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Transistor Overheating

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crutschow

crutschow

Joined Mar 14, 2008
38,504
MisterBill2 said:
It looks like the value of resistor R6 is too high. 1K would provide a better base pull-down function. It would not do for transistor leakage current to be increasing the output voltage.
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10kΩ will absorb at least 50μA of leakage current, but going to to 1kΩ or so would be better at high temperatures with no significant change in circuit operation.
 
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