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But it will be lower, say it is mA. Sign up using Facebook. This is from BC datasheet: Hi, Attila, thanks so much for prompt reply.
2SC Datasheet(PDF) – List of Unclassifed Manufacturers
This is being used in a flyback circuit, which switches at approx ummm kHz or so. This would severely limit the lifetime of an already stressed component.
What type of voltage booster circuit is this? I have a circuit in which the C aka 2SC transistor failed after many years. I have short-term access to another C – putting that in the circuit works just fine, so I know the transistor is the issue.
Post as a guest Name. Attila Kinali 1, 1 9. BC hFE from to Hence a load at its emitter or collector can cause it to have a negative impedance at its base. I have seen them referred to as ‘switching’ transistors somewhere, I don’t know what that specially means. This is your circuit: So power dissipation would be mW, which is above maximum allowed power dissipation.
Thanks for that, but just want to clarify where do I put the resistor?
Home Questions Tags Users Unanswered. Thanks, any help appreciated! Seeing that your circuit has no feedback resistor anywhere on the 2SC, I would suggest to try adding a 10R resistor in the base of the 2SC resp BC after the 22R resistor that goes to the feedback path and see whether that improves the situation.
Now look datasheeg the datasheets to compare those two transistors what is the Vce for such current. My previous, sort-of related question is here: Sign up or log in Sign up using Google. Hi there Chupacabras, when I replace it with a good C the whole circuit works just fine. Well, it’s whether excessive base current, or excessive product of Ic x Vce. This is from 2SC datasheet: Datasueet would take too much space to explain the exact mechanism here, but the gist is, the transistor acts as an impedance conversion element at high frequencies due to beta being frequency dependent.
Base current is not a problem, it is limited by R to 4.