EMI Filter Design, 3rd Edition

15Initial Filter Design Requirements

With all applications, a filter design must start with a set of requirements, and the performance requirements of the filter are critical to design success. When considering a new filter, there are many constraints that will dictate the design drivers, and these are as follows:

1. Equipment application

2. EMC performance requirements

   1. CISPR, DO-160, MIL-STD-461, other

3. Mechanical constraints

   1. Form factor

   2. Weight

4. Business constraints

   1. Cost

   2. Use of standard/COTS parts

   3. Schedule

5. Input power source

   1. AC single or three phase

   2. DC single ended or floating (differential)

   3. Inrush requirements

   4. Lightning requirements

   5. Power-interrupt requirements

6. Output power load requirements

7. Switching frequency in the case of switching converters ...