Hi readers,
When I used this IRF 3205 which has high capacitance between the Gate-Source of the mosfet, whenever I add a lower pull-down resistor, the switching becomes faster and faster (visible nice square wave). For my case, for IRF 3205 to fast switching at 20kHz (nice square wave), it would require a 50 Ohm pull-dwon resistor. Unfortunately, And assuming driving with 12V for Gate-Source, it would means that 12V^2/50=3 Watt on the resistor and that's huge? May I know whether this is how to use the mosfet correctly that is to add a very low pull-down resistor for fast switching or are there any other ways?
Cheers
When I used this IRF 3205 which has high capacitance between the Gate-Source of the mosfet, whenever I add a lower pull-down resistor, the switching becomes faster and faster (visible nice square wave). For my case, for IRF 3205 to fast switching at 20kHz (nice square wave), it would require a 50 Ohm pull-dwon resistor. Unfortunately, And assuming driving with 12V for Gate-Source, it would means that 12V^2/50=3 Watt on the resistor and that's huge? May I know whether this is how to use the mosfet correctly that is to add a very low pull-down resistor for fast switching or are there any other ways?
Cheers