Discharging of Electrolytic capacitors

Thread Starter

Electronic_Maniac

Joined Oct 26, 2017
251
Hi all,

Consider the below circuit

upload_2019-1-4_15-30-37.png

I am applying the pulse 3b for 12V system. The pulse waveform is as mentioned in the ISO standard page 16 : http://www.compel.ru/wordpress/wp-content/uploads/2017/05/ISO-7637-22011E.pdf

upload_2019-1-4_15-32-15.png

this is my waveform at across C14.

My question is how does the capacitor discharge? Through which component does the current flowing during capacitor discharge?

Please explain in simpler terms for easy understanding.

Thanks
 

ericgibbs

Joined Jan 29, 2010
9,136
hi EM,
I would suggest when you have a LTS query you post your asc file and any non standard models.
It is a pain to redraw an existing circuit.:)

If U5 has zero internal resistance, the cap will discharge back thru U5

E

Update:
Also add Node Labels to your circuits, using F4 key,
So that we know which node the plot is showing.
 

ericgibbs

Joined Jan 29, 2010
9,136
hi EM,
Use LTS to measure/plot the current in U5.
Or you can add a 0.001R resistor is series with U5, measure voltage across it and the current thru it.
E
 

Thread Starter

Electronic_Maniac

Joined Oct 26, 2017
251
hi EM,
I would suggest when you have a LTS query you post your asc file and any non standard models.
It is a pain to redraw an existing circuit.:)

If U5 has zero internal resistance, the cap will discharge back thru U5

E

Update:
Also add Node Labels to your circuits, using F4 key,
So that we know which node the plot is showing.
@ericgibbs Sure thanks. I will share henceforth. What if I have a diode between the supply and E-Cap C14. Now, how will C14 discharge? What would be the path?
 

ericgibbs

Joined Jan 29, 2010
9,136
hi,
It would be helpful if you told us what is the purpose of the project.
Is it electronic ignition for a vehicle.?
E
 
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