MOSFET for reverse polarity protection
Posted: 15 Jun 2018, 23:53
Hello everybody.
Once again I decided to take an interest in protection from reverse polarity.
In classic pedals we have 2 popular protection options.
1) 1N4001 at which we lose tension
2) 1N4148 which works like a kamikaze
Both options are popular, but have the disadvantages described above.
Tell me more about the p-channel mosfet.
I understand correctly that it does not burn like 1N4148 and does not make voltage drop like 1N4001?
There are many variants of these transistors, what characteristics should I look at?
I looked at the Walrus boards and saw the components in the body of the sot-223.
Other elements capable of protecting the circuitry I did not see on the board.
What do you think - is this a mosfet?
If so, I have 2 questions:
1) What are the variants of schemes?
2) What parameters are important for a transistor?
Once again I decided to take an interest in protection from reverse polarity.
In classic pedals we have 2 popular protection options.
1) 1N4001 at which we lose tension
2) 1N4148 which works like a kamikaze
Both options are popular, but have the disadvantages described above.
Tell me more about the p-channel mosfet.
I understand correctly that it does not burn like 1N4148 and does not make voltage drop like 1N4001?
There are many variants of these transistors, what characteristics should I look at?
I looked at the Walrus boards and saw the components in the body of the sot-223.
Other elements capable of protecting the circuitry I did not see on the board.
What do you think - is this a mosfet?
If so, I have 2 questions:
1) What are the variants of schemes?
2) What parameters are important for a transistor?