slopagafud
New Member
How fast can a IRFU9020 be switched? Im looking to get a 9v,30khz pulse.
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Hero999 said:Yes, look at the datasheet, it will tell you how long it takes for the MOSFET to turn on and off.
**broken link removed**slopagafud said:Im not so good at reading the datasheets yet, Im pretty new to all this.
Nigel Goodwin said:30KHz isn't really particularly fast, but you may have to take precautions to switch an FET that quick.
slopagafud said:Precautions? Please explain.
Hero999 said:However at 30kHz it shouldn't be a problem, an astable 555 timer is all you nead.
On what do you base this assertion?mneary said:You need more than 5V to properly turn the gate on.
The data sheet. The relevant chart is "typical saturation characteristics" since the OP intends to use it as a switch. Note that this is "typical" and could be plus or minus 1 volt (e.g. you could be facing the 4V or 6V curve) depending on where your gate threshold is relative to "typical". This assumes that your PIC is putting out 5V with no losses.On what do you base this assertion?
It'll help him get a handle on reading data sheets in general, which was the only point. I couldn't find a tutorial specifically addressing MOSFET data sheets. Instead of complaining, perhaps you can supply one.mneary said:**broken link removed** should really be titled "How to Read an Op Amp Data Sheet" because it doesn't say anything about MOSFETs. I'm surprised that you expected it would help the OP.
Hero999 said:The IRFU9020 is not a logic level MOSFET.