| ??? 11/05/08 10:46 Read: times |
#159728 - Let the circumstances be any? Responding to: ???'s previous message |
Steve M. Taylor said:
Ap, Andy is just saying "worst case" depends on circumstances - if a driver transistor goes open circuit, some motor drivers might accelerate to dangerous speeds, others might safely stop dead. Yet another topology might accelerate away if teh driver goes short circuit.
Steve Steve , Thats ok , I just asked for its effect on the base of an NPN transistor. I asked : Ap said:
"Hi, If an NPN transistor in the circuit blows . Should we expect any voltage entering from collector to base , or is it a case of open circuit?. Ap" Andy says : Andy said:
http://www.8052.com/forumchat/read/159640 "and we don't know what the circumstances were, so there's absolutely no way whatsoever to say what might have happened in this case! " Let the circumstances be any? , a blown transistor is a blown one.I just wanted to know is the base side protected , without going much deeper in the discussion which may be an endless topic of discussion. Does IGBT technology makes the base of the transistor any safe from the collector side high voltages? Best/ AP |
| Topic | Author | Date |
| Transistor failure question | 01/01/70 00:00 | |
| no guarantee on behaviour | 01/01/70 00:00 | |
| stronger | 01/01/70 00:00 | |
| and... | 01/01/70 00:00 | |
| Thermally destroyed power transistors... | 01/01/70 00:00 | |
| can be both way | 01/01/70 00:00 | |
| When the die alloys then... | 01/01/70 00:00 | |
| Assumptions | 01/01/70 00:00 | |
| Question for Andy | 01/01/70 00:00 | |
| the worst case is... | 01/01/70 00:00 | |
| Assumptions; Conclusions; Guesses | 01/01/70 00:00 | |
| Jan is saying | 01/01/70 00:00 | |
| Worst case | 01/01/70 00:00 | |
| Let the circumstances be any? | 01/01/70 00:00 | |
| Incorrect! | 01/01/70 00:00 | |
| Not entirely true | 01/01/70 00:00 | |
| That's the point! | 01/01/70 00:00 | |
| Oh Andy | 01/01/70 00:00 | |
| No, it wasn't | 01/01/70 00:00 | |
| explanation | 01/01/70 00:00 | |
Not at all... | 01/01/70 00:00 |