LM317: LM317KTTRG3

Agxin Justin xavier

Part Number: LM317

Tool/software:

When LM317 Is used for constant current regulation ..

When used for this application when no load is connected (open ) what is the power dissipation due to IADJ path ? ..

when capacitive loads are connected after the caps is fully charged what is the power dissipation ?

0 Hannah Grace 6 months ago

Hello,

Thank you for your questions.

What is the input and output voltage?

What capacitors are you using?

Also, just for clarity, the output current is .48mA?

Best,

Hannah

0 Agxin Justin xavier 6 months ago in reply to Hannah Grace

28V

82mF electrolytic capacitor

yes R is 3* 7.5 ohms in parallel

0 Hannah Grace 6 months ago in reply to Agxin Justin xavier

Hello,

Just to verify again before I start calculations; there is no drop in the voltage between input and output?

If there is no drop, it seems that the power dissipated without a load would be 2.8mW.

I am still calculating what the power dissipation would be with the capacitors connected.

Best,

Hannah

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