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JonasWielicki – It’s simpler and ‘safer’ to use a device rated for the gate-voltage available. Post as a guest Name. For small volumes the difference in part cost is likely a small fraction of an hour of my time. Is there are strong reason for using that part?
Do we have to expect any problems when driving datashet gate with less than that? Hence it isn’t worth designing something close to an edge which might use time later to check and debug it. Have we overlooked anything? For simplicity, I would use a part specified with an Rds on for a Vgs of 4.
JonasWielicki – Yes, that looks like a robust solution. Further the part is clearly specified by the manufacturer to work in that region. I went through a list of commonly used parts and picked a non-SMT part which seemed to meet the specifications. If this is a one off, or small volume system, I would make a ‘no-brain’ assumption, to make life easier, and, at least, double the required current to get a minimum device current. Email Required, catasheet never shown.
That might be a way to make an SMD device usable within a through-hole technology design. From the datasheet, I think it should be fine to use: Is there plenty of space?
(PDF) IRFD014 Datasheet download
We have no fast switching requirements. Sign up using Facebook. Sign up using Email and Password. You’ll need to re-consider your RDSon calculations. No, there is no strong reason for that part. I’d recommend using a device with lots of headroom.
There are quite a few parts which are specifically rated at 4. Sign up or log in Sign up using Google. The LEDs are rated at 3. datasueet
Home Questions Tags Users Unanswered. Typically the datasheet is much simpler to interpret. MichaelKaras Thanks for pointing this out!
IRFD Datasheet(PDF) – Vishay Siliconix
If through-hole is important, it might be easier to get a physically larger package, like an IPAK. From the datasheet, I think it should be fine to use:. This is a one-off design, and for assembly simplicity we would prefer through-hole and not SMT devices. When you give the gate something in the range of 4.
This will raise the temperature increase in your FET at load.