Hi there -
I was shown this site by a friend and WOW what a great resource for those of us learning in the field of electronics!
I'm hoping that someone cna help with what seems a simple question, but it probably has a complicated (and interesting!) answer :-D
OK, so inductors "charge" and "discharge" exponentially as shown in many text books - example: http://hades.mech.northwestern.edu/index.php/RC_and_RL_Exponential_Responses
BUT, inductors are shown as having linear behaviour whenever you read about how SMPS work - example here: http://www.maximintegrated.com/eequiz/eeanswer.htm
So which is it???
While i wait for insights from the community here I am of course trying to explain this to myself... so far i am thinking that the exponential behaviour is how an inductor behaves when connected to a voltage step in an isolated case, but in an SMPS the other parts in the circuit are changing the behavior....like maybe the input cap on the SMPS?
Is the exponential discharge of the cap on the input of an SMPS matching the exponential charge of the inductor and giving a linear current rise?
thanks for any help in my learning!
I was shown this site by a friend and WOW what a great resource for those of us learning in the field of electronics!
I'm hoping that someone cna help with what seems a simple question, but it probably has a complicated (and interesting!) answer :-D
OK, so inductors "charge" and "discharge" exponentially as shown in many text books - example: http://hades.mech.northwestern.edu/index.php/RC_and_RL_Exponential_Responses
BUT, inductors are shown as having linear behaviour whenever you read about how SMPS work - example here: http://www.maximintegrated.com/eequiz/eeanswer.htm
So which is it???
While i wait for insights from the community here I am of course trying to explain this to myself... so far i am thinking that the exponential behaviour is how an inductor behaves when connected to a voltage step in an isolated case, but in an SMPS the other parts in the circuit are changing the behavior....like maybe the input cap on the SMPS?
Is the exponential discharge of the cap on the input of an SMPS matching the exponential charge of the inductor and giving a linear current rise?
thanks for any help in my learning!