eem2am
Banned
hello,
I just did flyback PFC with L6561 and app note AN1059...
iNPUT = 240V ac and OUput = 12V
datasheet:
https://www.st.com/stonline/books/pdf/docs/5109.pdf
AN1059:
https://datasheet.digchip.com/000/000-1-AN1059.pdf
My circuit as like fig 16, page 17 of AN1059
Anyway, i have ripple on output of 1 volt pk pk.
The average output was just below the required 12Volt,......so i put a 22nF cap across the lower feedback divider resistor and it was then risen OK to 12 Volt.
Is this bad?
I hear it is bad to put cap in parallel with the lower feedback divider resistor?
The load is constant load ...just LEDs
I just did flyback PFC with L6561 and app note AN1059...
iNPUT = 240V ac and OUput = 12V
datasheet:
https://www.st.com/stonline/books/pdf/docs/5109.pdf
AN1059:
https://datasheet.digchip.com/000/000-1-AN1059.pdf
My circuit as like fig 16, page 17 of AN1059
Anyway, i have ripple on output of 1 volt pk pk.
The average output was just below the required 12Volt,......so i put a 22nF cap across the lower feedback divider resistor and it was then risen OK to 12 Volt.
Is this bad?
I hear it is bad to put cap in parallel with the lower feedback divider resistor?
The load is constant load ...just LEDs