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Part Number: UCC28910
There is no explanation about how to choose L1, L2, R1, and R2 parameter for effective EMI reduction as input AC line filter in the datasheet(I can understand that those components are used for AC line filtering for EMI reduction from following description in the UCC28910's datasheet )
10.2.1.2.2 Input Stage Design and Bulk Capacitance4. A line filter (L1, L2, R1, and R2) to reduce EMI generated by switching.
Could you tell me how to choose those parameters properly?Do you have any app note about the input line filter setting? If yes, please let me know the document number.
I'm also curious what kind of side effects will come out if we don't put the line filter in there since those components are big size and take non-negligible costs.Could you tell me what kind of case we can remove the filter in the system using UCC28910?(ex, PMP9171)
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In reply to Eric Faraci:
OK, I understood that L1, L2, R1, and R2 are part of the input EMI filter and those component might be needed to pass strict EMI exam.
Could you tell me where we can find how to choose the parameter in the documents? I didn't find the discription in the documents, so please let me know where is it.
Also, Are these components optional? Or we much put them there? In douments below, I found the following sentence and it says those componenets are for ESD protection and to prevent input oscillations. So, I could not judge whether it is mast or arbitrary.
R1, R2 serve the dual function of dampening input filter oscillations and prevent a large voltage being developed across L2 and L3 in the event of an ESD pulse.
In reply to Takashi Onawa:
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