Very long time to reach 5vdc(at power on) at low temp condition ?(TNY279P + TLP181GB)
Posted by: Kim Kyung Duck
on
I have designed power supply (220vac -> 5vdc...) by TNY279P + photo coupler TLP181GB.
It works very well at normal temperature condition.
But,It reach 5vdc very long time(about 1 min) initial power on condition
at low ambient temperature(-5 deg).
What shall I do ? Please advice ...
回應
Kim Kyung Duck
Thank you for your mail.
I attach circuit as *.pdf format.
First power on(-5 deg low ambient temp),secondary voltage is about 3vdc.
It takes very long time(about 1 minutes) from 3vdc to 5vdc.
But normal temp condition,All is ok.
Please help me.(kdkim55@naver.com //www.chirontech.co.kr)
Thank you.
Hi,
Please provide us a schematic of your power supply in order to help you further.
Regards
PI-Sarek