This website will be integrated into SMPS Solution in 2025.


SMPS Solution and Proposal

SMPS EMC noise solution

Conducted emission noise

※Please note that the problem may not be resolved.
  File name:Conduction-noise-summary.pdf
Explains the equivalent circuit for conducting noise measurement and the causes of noise generation.
File name:Low-band-noise-solution.pdf
This file introduces noise suppression methods for conduction noise, mainly at 0.15 to 0.5MHz.
File name:Middle-band-noise-solution.pdf
This file introduces noise suppression methods for conduction noise, mainly at 0.5~10MHz.
File name:High-band-noise-solution.pdf
  This file introduces noise suppression methods for conduction noise, mainly at 10~30MHz.
 

Radiated emission noise

※Please note that the problem may not be resolved.
  File name:Radiation-noise-solution.pdf
  This file introduces methods for suppressing radiated electromagnetic noise.
 

EMC noise countermeasures by improving the transformer

    We will introduce EMC noise countermeasures that can be done
by simply replacing the transformer without changing the power supply circuit.

SMPS Control stability

※Please note that the problem may not be resolved.
  Malfunction of the overvoltage protection function during overload.
  Overload protection
  Improves circuit breakdown in overload protection tests.
  Overvoltage protection
  Improves circuit breakdown in overvoltage protection tests.

SMPS Audible noise

(In switching power supplies, various electrical parts generate audible noise.)
  File name:Find-audible-noise-parts.pdf
  Explains how to find parts that are generating audible noise.

SMPS Design Manual

  File name:Bill-of-material-manual.pdf
  Introducing know-how on selecting appropriate parts for switching power supplies.
  File name:PCB-design-manual.pdf
  Board design know-how for switching power supplies with low noise and stable operation.
  File name:De-Rating-manual.pdf
  This file explains the purpose and concept of De-Rating and
how to measure and calculate the voltage,
current, and power consumption of each component in a switching power supply.
  File name:Magnetic-saturation-manual.pdf
  This file explains the measurement of magnetic saturation,
the situations that tend to occur, and how to improve it.
When magnetic saturation occurs in the transformer core,
there is a high possibility that efficiency will deteriorate,
unstable operation, and element destruction will occur.


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