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Why is my transistor heating up?
The transistor will only heat up if being over driven.. Either something is drawing too much current, you are demanding too much power, or it is being over clocked.. Normally it should only be warm, not a burning to touch feeling if you touch the transistor..
What are the on/off terminals of a transistor when it is operated as a switch?
Answer: With a zero signal applied to the Base of the transistor it turns “OFF” acting like an open switch and zero collector current flows. With a positive signal applied to the Base of the transistor it turns “ON” acting like a closed switch and maximum circuit current flows through the device. Hope it helps!!
Why does heat not transfer from transistor to heatsink?
Here are the reasons: 1) The quality of the components- If it is not original then it could cause heating problem 2) Heat compound dried up- Yes, sometimes when an equipment in service for a long time, the heat compound could get dry and this will cause the transfer of the heat from the transistor to the heatsink not to be so efficient.
What causes a transistor back body to get hot?
A new transistor with fresh heat compound will usually solve the problem. 3) Leakage- Although this is not so frequent, it did happened few times. The transistor back body had tiny leakage causing minor arc to the heatsink. The transistor could get hot and eventually burn.
Why does a MOSFET use a pull up resistor?
But …. relying on a resistor for pullup means it wastes power when on, as it produces a constant current. It also limits PWM speeds because the gate takes time to charge from the pull-up resistor and that means the MOSFET takes too long to turn on, wasting power (and producing heat) during its extended turn-on phase.
How is the threshold of conduction chosen for a transistor?
So transistors used as switches (FETs and BJT’s) are always inverting. Vgs is chosen from the specs or as a rule of thumb Vgs>2.5 x Vt (max) the threshold of conduction, also known as Vgs (th). TL;DR: I was driving my MOSFET gate at the supply voltage I was switching/ so I didn’t maintain a high enough V GS.