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modified 11 years ago

Zener diodes explained

3
11
166
01:56:54
Diodes are loyal. They will stop electricity with all their might, until they blow up. Zeners are not. When pressure gets too high, 10 =20:2 in this case, they will give up. Useful!
published 11 years ago
thebugger
11 years ago
What you call pressure is actually current and it's limited by a resistor. The operating point is around 15mA.
hurz
11 years ago
One can see voltage as pressure, i like this analogie
thebugger
11 years ago
Except he shouldn't say voltage but current that passes through the zener. When it gets too high it should be limited. A good operating point is around 15mA. And since in the zeners the voltage remains constant while the current varies one needs to ensure it doesn't go above its mW rating. (V.I). Now thats what I call pressure. The power not the voltage. Like when 20000V pass through a human. It's low pressure when the current is low (like with piezoelectric igniters,ESD) and mostly harmless but when the current gets higher then the ,,pressure,, can overwhelm the body. See my analogy?
hurz
11 years ago
Voltage is pressure and cause current. And 20000V are 20000V doesn't matter were they come from.
thebugger
11 years ago
The voltage gets pushed by current through the zener. Like in pipes. They can always retain the water (charge) but once you open the valve (put a load) the pressure (in our case current) pushes the water (the voltage) through the pipes (yet again the load in our case) with a given strength (power). The strenght is amount of water (U,V) multiplied with the pressure it gets pushed with (I,A) Its all basic ohms law. The power aka pressure through a certain part of a circuit is U.I. Since the voltage remains constant through the zener the current varies. And once the passing current increases to a certain point the zener may get damaged and as he said may blow. Therefore not the voltage damages the zenner but the current that pushes the voltage through the zener with a given pressure. See where am I going with this? Just look at a zener diodes volt-ampere characteristic and you'll notice that current damages the zener not the voltage.
hurz
11 years ago
"The power aka pressure" it won't get better if you repeat the nonsense.
thebugger
11 years ago
But it gets better when you repeat your gibberish?
faceblast
11 years ago
huh
faceblast
11 years ago
repeating yourself is a form of THD
thebugger
11 years ago
:D now that's a nice analogy :D
rbrtkurtz
11 years ago
lolololol

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