Other Parts Discussed in Thread: LM3481
Could you help to comments why we add D4 D5 on feedback net of LM3481?
Thanks.
Regards, Sunny
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Could you help to comments why we add D4 D5 on feedback net of LM3481?
Thanks.
Regards, Sunny
Hello Sunny,
Thanks for reaching out. When the FB pin of the LM3481 is grounded there is no soft-start functionality. For a flyback design this can be implemented on the secondary side by soft-starting the voltage reference and this is what you circled on the schematic of the EVM. The C and the R are defining the time constant of this soft start.
Kind regards,
Elisabetta