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DRV401: Clamp diode protection on ICOMP1/ICOMP2?

AnBer
Mastermind 30090 points
Part Number: DRV401

Team,

In the datasheet we provide the below info about clamp diodes and the need to limit the input current:

What is the max and typ current that those protection on ICOMP1/ICOMP2 can sustain?
What is the life time of this protection scheme? What I mean is how long can the device survive to this typ current?
What are the typical waveforms (I amplitude and time) that it can (or not sustain)?

I saw for example that the below app note for our TVS protection device does give some brief information about it in section 4:
Reading and Understanding an ESD Protection Datasheet
Could we share some comparable data for DRV401?

Thanks in advance,

A.

  • 0
    TI__Mastermind 32090 points

    Hello AnBer,

    The ICOMP1/ICOMP2 pin can drive upto 250mA but the issue is more with the voltage limitation as you described in the section you highlighted.  The clamping diodes are for voltage limitations.  This is because the ICOMP pins are connected to an inductor and are more likely to have voltage spikes.  

    I don't understand by lifetime of protection.  The voltage cannot go below -0.5V or VDD+0.5V.  Some devices have special conditions that if you limit the current the voltage can exceed the max voltage.  This is not the case here.  The device should never have a voltage beyond the voltage described and the max current is 250mA.

    There are two different event we could be talking about here.  An ESD event or power coming from the inductor.  Everything above is for the inductor as it can provide much more power than an ESD even.  An ESD event would be higher voltage but much less power as it will be less current.  This is dissipated by the ESD structures on our devices.  

    Please let me know if you have further questions.