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Kai Klaas
10/31/05 18:49
Read: 567 times
Germany


 
#103206 - Power-MOSFETs contain an additional ...
Responding to: Bruce Grenade's previous message
Bruce said:
I just don't understand how C5 ever charges and really why it's there in the first place.

Many Power-MOSFETs have a built-in protection diode which becomes conducting whenever drain is more positive than source. This drain to source diode would shunt the inductive kick to C5 and charge it, when the coil is suddenly switched-off.
In your schematic this built-in drain to source diode isn't shown, which I assumed to be the drawing mistake I mentioned.

Kai

List of 6 messages in thread
TopicAuthorDate
Trouble understanding this circuit      Bruce Grenade      10/29/05 22:54      
   Also...      Bruce Grenade      10/29/05 23:00      
   Active snubber?      Kai Klaas      10/31/05 06:06      
      maybe?      Bruce Grenade      10/31/05 06:49      
         shooting sparrows with RPGs      Erik Malund      10/31/05 08:00      
         Power-MOSFETs contain an additional ...      Kai Klaas      10/31/05 18:49      

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