Choosing The Right SMPS Transformer – Miracle Electronics

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A multitude of electrical and electronic personal
daily-use products, such as computers, mobile
phone chargers, automobiles, telecommunications,
and security systems, involve the usage of SMPS
transformers, making it one of the most in-
demand transformers across the globe.
These transformers are used to provide galvanic
isolation at the input, meaning a clear barrier
that prevents dangerous high voltages from
passing to the output, thus providing safety
from electrical shock. However, one disadvantage
of such isolated power supply is low efficiency,
which can range between only 70 to 90. What
causes low efficiency? As the power supply is run
at high voltage/current, strong magnetic fields
are passed into the core of the SMPS
transformer, which causes hysteresis in the
magnetic core as the input AC signal oscillates.
Further, because of such high input current, the
core can saturate during operation, leading to
even severe hysteresis and heat dissipation. Due
to this, almost every SMPS transformer
manufacturer in India supplies hysteresis curves
with their components, allowing the designer to
determine the limits on the input current.
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What problem can low efficiency cause? How can it
be resolved? Lower efficiency of the SMPS units
can cause heat up to higher temperatures when
run at high voltage/current. This is why thermal
management strategies are required to remove the
heat. Heat sinks can help here, as they provide
sufficient cooling when used with
chassis-mounted fans. How to place an SMPS
transformer effectively? SMPS transformers can be
placed in one or more locations in a regulator
circuit, in any of the multiple power conversion
and regulation stages. But, one very common
location for the transformer is between the
output regulation stage and the switching stage.
However, the exact location for the SMPS will
depend on the power supply topology two common
topologies being flyback converter and forward
converter. How to choose your SMPS
transformer? There are a variety of SMPS
transformers that use different core materials,
coil numbers, and winding directions. For
instance, different core materials saturate at
different magnetic field strengths, which
determines the highest voltage that can be used
with the transformer. Generally, 2 coil
transformers are the most common, while 3 coil
transformers are used to provide multiple output
power levels from a single SMPS circuit. In this
way, you must be able to determine the exact
specifications that you require. You must be able
to choose the ideal SMPS transformer for your
application. It must be one that operates within
the linear hysteresis range for your supply, in
order to minimize heating and power
loss. Partnering with a professional SMPS
transformer manufacturer in India, one like
Miracle Electronics, can ensure that every minute
detail about designing the transformer is taken
care of. Thats because they are skilled and
capable of designing unique customized SMPS
transformers for your particular application,
delivering RoHS and REACH compliant solutions
that guarantee minimal power wastage and highest
possible efficiency. Miracle Electronics SMPS
transformers have a high power-to-size ratio,
with each segment topology having a unique V-in
to V-out transfer function, leading to absolute
efficiency. Hence, with a reliable transformer
manufacturer like Miracle Electronics, your
transformers produce the desired output voltage,
ensuring that the ripple is within your
tolerances.