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Electronics => Beginners => Topic started by: Vindhyachal.takniki on September 02, 2016, 04:27:54 pm

Title: Current Control
Post by: Vindhyachal.takniki on September 02, 2016, 04:27:54 pm

1. I have to control current of a load, so that whenever load increases from 5A it should trip & second there is no reverse current.
Operating voltage is 9V to 12.6V.

2. I was looking at LTC4358, it says its ideal diode for 5A. Features in it says "0.5?s Turn-Off Time Limits Peak Fault Current".
Does that mean it will trip after peak current? What's its value in datasheet? Also will the system auto retry after fault condition?

3. Also diode minimum operating voltage is 9V, what if any case error system voltage falls below it? Will the diode shut off or LTC4358 may overheat as its internal mosfet cannot be turn on completely?

Title: Re: Current Control
Post by: pyroesp on September 03, 2016, 01:17:35 am

1) Have a look at this : http://electronicdesign.com/power/current-limiter-offers-circuit-protection-low-voltage-drop (http://electronicdesign.com/power/current-limiter-offers-circuit-protection-low-voltage-drop)
It's a current limiter though, not something that disconnects the input voltage. How do you want to switch off the input ? Relay ? Transistor ? ...

Title: Re: Current Control
Post by: Vindhyachal.takniki on September 05, 2016, 05:24:49 am

How about using TPS25944A.
It gives current limit & provide reverse current protection also.