jonnybgood
Full Member level 4
Hi,
attached is a schematic I found on the 7809 datasheet. When I am simulating it with different loads and short circuit protection kicks in,
the current stays at maximum while the voltage drops - something which follow Ohm's Law.
I read on a book how this configuration works: when current exceeds a certain value and 0.7V develop across Rsc, Qlimit switches on forcing all the current through the voltage regulator. The thermal shutdown of 7809 kicks.
Is this the effect of thermal shutdown of the regulator that is causing the current to stay at max while dropping the voltage?
attached is a schematic I found on the 7809 datasheet. When I am simulating it with different loads and short circuit protection kicks in,
the current stays at maximum while the voltage drops - something which follow Ohm's Law.
I read on a book how this configuration works: when current exceeds a certain value and 0.7V develop across Rsc, Qlimit switches on forcing all the current through the voltage regulator. The thermal shutdown of 7809 kicks.
Is this the effect of thermal shutdown of the regulator that is causing the current to stay at max while dropping the voltage?