Electronics > Beginners

Ripple current / voltage, what is too much?

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mvs:
You need to add some load. Try to set R4 to 10 Ohm.

T3sl4co1l:
For a 976k (5uA) load?

For a circuit that looks like it's made for, I guess a few amperes maximum load?

Tim

FriedMule:
I am trying to reach 500mA-1MA 2V-10V

Ohm law, right?

10V / 0.500 = 20Ohm?

It looks much more realistic:-)

What do you say?

not1xor1:

--- Quote from: FriedMule on October 26, 2018, 05:32:59 pm ---I am trying to reach 500mA-1MA 2V-10V

Ohm law, right?

10V / 0.500 = 20Ohm?

It looks much more realistic:-)

What do you say?

--- End quote ---

your circuit just doesn't make sense
1) the source voltage is too low (5V peak)  |O
  you must take into account:
  a) drop through the rectifier and ripple at the levelling capacitors (how much depends on the current)
  b) gate-source voltage must be higher than the Vgs threshold (how much depends on the current)
  c) drop through the regulator (how much depends on the current)

just use any voltage regulator IC for you first experiments, but read other people posts, study and experiment before trying to design any complicated circuit

FriedMule:
Thank you a lot, I'll happy for all your help:-)

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