(Answers in blue)
I'm still confused, but I found this video tutorial of how to read a datasheet and would like to switch to that transistor just to stay with the tutorial.
This is the datasheet
https://www.fairchildsemi.com/datasheets/TI/TIP120.pdfAccording to the tutorial, this transistor only required 120mA on the base pin to turn it out and it can handle as high as 5A across the Collector to Emitter. Does that mean I can use a signal anywhere from 120mA to 5A on the base pin?
I'm having a hard time understanding the "Electrical Characteristics" section of this transistor datasheet...
The guy doing the tutorial said that for the Collector Cut-Off Current with the base at 0, "using at 30V, it's going to take .5mA before the current cuts off, that's how far it's going to drop down"
What does he mean by the current cuts off? Is that just the transistor acting like an open switch?
For the Icbo section, I'm confused as to how there could ever be a situation where 60V would be going from Collector onto the Base... wouldn't that be the transistor being fried?
When a transistor is referred to as an "amplifier", does that just mean it's a switch that can be toggled with a much lower current/voltage than what is actually going through the collector/emitter? I'm not sure why there would be a "DC Current Gain" if it's just a switch being toggled by a smaller signal... is that just referring to what the collector/emitter can handle, not what is actually "gained" through amplifying some signal?
What does it mean to have saturated the transistor? On this datasheet, it says that the transistor can "sustain" 60V, but then is saturated at 2V when the collector is 3A and the base is 12mA...
The Base-Emitter On Voltage is the voltage it would take to turn the transistor even though it would still only take 120mA? So the example they gave was that when there was 3V and 3A being applied to the collector, it would take 2.5V (and 120mA) to turn the transistor on?