Improved 5V regulator with shortcircuit protection

191

03:07:14

This is a 5V 1.5A linear regulator made up of discrete components. The output voltage is set to 5V (it has a dropout of ~4V) and has a current limit of 1.5A. The line and load regulation Cannot be calculated due to the poor resolution of the scope.

For detailed explanation, look at my previous circuit: http://everycircuit.com/circuit/6305068551503872

published 6 years ago

GLaDOS

6 years ago

Really useful. Nice

kiani

6 years ago

Could you not make it shut down, not using supply power. Maybe a latch.!? Sort of thing!? Rrseting after the removal of short, !?

PrathikP

6 years ago

It's possible, but it's an inconvenient feature for a regulator. I'll try anyways.

PrathikP

6 years ago

But what do you mean by not using the power supply?

kiani

6 years ago

Sorry badly worded. .. Meant the current limit, do more than just limit, .. But trips off the o/p, so the supoly (i/p) power is a minimum,,, ( ideally switched off.). So it does not see the over load.

kiani

6 years ago

Have you heard of fall back, (current?!)

kiani

6 years ago

Wgere are yiu gone sleeping again! Lol.

PrathikP

6 years ago

You mean foldback?

PrathikP

6 years ago

I was designing that latching overcurrent protection.

PrathikP

6 years ago

I'll try to design a foldback fault protection later.

PrathikP

6 years ago

But there isn't a big difference between a foldback design and a latch-off overcurrent protection. In a foldback design, the output current is limited to a very low value. In a latch-off design, the current goes to zero.

kiani

6 years ago

Thats right,,,,, latch type just shut down,, two types resetable, or not, and switch supply off/on is required... The othe say if the o/p current limit is 12 Ampers resched then it derops to say 2 Ampers,,,, this might not hold if short circuit occurs,,,,

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