Under-Temperature Switch

Posted on Nov 7, 2012    5125

The reference current is fed from the supply voltage via Rl, to the inverting terminal, and the variable (noninver

Under-Temperature Switch
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ting) current is supplied from the junction of R3 and R4. Because the value of Ri is approximately double that of R2, and generates a current that is proportional to the supply voltage, the trip temperature (preset via R3) is independent of the supply voltage.

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