mosfet high frequency.

[mr.man]

I'm try to run mosfet with high frequency..30 khz..10 duty cycle. i got turn off switching in mickro second but when i read data sheet is about nano second. Is it normal?, or is anybody have idea to reduce this turn off switchingView attachment 90037

 

[D.A.(Tony)Stewart]

Turn off time is raised by load capacitance and open circuit impedance.

In order to lower Toff, you need an active load or push pull CMOS driver or half bridge type circuit or a narrow pulse on a very low RLoad.

Read specs for test conditions where tOFF applies.

VGS = 10 V, ID= 40 A
Rise time tr — 300 — ns Turn-off delay time td(off) — 550 — ns
RL= 0.75 Ω

 

[ALERTLINKS]

Input capacitance of scope attached also play part.