nikhilele said:
below circuit shows a 3 terminal or any type of regulator it may be switching type also.
At ouput we have large capaictance 3300uF on when power is applied a large current will be required to charge this and now if regulator is of 250mA rating then this current surge may be fatal to regulator am i right.
So what are suggestion to protect that.
I donot remeber I once saw a diode from input to ouput which serves for the purpose. I am not sure about this.
like most people who make circuits with voltage regulators
you forgot the add the surge delimiter resistor in series with the voltage supply to the regulator
this is usualy a low value in the R zone
for 5v 1amp lm7805 this is 27R
if you negate this resistor the ic{voltage regulator} will be damaged
buy excessive current
both inrush and back rush
so it will try to switch off and on very fast as it peeks in current use to supply the needed voltage
you must add a spring to it in the form of a low value resistor to add a dampening
effect to the current modes it uses
to use it hence regulate properly the voltage over a wide range of use and current paths with respect to the time its uses the current then voltage for
inrush only isnt enough
and is infact in a standby psu
what uses the current and gets hot
where a simple resistor is all that needed
and bairly gets warm so uses far less overall current
and is the right approch to regulaton using ics
a bed is hard unless it has springs
much like suspension in a car
for ac systems inrush protection is enough but dc
requires each way shuffle