Help me understand this. I am searching on information on building a 10 amp battery charger. On the many sites I've seen circuits using the LM317 I see the Vout to Adj pin has 240ohm connected.
On more than one forum, including this one, I read experts state that it should be 120 for a minimum current of 10Ma and that 240 ohms only applies to the more expensive LM117
In one TI datasheet I've downloaded covering LM117, LM317A @ LM317-N all the diagrams show 240ohms but the chip is labelled LM117. Unless I've missed it I didn't see a note that the diagrams don't apply to the 317
I started to believe the 120 ohm story anyway....
However when I happened upon the Wikepedia page for LM317 I see datasheets from 5 manufacturers all of whom show 240 ohms in their LM317 datasheets..This includes Texas Instruments. So where is the 120 thing coming from ?
On more than one forum, including this one, I read experts state that it should be 120 for a minimum current of 10Ma and that 240 ohms only applies to the more expensive LM117
In one TI datasheet I've downloaded covering LM117, LM317A @ LM317-N all the diagrams show 240ohms but the chip is labelled LM117. Unless I've missed it I didn't see a note that the diagrams don't apply to the 317
I started to believe the 120 ohm story anyway....
However when I happened upon the Wikepedia page for LM317 I see datasheets from 5 manufacturers all of whom show 240 ohms in their LM317 datasheets..This includes Texas Instruments. So where is the 120 thing coming from ?
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