Our product line consists of nine standard package sizes covering
broad range of power from 10 to 10,000 watts. We deliver
custom magnetics on the basis of standard packages. Every
size can be customized
for most popular power topologies and appropriate switching
frequency. Packages are based on our proprietary cores
ER025, ER035, ER055, ER075,
ER110, ER135, ER220, ER350, and ER560. Core description
always starts with ER because this is an industry standard
abbreviation for a core
with round center leg and straight outer walls that still
looks like a letter “E” in profile. A three-digit number
after letters ER identifies an effective cross-section
area of a core
in square millimeters. Below are nine transformers that
are offered:
P025 transformer
P035 transformer
P055 transformer
P075 transformer
P110 transformer
P135 transformer
P220 transformer
P350 transformer
P560 transformer
Each core has a library of available multi and double-layer
printed circuit boards / planar windings, etched or stamped
copper leadframes, and insulators. We combine different
printed circuit board based planar windings with a number
of single turn leadframes, insulate them from the core
and each other when appropriate, and bond planar “stack” and
the core together. Each construction is unique and produces
a custom transformer or inductor that will be highly repetitive
in production. PQC does not offer standard transformers.
We will design a custom planar magnetics for every qualified
application.
Table 1 is
a basic selection matrix for transformers. It is recommended
to consider this table as useful guide only. Power capacity
of every core varies greatly as a function of converter
topology, operating frequency, available cooling, isolation
requirements, and input/output currents. |
