What's the difference btw pi-filter(choke replaced as resistor) and an RC filter?
The pi-filter is used as a filter after a rectifier to a positive linear regulator 7805
(a 240Vac to 5V DC project)
Does the pi-filter increases the inrush current as the first cap charging current is not reduced by any resistor while a simple RC filter has the resistor before the cap?
Using a multisim simulation without the PI-filter, the inrush current is less. using just a RC capacitor input filter, I can use a lower VA transformer for rectification and same max load.
The peak current is much lower. You should start of with a design , say 12V at 1A with less then 10mV of ripple. Now compare the two circuit, because as I said one uses more current, the other more voltage. For virtually all applications people use just a big reservoir capacitor, or follow it with an IC regulator.
Frank