Questions tagged [reverse-recovery]

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5 votes
3 answers
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Diode reverse recovery time and the speed (snap back) in which recovery takes place

I'm looking at generating a circa 1 nano second current pulse by utilizing the snap-back time (usually measured in the tens of pico seconds) when a diode is "forcibly" reverse polarized ...
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1 vote
2 answers
113 views

Why does reverse recovery behavior matter for half bridge bootstrap diode?

I have seen several recommendations in the past to use a schottky bootstrap diode in half bridge drivers, even if the driver integrates a Si junction diode for the purpose, because supposedly the ...
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5 votes
1 answer
132 views

Unexpected voltage spikes at output of PFET on falling edge

I have the circuit shown below: I want this circuit to switch between 2.5V and 3.6V at the drain of the PFET when I input a square wave into the gate of the PFET. I would expect that this circuit ...
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0 answers
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How do I quantify the reverse current in a diode?

I am using a string of six diodes between a 4 kV, current limited, power supply and a capacitor to charge it to 4 kV. I then shut the supply off, hoping to leave the capacitor at 4 kV making it ...
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6 votes
1 answer
2k views

How does LTSpice model reverse recovery time?

Hello everyone, I am working on the prediction of the reverse recovery losses in a Buck converter. I have the following schematic: You can see below a zoom on the turning-off time of the diode: I ...
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2 votes
1 answer
378 views

Why turn-on speed of a MOSFET is linked to diode reverse recovery time

Here is a quote from section 3.4 "Speed-Enhancement Circuits" in "Fundamentals of MOSFET and IGBT Gate Drive Circuits" written by Texas Instruments: When speed enhancement circuits are mentioned, ...
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2 votes
1 answer
410 views

Why don't we worry about reverse recovery voltage and current of a diode in a simple circuit application?

When the diode goes into reverse recovery, why don't we worry about the power supply in that specific time since the current will be increased? Will it not damage the power supply or is it since it is ...
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4 votes
2 answers
2k views

Reverse recovery parameters

I'm trying to understand the principles of reverse recovery and read several documents about it, but there are still a few questions I cannot find an answer to or just don't understand. As reference ...
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