LM503​​0： Usage of COMP and VFB pins

Hi Andy,
You can use the VFB pin to control variations in the input voltage (primary side).
This is sometimes called line feedforward.
This may give you acceptable line input regulation but you have 6 separate output voltage rails and you will still need the linear regulators on the outputs for acceptable values of output voltages.
You need to specify:
(1) Vin(min) and Vin(max)
(2) Vo1(min) to Vo6(min) and V01(max) to V06(max)
(3) I01(min) to Io6(min) and Io1(max) to I06(max)

You will find that it is very difficult to design a power supply with one switching regulator and six independent outputs.
That is probably why your application has a free running PWM and 6 linear regulators
Regards
John

Hi Andy,
It has been almost 4 weeks and I have not received any further communication. I will close this thread for now. If you have any further questions please open a new posting
Regards
John