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In fact, the datasheet for the MIC states: Sign up using Email and Password. My thinking is this should lead to current peaks that easily exceed the driver’s 1A maximum peak current and damage the chip, but the evaluation board demonstrates that this is not the case, what am I missing? MOSFETs like the ones in the MIC’s output stage can handle large current pulses for a short time by simply datashret the datadheet generated by the pulse in their thermal mass.
The Apps Engineer likely will not have access to any Fab details. Owing to the fact that this gate driver features adaptive dead-time and thus monitors the gate of the MOSFET to determine when it has fully turned off, a gate resistor prevents proper sensing of the actual gate. Post irkml2803 a guest Name. On page 4, bottom right, there’s a graph showing the maximum safe lrlml2803 area SOA of the device.
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The poly most modern processes use poly gates has some resistance; different Fabs have their own secret sauces. I would place a 0 ohm resistor there for future experimentation.
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IRLML Datasheet PDF –
Unimportant 1 6. If the pulse is short enough, the FET will not heat up much and therefore survive just fine. Home Questions Tags Users Unanswered. At t 0 any capacitor will act like a short circuit.
So if you just datasheft its output to ground, it will die. It’s not current that kills a FET, it’s overheating. Mahendra Gunawardena 1, 9 Email Required, but never shown.
DATASHEET IRLML5103TRPBF – International Rectifier MOSFET P Micro3
It won’t be able to deliver 1A or more continuously, however – it can only do that for short pulses. It will survive a pulse of 7A at 20V just fine as long as it’s only 10 microseconds long. As long as that doesn’t cause it to get hotter than its maximum junction temperature, no harm will be done. The current might be internally limited. Without a gate resistor the only thing limiting the current is the gate driver’s output resistance, which is supposedly low, it would not be a good driver otherwise.
The chip specifies the “typical” LO output current as 1A, not an absolute maximum.