
junction temperature at ambient 60 C is 95 C).
The above features are incorporated in our standard
designs. Modifications of these units can give unlimited flexibility.
Some options that can be incorporated into these designs are:
1. Synchronized switching rate; used to
control interference in critical applications.
2. Bus inputs available (20V-60V).
3. Reverse Polarity protection.
4. Commands for ON and OFF.
5. Input preregulator for improved ripple rejection.
Dedication to Quality
FEI's exceptional reliability is due to tight
control of quality. This is facilitated by a high degree of vertical
integration, which allows us to take full responsibility at every
The thin and thick film hybrids we design and produce
(in Class 10,000 cleanrooms) meet levels S and B of MIL-M-38510
and have been certified by prime contractors.
Our certified instuctors in turn train and certify
our operators to MIL-STD-2000. Our soldering meets WS-6536 (USN),
MIL-S-45743E (USAF) and NHB 5300.4 (341) (NASA).
The FEI management system focuses on quality and
exceeds the requirements of MIL-Q-9858A, monitored by DCAS.
PC board design and fabrication is QPL-listed for
MIL-P-55110D types GF, GY, GR and GI, and has been qualified in
space. We are conducting a continuing TQM initiative to produce
the highest quality product.
Reliability by Design
This enviable record testifies to our dedication to reliable design
and process control. Wherever possible, proven sub-assemblies are
used in our custom designs. These include our own hybrids, qualified
for space. Semi-conductors and other parts are derated by at least
2:1 electrically and mechanically, and conservatively rated for
thermal and radiation stress.