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What happens if you put too much current through a MOSFET?
The MOSFET can easily be working after this – but of course its thermal performance is shot as the soft solder bond is damaged. Yes – if you put too much current through a MOSFET – it will fail.
Why are MOSFETs more common in industrial control systems?
The good news is that, as MOSFET technology improves, it seems to be getting more rare. It is also a failure mode which is more common on industrial control systems. These tend to be wired for neatness and appearance, so wires tend to be longer than is ideal and routing tends to be bad.
Where does the energy come from to clamp the MOSFET?
Fortunately, in most circuits, the energy the MOSFET may have to clamp is that contained in the rather small (lumped) inductance of the battery and its leads. See the article on PWM controllers in the 4QD TEC archives.
What should be the drain source resistance of a MOSFET?
Drain-Source resistance – Ideally we want Drain-Source resistance to be very high when no current is flowing, and very low when current is flowing. The main issue using MOSFETs with micro controllers is that the MOSFET may need 10-15 Gate-Source potential difference to get near its lowest Drain-Source resistance,…
What does MOSFET stand for in electric motor?
Even with the best design, the best components, and a new motor this can occur – often for seemingly inexplicable reasons. Indeed the term MOSFET came to stand for ‘Magically Obliterated, Smoke and Fire Emitting Transistor’]. The truth is that MOSFETs are incredibly robust – but that they can fail very fast indeed if their ratings are exceeded.
How does the high speed diode work in a MOSFET?
The high-speed (fast recovery) diode connects in parallel with the MOSFET/Schottky pair. It lets the freewheeling current bypass the MOSFET and Schottky completely. This ensures the MOSFET body diode is never driven into conduction. The duration of MOSFET on time can greatly impact thermal resistance.
What’s the breakdown voltage of a 60 V MOSFET?
These are complemented by NTMFS5C604NL, NTMFS5C612NL and NTMFS5C646NL models, which have breakdown voltage ratings of 60 V. Both 40- and 60-V devices are rated to operate at junction temperatures up to 175° C to facilitate greater thermal headroom for designs.