International Rectifier / Infineon IRF MOSFET are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for International Rectifier. Buy IRF, N-Channel MOSFET Transistor 57A V, 3-Pin TOAB IRF Browse our latest mosfets offers. Free Next Day Delivery. Charactiristics IRF MOSFET transistor. Type: n-channel; Drain-to-Source Breakdown Voltage: V; Gate-to-Source Voltage, max: ±20 V; Drain-Source.
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You DO need to add some dead time to the signals you drive this circuit with. Replacing the driver chips fixes the problem – only until next failure. I’ll need to think about this in the context of regenerative braking a bit later I think. See this question I wrote electronics. Datasheet says that driver is operational up to V switching voltage.
IRF MOSFET Datasheet pdf – Equivalent. Cross Reference Search
Also, your last two suggestions: Is it the current generated when gate is discharged? I suspect an inductive spike or something You DO need to add some dead time to the irf irc drive this circuit irf Also on my test circuit the rightmost iirf3710 voltage divider resistors are not mounted.
I have also been using 0. Since these will carry HF current ripple, make sure they’re rated for your ripple current use the kHz rating in datasheet. Trevor above idf3710 even that I use Ohm instead.
Add irf cap irfwith ripple irf rated for the motor current. The diodes are for delaying turn on and making sure turn off is very fast. This can manifest itself in two ways: Why it has failed: Not sure irf the diodes D8 and D9 without a series resistor are OK. So far adding bypass caps on 48v rail seems to be the solution I added one 47uF 50V electrolytic and 2 0. Post as a guest Name. If it is driving back into irf is supplying irf rail it can cause some rather unfortunate effects.
All of these can create issues. Because the gate resistances are too big, the switching rise time is very big, therefore the MOSFETs are cross conducting at the same time making a short. When the circuit fails, a short circuit occurs on the supply, but nothing gets hot I have a current limit on the power supply so the short circuit current never exceeds 5A.
None of the mosfets have failed so far though. Is there any other driver similar to the ones I use right now that can provide much higher currents assuming current rating is the issue?
IRF3710, N-Channel MOSFET Transistor 57A 100V, 3-Pin TO-220AB
Still I find it disturbing if3710 failure of the driver causes both mosfets to switch on causing the short circuit. Can the above circuit irf at irf or do I irt to completely irf it? My tests show that Ohm is “ok” in terms of turn on time.
Sign up or log in Sign up using Google. Regardless of whether I use 12V or 30V to drive the load, the driver seems to fail when the load draws around 3A.
The middle one continued to switch as normal – the broken ones went into locked state with both mosfets switched on causing a short on the power rail. Where have you seen resistors ofit could be that they were 3. Irf gate resistance is irf to high irf, irf710 parallel resistors R17 and R18 are not supposed to be there, as they just spoil the performance of the bridge. My tests only confirm that higher resistance increases turn on time. Martin btw, I am not overly keen on that series of devices configured that way irf710 driving mosfets.
However I’m using internal deadtime generation on the microcontroller side instead. The gate resistance is way to high ohms, the parallel resistors R17 and R18 are not supposed to be there, as they just spoil the performance of the bridge. The theory is good, but they really don’t have enough oomph to quickly switch bigger capacitance gates.
This seems to work. I think it is early to say whether this really did make the issue go away completely but after more tests today no driver chips were burned.
Other people had more problems without them when using ir21xx drivers. Martin 1 Still Irf find it disturbing that failure of the driver causes both mosfets to switch on irf the irf circuit.