This is a hypothetical project, but we keep getting requests for voltage regulators in the 10 amp range. I'm not excepting myself, eventually I'll be building something along those lines.
One of the first thoughts I had was something like this. It would not be totally stable, since as the transistor heats up (at 10A with any voltage drop it will need lots of heatsinking) it will drop more voltage across the BE junction. The current limiting will disappear, and a lot of safety circuits protecting the load besides.
It is simple however, and should work.
A better approach may be to put the transistor right after a standard LM317 regulator, it occurs to me the variation in BE voltage will be multiplied, whereas a simple voltage follower will only drift as much as the transistor.
Ideas from other folks?
One of the first thoughts I had was something like this. It would not be totally stable, since as the transistor heats up (at 10A with any voltage drop it will need lots of heatsinking) it will drop more voltage across the BE junction. The current limiting will disappear, and a lot of safety circuits protecting the load besides.
It is simple however, and should work.
A better approach may be to put the transistor right after a standard LM317 regulator, it occurs to me the variation in BE voltage will be multiplied, whereas a simple voltage follower will only drift as much as the transistor.
Ideas from other folks?
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