output voltage isolation

[Dummyeng]

Hi
someone told me:i want to use a battery with three output which each one be isolated from other one

and my question is

is that mean i can use short circuit protection as a isolator?

my battery is 12v1.6Ah

 

[danadakk]

Does isolation mean you do not want any battery charging another
battery ? If so then you would use a diode in series with battery,
or a controlled MOSFET to insure battery only sources power, does not
get charged by another battery.

Diode would want to be a schottly diode to minimize current.

Questions :

1) Meaning of isolation ?
2) Battery voltage, type ?
3) Load current ?
4) Why 3 battery's ?
5) What charges battery ? Or are they consumables ?


Regards, Dana.

 

[Dummyeng]

thx
1-short circuit or when anything happen in one line doesnt effect on other line
2- 12V i dont know yet if u like u can reply these threat too https://www.edaboard.com/threads/battery-behavior-in-environmental-test.404506/
3-12V 1.6Ah its possible sometime all of current go from one line o split between them
4-no one battery with three isolated output
5-charges battery

 

[Akanimo]

@danadakk, I think by "use a battery with three output" OP is talking about one battery powering three separate circuits. I'm not quite sure.

 

[danadakk]

To do this form of load isolation you would need a switch in each load
path, and a shunt R to measure for short circuit current so that switch
could be turned off if that path drew too much current.

Simple Circuit Disconnects Load From Batt | Maxim Integrated

The following application note discusses how to disconnect a load from the battery using the MAX8212 microprocessor voltage monitor.

www.maximintegrated.com

Simple Circuit Disconnects Load | Maxim Integrated

An external power MOSFET acts as a load-disconnect switch and allows a switching regulator to start up with heavy loads and low-input voltages. A load-disconnect circuit boosts a single NiMH cell output to 3.3V and delivers output currents to 600mA.

www.maximintegrated.com

https://www.ti.com/lit/an/slva191a/slva191a.pdf?ts=1666352018054&ref_url=https%253A%252F%252Fduckduckgo.com%252F

Above could be modified for load disconnect.



Regards, Dana.

 

[stenzer]

Hi,

1-short circuit or when anything happen in one line doesnt effect on other line

so if a short current in one line (one of the three loads) occvure, the other two should not be affected. This quad smart-high-side switch [1] might be of interest, as it can turn off obe output by means of an adjustable current limit. I used a similar single channel IC, and it works quite good.

[1] https://www.ti.com/product/TPS4H160-Q1

BR

 

[Dummyeng]

But i have heard that when we speak about isolation we should use trans like dc-dc isolator vicore

Isolated Regulated

Isolated Regulated

www.vicorpower.com

Is it correct?