Overload Protection

From: Seth (berkowitz.seth_at_gmail.com)
Date: 03/29/05 

Date: 29 Mar 2005 09:16:38 -0800

Hello,
I have a question on embedded systems hardware. Hopefully someone can
help.

I'm working on an embeeded system project that utilizes an Altera 7064
PLD (I know it's outdated but I'm a student) My question is general
to any embedded device/processor. I want to make my system as robust
as possible, and prevent the PLD from overloading. A friend of mine
suggested adding a resistor between Vdd and the PLD that would drop
the voltage below the chip's minimum operating level if the current
was too large. For my operation frequency (16 MHz) the PLD is rated
at a typical supply current of 30mA from a 5V source. I calculated
that a 10 Ohm resistor would only drop the voltage by .3V under
normal usage but would drop a full 1V if 100mA were drawn, shutting
off the device. However, this resistance seems very small to me.
Perhaps because I am using an older device with a large current draw.

Can anyone tell me if this is a good method to prevent an embedded
device from overloading or suggest a better alternative?

Thanks!!
-Seth

Relevant Pages

  • Re: Overload Protection
    ... > I'm working on an embeeded system project that utilizes an Altera 7064 ... and prevent the PLD from overloading. ... > the voltage below the chip's minimum operating level if the current ... A series resistor sounds like a dreadful idea because it will make your ...
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  • Re: Overload Protection
    ... and prevent the PLD from overloading. ... > the voltage below the chip's minimum operating level if the current ... of useful articles. ... It takes more than just a well placed resistor to make the interfaces ...
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  • Re: Overload Protection
    ... and prevent the PLD from overloading. ... resistor is a suboptimal choice. ... the chip will take what you measured it to draw. ...
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  • Re: Overload Protection
    ... and prevent the PLD from overloading. ... > the voltage below the chip's minimum operating level if the current ... When cool they switch on again, ...
    (comp.arch.embedded)
  • Re: Overload Protection
    ... and prevent the PLD from overloading. ... > the voltage below the chip's minimum operating level if the current ... Ian Bell ...
    (comp.arch.embedded)