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As long as that doesn’t cause it to get hotter than its maximum junction temperature, no harm will be done. The FET can’t get rid of that heat but will absorb it in its thermal mass datxsheet, heating up a little.
IRLML (IRF) PDF技术资料下载 IRLML 供应信息 IC Datasheet 数据表 (2/9 页)
Unimportant 1 6. It’s not current that kills a FET, it’s overheating. Sign up using Facebook. This current is limited by its internal output resistance since there doesn’t seem to be a limiting circuit according to the irlml283 diagram of the output stage. 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 datashset this is not the case, what am I missing?
On page 4, bottom right, there’s a graph showing the maximum safe operating area SOA of the device. 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.
The chip specifies the “typical” LO output current as 1A, not an absolute maximum.
DATASHEET IRLML5103TRPBF – International Rectifier MOSFET P Micro3
If the pulse is short enough, the FET will not heat up much and therefore survive just fine. At t 0 any capacitor will act like a short circuit. Sign up using Email and Password. MOSFETs like the ones in the MIC’s output stage can handle large current irlm2803 for a short irlml28803 by simply absorbing the heat generated by the pulse in their thermal mass.
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.
In fact, the datasheet for the MIC states: Post as a guest Name. Sign up or log in Sign up using Google. Mahendra Gunawardena 1, 9 It will survive a pulse of 7A at 20V just fine as long as it’s only 10 microseconds long.
The Apps Engineer likely will not have access to any Fab details.
IRLML 데이터시트(PDF) – International Rectifier
I would place a 0 ohm resistor there for future experimentation. That’s W dissipated in a SOT device.