View previous topic :: View next topic |
Author |
Message |
rich77777 Guest
|
Posted: Tue Jun 19, 2007 3:46 am Post subject: Voltage drop across resistor in series with zener diode |
|
|
how do i find this? i thought i would take the 22v source and just subtract the 0.7v that the diode takes.
but i am wrong, please help me!!  |
|
Back to top |
|
 |
vtech
Joined: 08 May 2006 Posts: 1264 Location: USA
|
Posted: Tue Jun 19, 2007 4:42 am Post subject: |
|
|
The .7v drop across a standard silicon junction is correct, however a zener diode behaves as an open circuit until reaching it's rating & acts like a voltage regulator/crowbar during it's avalanch mode. In other words the voltage drop across a Zener diode will equal to whatever it's rated when "zenering" ---NOT .7v as in a regular diode.
Purpose of the resistor is to limit the current through the zener during it's breakdown voltage region.
Here's a detailed example;
http://www.allaboutcircuits.com/vol_3/chpt_3/9.html |
|
Back to top |
|
 |
|
|
|
You can post new topics in this forum You can reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|
eServiceInfo on FB -
Service Manuals Free Download -
Service Diagrams
Free TV Schematics Download -
HARDW.net -
Pinout Master -
Jabse Search -
Jabse.InK -
Pulsator
SnimkiOt.com -
Poblizo.com : пътешествия
Latest Service Manuals :
TOSHIBA TV+Toshiba+2075-Chasis+U+14+R- • DENON DENON+AVC+2020+2020G+3020+audio • PHONOLA Phonola 551 components 2 • Pioneer IS61C1024L-15TI • panasonic b sc • 2sa1806 e . Electronic Components Datash • Christie DWU1052 DHD1052 SM CHRISTIE • 05 Wiring Diagram Samsung • Repairing-USB-Ports-2093 apple • 22sd1998 2 • CLX-6210FX Samsung • v390h LG • 5991-3849EN E7515A UXM Wireless Test Set • For Zip & Rar Winrar (Free) • A660 A665 - PHQAA LA-6831P(2) TOSHIBA •
|