EEVblog Electronics Community Forum
EDA => Circuit Studio => Topic started by: Myeevblogacc on December 21, 2020, 04:02:54 am

Hello everyone,
I’m interested in building a current limiter circuit to use with a 12 volt battery to power on car amplifier at low current.
Can anyone help me with an idea?
Thanks in advance

Hello everyone,
I’m interested in building a current limiter circuit to use with a 12 volt battery to power on car amplifier at low current.
Can anyone help me with an idea?
Thanks in advance
why do you need a current limiter?

Hello everyone,
I’m interested in building a current limiter circuit to use with a 12 volt battery to power on car amplifier at low current.
Can anyone help me with an idea?
Thanks in advance
First figure out exactly what you want it to do. Do you want it to do nothing until the current reaches 'X' amps and then a) shut off b) foldback the current to a lower level or c) let exactly 'X' current through ?? Or some other mode of operation?

Maybe this Is what you need:

Hello, and thank you for the quick response.
When repairing an car amplifier, sometimes is needed to regulate the current to reduce the risk
Of generating more problems.
I have a 12 volts 20 amps power supply which current can be adjusted from 320 amps.
What I will like is to find the way to regulate the current of a 12 volts battery the same way I do with my 20 amps
Power supply.
Thank you

The simplest way is with PTC resettable fuses.
https://www.mouser.com/datasheet/2/643/dscp0zrsseries1664088.pdf (https://www.mouser.com/datasheet/2/643/dscp0zrsseries1664088.pdf)