Latch up current measurements

[kitepassion]

Hi all,

Coud you suggest me an High side current circuit/component that I can use to measure the current consumption during a latchup event?

Usually the voltage is around 3.3V 5V.

Cheers
Salvatore

 

[schmitt trigger]

And the usual current is = ??

Allegro Semiconductor makes the ACS712 current sensor chips

 

[kitepassion]

The normal current really depends on the device tested. It can range from 80uA up to 50 mA. It should be an High side current sensing with a shunt resisitor.

 

[schmitt trigger]

Then search for Linear Technologie's app notes for high side current sensing.
There is an app note which has a couple dozen different circuits that will do what you require.

 

[dick_freebird]

Many lab power supplies will read back current over GPIB,
are you overthinking the problem?

 

[kitepassion]

Many lab power supplies will read back current over GPIB,
are you overthinking the problem?

This is what I am currently doing but I need something portable.

 

[dick_freebird]

Touchstone was making some cute little high side current
monitor ICs, don't know if they're available (company has
gone bust, maybe somebody buys the bones, or not).