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when does transistor has power dissipation
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Answer Posted / sarath
the power dissipation occurs due to reverse saturation
current during collector junction is reverse biased..the
reverse saturation current increases with 5degree rise in
temp .. and reverse(other leakage currents) currents
increases with 10 degree rise in temp.. due to this overall
collector current increases which makes decrease in
collector to emitter voltage which cuases the transistor
driven into cut off..........this process is called thermal
runaway
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