Flyback Charger 5V - 2A
Posted by: Switcher64
on
Goodmornig,
i have to design a flyback power supply 220VAC INPUT, 5V - 2A OUTPUT,
i'm using your LNK6448K, but reading the application notes i don't understand what voltage should have FB PIN generates from the voltage divider.
In the way to have 5V output , wich voltage should have FB PIN? 5V or 1.94V?
Thank you in advance
Marco
Comments
Hi Marco,
Sorry for the delayed reply.
Yes, FB pin reference voltage is 1.94V (typ) when secondary rectifier is conducting.
Please refer to the data sheet page no.9.
Here is the design example for 5V/2A design.
https://ac-dc.power.com/sites/default/files/PDFFiles/der403.pdf
Regards,
PI-NANO
Any one cn help me?