I am building a P-Mosfet gate driver and I have a question regarding the behavior of a PNP transistor connected in this way:
This circuit might look pointless, but it's a good representation of a stage, in which my totem pole driver can be locked for a longer period (this might be even used somewhere else, not just in this application).
I simulated this circuit in "falstad" simulator and built it using BC338 & BC327 transistors. It works quite good, the rise time for a 50nF capacitor is close to 400ns and without a capacitor - probably a few picofarads, because it's a breadboard about 100ns. The Mosfet that I want to drive has ~2nF of Gate capacitance.
This transistor is now connected like 2 diodes in parallel, but current prefers BC junction. I would like to know if the transistor won't get damaged in the long term by pulling current from Collector to Base, instead of, like it is supposed to - from Emitter to Base. In this circuit the current is relatively small, but if this connection is valid then maybe I might use it somewhere else.
Now the part of my circuit that does the Gate driving looks like this:
The Zener diode is required because I want the Mosfet to be quite fully turned on (10 volt drop will work fine on the whole VCC range, the Mosfet won't complain and at the same time I don't want to be near Vgs max values, the Vgs will be either a couple of millivolts or -10 volts).
Sw1 will be later replaced by a transistor of course, I don't expect higher frequency than 50kHz, maybe 100kHz. If it will work fine with the legendary UC3843 SMPS driver, then I will use it as a backup AGM battery charger.
Please excuse me my mistakes in English and Electronics, I am a beginner and to make matters worse not a native English speaker. Besides my question, if You find any mistakes in my design, then please let me know in the comments.
