(开关电源EMI设计)Integrated EMI/Thermal Design for Switching Power Supplies

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Integrated EMI/Thermal Design for Switching Power Supplies
开关电源EMI设计

In recent years, many of the design issues of a power supply have been
intensively addressed. Issues such as power stage topology, control modeling,
performance analysis, soft-switching topologies, and magnetic component optimization.
However, two major issues, EMI control and thermal management have been far from
adequately addressed. Cut and trial method is normally used to solve these problems.
Switch-mode power supplies generate high frequency noises because of their
switching action. In the continuous effort to increase converter power density, switching
frequency is becoming higher which, in general, makes EMI performance worse. The
generated noises from the power stage may cause malfunction of control circuitry within
the converter itself, as well as electromagnetic compatibility (EMC) problems to the
surrounding equipment. EMI noises need to be controlled and minimized. A variety of
EMC standards regulates conducted and radiated emission and have become more
stringent in recent years.

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