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TNY279 dosen't start unless we touch pin #1 with a probe pin

Posted by: navid5700 on

Hi
I have the same problem that was discussed in below link:
https://ac-dc.power.com/forum/low-power-design/tny279-dosent-start-unless-we-touch-pin-1-probe-pin/?language=ja
please help me.
thanks.

Comments

Submitted by PI-Phlox on 04/28/2020

Thank you for using PI products.
Can you please provide the following
-Input Voltage
-Output parameters (Voltage and Current)
-Schematic, transformer
-PI Expert Online file (If you have)
-PCB layout