Introducing our latest series of low-loss, flat coil surface mount planar transformers that
deliver high efficiency power to applications with tight height constraints.
Our new planar series consists of the PH08xx and the PH09xx platforms (see
switch
mode transformers
for more details), which are pin compatible with Pulse’s legacy
PA08xx and PA09xx series, but with lower DCR. This technology uses a copper fill
factor that is twice that of a PCB so the direct current resistance (DCR) of the primary
winding is reduced by 50% and the power rating is increased by 20% to deliver up to
500 watts of power capability. Replacing the traditional multilayer PCB winding with a
flat coil winding reduces the price by approximately 20%.
Regarding this latest launch, Gerard Healy, Product Manager for Pulse Electronics
Power BU stated:
“Traditional multilayer PCB windings with up to 8 consecutive winding layers give rise to
high leakage inductance, producing unacceptably high voltage spikes and snubber
circuit losses. Replacing the multilayer PCB with a reduced number of flat coil winding
layers connected in series provides immediate benefits by reducing the AC proximity
effect on copper losses. In addition, more winding segments and selective coupling
between simultaneously conducting windings can be implemented to reduce the
leakage inductance. This improved interleaving capability has been demonstrated to
increase the PSU efficiency on high power systems by 2%.”
Key Features
Our new standard series of planar transformers measure 21.6 x 23.4 x 8.6mm up to
26.7 x 29.5 x 11.9mm and are a pin-compatible replacement to our existing multilayer
PCB-based planar transformers. By eliminating the cost and time to fabricate PCBs for
new winding arrangements, this transformer has the additional advantages of flexibility
and speed to prototype for custom variations.
Gen 2 Planar:
Flat Coil Winding
Platforms:
2 sizes, 23x22mm to 29x27mm
Height:
< 11.9mm profile
20% price reduction compared to PCB
50% lower DCR Power Rating - up to 300W
SMD, 1500Vdc Isolation
Custom design capability up to 1KW/4KV
RoHS compliant & meet standard EIA481 requirements
Applications
Low profile/high efficiency bus converters for distributed power architecture
Datacom System Cards
Industrial Control
Robotics
Planar magnetics have been primarily implemented as a high power (>100W) low profile
(< 12.5mm) solution for medium to low voltage conversions, such as the intermediate
bus converter in a distributed power architecture. In recent years, the move to discrete
DC/DC power modules with embedded designs has fueled strong growth in planar
opportunities. “Pulse is delivering more cost-effective and higher performance solutions
in response to this,” commented Healy.
电源技术
