DFR0457 Slow Switch Off Speed

Hi all

 

i'm using a DFR0457 mosfet in a project hooked up to an RP2040.

 

Its listed as having the following chars:

Switching Character: T(on)=20us/T(off)=50us

 

I was wondering why the MOSFET never really stopped the flow of current in my application.

When i hooked it up to the scope, it looks like the rise time of Gate voltage is >>300us instead of the 20/50us listed in the specifications.

 

running a simulation online, with the gate input capacitance modelled as 6.2nF, the waveform in the simulation matched very close to what i was seeing on my scope.

 

are the resistors on my unit wrong or something?  They're 33k and 3.3k.

in the simulation, it looks like switching these to being 3.3k and 0.33k gives a timing value closer to the expected results.

 

cheers!