Hello ...
So I've been playing with this circuit that uses a digital pot as the adjustment resistor for an LM317. I feed the voltage from the output of the 317 through a hall effect current sensor then to the leads on a discharged LiIon battery... using an Arduino, I monitor the current flowing to the battery and adjust the 317 to keep the current stable for the main portion of the charge cycle...
But I noticed right away, that even at 400 milliamps, the 317 gets REALLY HOT and I was under the impression that the 317 is rated for 1.5 amps... I couldn't imagine the thing would survive 1.5 amps for any real length of time...
Is this normal for the 317 or do you think I'm doing something wrong?
Thank you,
So I've been playing with this circuit that uses a digital pot as the adjustment resistor for an LM317. I feed the voltage from the output of the 317 through a hall effect current sensor then to the leads on a discharged LiIon battery... using an Arduino, I monitor the current flowing to the battery and adjust the 317 to keep the current stable for the main portion of the charge cycle...
But I noticed right away, that even at 400 milliamps, the 317 gets REALLY HOT and I was under the impression that the 317 is rated for 1.5 amps... I couldn't imagine the thing would survive 1.5 amps for any real length of time...
Is this normal for the 317 or do you think I'm doing something wrong?
Thank you,
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