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LM358A for high-side current sensing

by Hammy <spamme@[EMAIL PROTECTED] > Jul 13, 2008 at 04:41 PM

I'm using an LM358A for high-side current sensing. I would like to be
able to use the other OP in the so-8 package as a thermal shutdown.
This means that both outputs would be connected to the same point R9&
R8 junction on the schematic. Q1 &Q2 are really a dual prebiased
MUN5311DW1T1-D I'm using as a latch.

Schematic

http://i37.tinypic.com/2z9csja.png

My question is do I have to place blocking diodes on the output of the
OP'S. If one output goes high it will place Vcc-1.5V on the output of
the other OP will this damage the OP?



I don't have any LM358A's on hand but I would like to be able to test
it with maybe a TLC27L2 so the same question for this OPAMP.

Thanks
 




 3 Posts in Topic:
LM358A for high-side current sensing
Hammy <spamme@[EMAIL P  2008-07-13 16:41:45 
Re: LM358A for high-side current sensing
John Popelish <jpopeli  2008-07-13 13:00:46 
Re: LM358A for high-side current sensing
Jamie <jamie_ka1lpa_no  2008-07-13 13:51:08 

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