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by Triple Jim
Tue Dec 15, 2020 5:02 pm
Forum: Technical Discussion
Topic: LR8: an LM317 on steroids to stabilize up to 450 V
Replies: 13
Views: 6590

Re: LR8: an LM317 on steroids to stabilize up to 450 V

Dr Tony Balls wrote: Tue Dec 15, 2020 2:43 pm From the datasheet:
The output current limit is typically 20mA
There's the rub. Even a pretty simple 18W Marshall type is gonna draw 3X that.
Worse yet, that 20 mA is only good when Vin - Vout- = 12 volts. It tapers down to 0.5 mA when Vin - Vout = 450v.