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Comparator hysteresis issues

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Pentoad:
I am using an LM239DT comparator in a project and can't get hysteresis to work at all. I have followed various design guides and used calculators but I can't stop it from transitioning rapidly as the input voltage approaches the threshold voltage. Adding in hysteresis resistors only has the effect of changing what voltage this fast transitioning occurs at. I have properly terminated the unused comparator in the chip as previously advised and this improved things a bit. Although not shown, the comparator has a 100nf capacitor on its supply and it's positive supply is connected to K14 which is just the output of a relay.

SiliconWizard:
Hysteresis needs positive feedback, not negative feedback.

Pentoad:
I never knew that. I swapped the inputs around and now hysteresis appears to be working as it should. I won't be able to use a P channel mosfet anymore though because the comparator output pulls down to ground when triggered.

MagicSmoker:
More specifically, the feedback resistor for hysteresis always goes to the Non-Inverting input, and if the reference also connects to that input then it needs to be through a resistor so that summing can occur.

StillTrying:
I won't be able to use a P channel mosfet anymore though because the comparator output pulls down to ground when triggered.

Use the spare comparator as an inverter?

R1 and R5 should be supplying just the feedback voltage not the gate drive?

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