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In rare cases, the problem may not be resolved. |
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EMC noise solution |
Conducted emission noise |
File name：Conduction-noise-summary.pdfExplains the equivalent circuit for conducting noise measurement and the causes of noise generation. |
File name：Low-band-noise-solution.pdfThis file introduces noise suppression methods for conduction noise, mainly at 0.15 to 0.5MHz. |
File name：Middle-band-noise-solution.pdfThis file introduces noise suppression methods for conduction noise, mainly at 0.5～10MHz. |
File name：High-band-noise-solution.pdfThis file introduces noise suppression methods for conduction noise, mainly at 10～30MHz. |
Radiated emission noise |
File name：Radiation-noise-solution.pdfThis file introduces methods for suppressing radiated electromagnetic noise. |
EMC solution at transformer |
| EMC noise can be reduced by replacing the transformer without changing
the power supply circuit or PCB layout. Introducing a method to solve EMC noise by improving the transformer structure. |
Noise Immunity |
Lightning surge |
| Y-capacitor connection method and lightning surge resistance |
Protective Function |
Output Over Load Protection |
Output Over Voltage Protection |
| Output overvoltage protection is intended mainly to protect the load circuit. Explains the operation of overvoltage protection and test procedures. |
Output overvoltage abnormal operation under overload. |
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An abnormal operation may occur, such as the output overvoltage protection being activated when the output is overloaded. This section explains this abnormal operation. |
File name：OVP-solution.pdf |
Secondary Side Synchronous Rectification |
File name：2ndSR-solution.pdfTo solve secondary side synchronous rectification malfunction caused by transformer coupling. |
Audible noiseIn switching power supplies, various electrical parts generate audible noise. |
File name：Find-audible-noise-parts.pdfExplains how to find parts that are generating audible noise. |
Design Manual |
File name：Bill-of-material-manual.pdfIntroducing know-how on selecting appropriate parts for switching power supplies. |
File name：PCB-design-manual.pdfBoard design know-how for switching power supplies with low noise and stable operation. |
File name：De-Rating-manual.pdfThis file explains the purpose and concept of De-Rating andhow to measure and calculate the voltage, current, and power consumption of each component in a switching power supply. |
File name：Magnetic-saturation-manual.pdfThis 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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