That is why i asking if the FET can handle it or not! (And none of you people actually realize it
The Microcontroller's PWM output has very little current. and in many cases, it'll required to be "umped" up by a driver chip so that the FET can be turn on properly. (For the cars, you need them, but for aircraft ESC, it might not required.)
if the FET didn't turn on properly, and in some case, Biased correctly. The FET will be blown. In the worse case, The microcontroller will be destroyed! (That what happened when i build my 2nd ESC)
I think TLU-101 ESC FET are not drain current from MCU directly , it drain current from high voltage charge pump and control logic. Because all FEt are N CHANNEL one , NOT P AND N Mixed H bridge.It ...
Please note that the mosfet is driven by driver whose signal come from MCU. The RMS mosfet driving current is very small as it is voltage control device. However, the peak driving current can be large. Usually, the lower Rdson mosfet would take higher peak driving current which the mosfet driver may not be able to handle it.
To play safe, you can select a lower Rdson mosfet with same or smaller total gate charge. Then the peak driving current will not exceed your original ESC driver capability.
Please note that the mosfet is driven by driver whose signal come from MCU. The RMS mosfet driving current is very small as it is voltage control device. However, the peak driving current can be l ...
I say it drain current from mosfet driver and not mcu directly(please note that mosfet driver has individual power supply),and the mosfet driver output a high voltage that come from the charge pump inside the mosfet driver!!!!!!
So, it is depend on mosfet driver output current that can handle it or not!!!!
樓主: mortarheadd
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umped" up by a driver chip so that the FET can be turn on properly. (For the cars, you need them, but for aircraft ESC, it might not required.)
