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Why do logic-level MOSFETs require gate driver IC?
Sometimes, even if you use a logic level MOSFET, you might still need a driver to rapidly charge and discharge the gate capacitance to minimise switching losses. The switching of a MOSFET generates heat in the device.
Can a 5V logic drive destroy a MOSFET?
Now at logic 5v high my mosfet will probably gget destroyed because the voltage at the gate (referenced to source) will be -45v which is waaay past the +- 20. Now thats not ideal since the the highest i can run it with my 5v logic is 20v way below its rated 80v.
How does a low voltage logic level converter work?
The circuit uses an n-channel MOSFET to convert the low voltage logic level to a high voltage logic level. A simple logic level converter can also be built using resistive voltage dividers but it will introduce voltage loss. MOSFET or transistor-based logic level converters are professional, reliable, and safer to integrate.
What is the gate voltage of a microcontroller?
This is much less than the many MOSFETs, which can be in the thousands of pF. Also these MOSFETs have a higher gate voltage. A 3.3V or 5V signal, which is the maximum of a pulse modulated signal delivered by a microcontroller, is often not enough for the MOSFET. Usually 8-12V is required to fully turn on the MOSFET.
Do you need a driver for a MOSFET?
If not, you will probably need to use a driver. Since you apparently are just using it as an on/off switch (i.e., switching speed is not that important), a simple level shifter to 5.0 volts may work, or find a mosfet that is characterized for your voltage.
What are the features of gate driver ICs?
Gate Driver ICs are availabel in different configurations and offer features like low undervoltage lockout (UVLO) option for MOSFETs (5 V), fast propagation delay, integrated bootstrap diode with SOI technology, high driving current, and over current protection.