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100Hz at output in Tiny Switch supply

Posted by: tomogr1 on

Hello! I've designed the power supply based on TNY280GN and have small problem with 100Hz ripple at the output. I'm using 2x1000uF and 4,7uH bead ferrite as post filter.
Can you reccomend me some ideas to resoslve this problem ?
Regards, Tom.

Comments

Submitted by PI-Surak on 06/02/2009

Please send schematic for review

Submitted by tomaszgr1 on 06/09/2009

In reply to by prasun

Hello !
Please see attached file witch schematic.
Regards, Tom.