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Diode Electronics
zener diode voltage regulator?
I have this problem involving a zenor diode voltage regulator circuit. The zener is a 1N4753. R=56 ohm. Vin = 12 v. The load varies from 0 to 150mA. How would i calculate the load setting( RL) when the zener comes out of breakdown?
here is the drawing of the circuit:
http://img.photobucket.com/albums/v233/jster28/1-1.jpg
p.s.
I'm not looking for the answer, but some guidence on how to solve this problem. This is my first electronics class, so i'm kinda confused on how to solve this problem.
take a look at the datasheet for the 1N4735 at one of these suppliers
http://www.datasheetcatalog.com/datasheets_pdf/1/N/4/7/1N4753.shtml
from there you can get the zener voltage - this model appears to be a 6.2V device (i assume you mean the ..35 not ..53)
The 2 resistors act as a voltage divider - so the applied voltage across the zener is related to the ratio of the 2 resistances.
so you need to calculate the resistance Rl that would create 6.2V across the zener. this is the point where it conducts. If Rl is lower than this value, it will pull more current and the voltage drop across R will be more than 12-6.2V - so the zener cannot regulate. if Rl is higher than this value, more than 6.2V is applied to the zener and it conducts, regulating the voltage to 6.2V.
lookup the links below to understand how to calculate the voltage divider and good stuff on Thevenin and Norton equivalent circuits which will help with more complex examples
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why we use a single direction current in electronics circuits (which is attained by a diode)?
actually i had asked abt functions of a diode in my last question
and i got the answer that diodes usually used to get a single direction current in electronics circuits...now a question is raised in my mind that why we use a single direction current in electronics circuits,,,i mean where ,,,which part of a electronic circuit single direction current is used and why
plz answer with ur best
a big thnx in advance
Current that flows in one direction is direct current. Current that flows in alternating directions is alternating current.
Most electronic appliances run on direct current. If they operate from an AC wall plug, the internal power supply converts the AC to DC. A battery is provides current in one direction only.
The power supply for most electronic components must be DC. The reasons are beyond the scope of this question.
Most consumer electronics, such as your ipod, amplifiy AC signals. The analog playback of an MP3 is AC. You could say that an ipod uses DC in order to reproduce and amplify AC signals.
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