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I designed 300V-800V to 24V,4A flyback converter using L6566BH. With RCD snubber of 470kΩ,2.2nF values, the converter is fine except switch stress of about 1500V at full load. To reduce it when I changed snubber to 235kΩ,4.4nF, IC got failed.

HSHAR.1
Associate

‎2020-07-23 10:49 PM

Is there any probable reason and solution for it?

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